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<title><![CDATA[Featured posts]]></title>
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<generator><![CDATA[www.philippopoulos.gr]]></generator>
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<title><![CDATA[ISO 9001 Quality Management Systems (QMS)]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/39eec57d-363b-44bc-8f44-ad9b3307c7a5.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/39eec57d-363b-44bc-8f44-ad9b3307c7a5.png" ></a><br>ISO 9001 is the internationally recognized standard for Quality Management Systems (QMS). It specifies the requirements for organizations to consistently provide products and services that meet customer expectations, applicable regulations and continual improvement objectives.
The standard is applicable across all industries and is widely adopted by manufacturers of industrial valves, pressure equipment, piping systems, automation products and other engineered industrial solutions.]]></description>
<pubDate>Mon, 29 Jun 2026 12:25:00 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/iso-9001-quality-management-systems-qms]]></link>
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<title><![CDATA[ISO 9606 Welder Qualification Testing]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/df677efc-786c-4d9f-8982-2e17d5e0905f.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/df677efc-786c-4d9f-8982-2e17d5e0905f.png" ></a><br>ISO 9606 is the international standard specifying the qualification testing requirements for welders performing fusion welding on metallic materials. It demonstrates that a welder has the practical skills required to produce sound welds that meet defined quality and safety requirements.
The standard is widely applied in the manufacture of industrial valves, pressure vessels, piping systems, boilers, heat exchangers, structural steelwork, shipbuilding and power generation equipment.]]></description>
<pubDate>Mon, 29 Jun 2026 12:18:22 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/iso-9606-welder-qualification-testing]]></link>
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<title><![CDATA[ISO 10497 Fire Type Testing for Industrial Valves]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/a2530229-bcf7-415b-a2a7-4f8acb47f7a2.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/a2530229-bcf7-415b-a2a7-4f8acb47f7a2.png" ></a><br>ISO 10497 is the international standard that specifies fire type testing requirements for industrial valves. The standard verifies that a valve can maintain acceptable pressure integrity, external leakage control and seat tightness after exposure to fire conditions.
Fire-safe certification according to ISO 10497 is widely specified in oil and gas facilities, refineries, petrochemical plants, LNG terminals, hydrogen systems and other high-risk industrial applications where valve performance during and after a fire is critical.]]></description>
<pubDate>Mon, 29 Jun 2026 12:04:58 +0300</pubDate>
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<title><![CDATA[ISO 4126 Safety Valves and Pressure Relief Devices]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/c5b9ebe9-f103-40d0-9c73-2b5048c88a60.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/c5b9ebe9-f103-40d0-9c73-2b5048c88a60.png" ></a><br>ISO 4126 is the international standard that specifies the design, manufacturing, testing and certification requirements for safety valves, pressure relief valves, bursting disc devices and other equipment used to protect pressure systems against excessive pressure.
The standard is intended to ensure the safe protection of pressure vessels, boilers, piping systems, heat exchangers and industrial process equipment by automatically relieving excess pressure before hazardous conditions occur.]]></description>
<pubDate>Mon, 29 Jun 2026 11:58:43 +0300</pubDate>
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<title><![CDATA[ISO 5752 Face-to-Face and Center-to-Face Dimensions for Industrial Valves]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/4de7250e-e020-40c4-a7cb-d213a6d289ee.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/4de7250e-e020-40c4-a7cb-d213a6d289ee.png" ></a><br>ISO 5752 is the international standard that specifies face-to-face (F2F) and center-to-face (C2F) dimensions for metallic industrial valves. Standardized dimensions allow valves from different manufacturers to be installed or replaced without modifying the piping system.]]></description>
<pubDate>Mon, 29 Jun 2026 11:51:55 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/iso-5752-face-to-face-and-center-to-face-dimensions-for-industrial-valves]]></link>
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<title><![CDATA[ISO 15848 Fugitive Emissions Standard for Industrial Valves]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/b2fbfdaf-44e3-40e6-bc65-086537bec459.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/b2fbfdaf-44e3-40e6-bc65-086537bec459.png" ></a><br>ISO 15848 is the international standard used to evaluate and classify fugitive emissions from industrial valves. The standard defines test procedures, classification criteria and qualification requirements for valves used in applications where external leakage to the atmosphere must be controlled.]]></description>
<pubDate>Mon, 29 Jun 2026 11:33:47 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/iso-15848-fugitive-emissions-standard-for-industrial-valves]]></link>
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<title><![CDATA[EN 14341 Steel Check Valves]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/1-228c920d-2981-45ba-bbb6-3c1cfbe94593.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/1-228c920d-2981-45ba-bbb6-3c1cfbe94593.png" ></a><br>EN 14341 is the European standard specifying the design, manufacturing, material, testing and inspection requirements for steel check valves used in industrial applications. The standard applies to forged, cast and fabricated steel check valves installed in steam systems, water networks, process plants, power stations and petrochemical facilities.]]></description>
<pubDate>Fri, 19 Jun 2026 12:48:24 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-14341-steel-check-valves]]></link>
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<title><![CDATA[EN 13774 Valves for Gas Distribution Systems up to 16 bar]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/e86c72f6-7c1f-4354-959e-f4f4324cf868.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/e86c72f6-7c1f-4354-959e-f4f4324cf868.png" ></a><br>EN 13774 is the European standard specifying performance requirements for metallic isolating valves used in gas distribution systems with a maximum operating pressure of 16 bar.
The standard applies to valves operating with fuel gases of the first, second and third family in accordance with EN 437 and provides additional requirements to relevant valve product standards.]]></description>
<pubDate>Fri, 19 Jun 2026 12:22:38 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-13774-valves-for-gas-distribution-systems-up-to-16-bar]]></link>
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<title><![CDATA[EN 13709 Steel Globe and Globe Stop-Check Valves]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/b8e83c07-764c-447d-9b87-58895fdf05b4.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/b8e83c07-764c-447d-9b87-58895fdf05b4.png" ></a><br>EN 13709 is the primary European standard covering steel globe valves and globe stop-check valves used in industrial process systems, steam networks, power generation facilities, chemical plants and petrochemical installations.
The standard specifies requirements for design, materials, dimensions, testing and operational performance of wrought, cast or fabricated steel valves in straight, angle and oblique pattern configurations.]]></description>
<pubDate>Fri, 19 Jun 2026 11:45:54 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-13709-steel-globe-and-globe-stop-check-valves]]></link>
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<title><![CDATA[EN 593 Butterfly Valves Standard]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/9115020f-bf03-4c9a-b086-18ae034846b0.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/9115020f-bf03-4c9a-b086-18ae034846b0.png" ></a><br>EN 593 is the European standard specifying design, manufacturing, inspection, testing and performance requirements for industrial butterfly valves. The standard establishes common engineering requirements to ensure safe operation, pressure integrity and reliable performance in industrial piping systems.
Butterfly valves manufactured according to EN 593 are widely used in water treatment plants, district heating networks, HVAC systems, power generation facilities, marine applications, chemical processing plants and general industrial services.]]></description>
<pubDate>Fri, 19 Jun 2026 11:36:53 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-593-butterfly-valves-standard]]></link>
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<title><![CDATA[EN 1983 Steel Ball Valves Standard]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/e7f96016-9a3a-41e7-91b9-1c535938018e.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/e7f96016-9a3a-41e7-91b9-1c535938018e.png" ></a><br>EN 1983 is the European standard that specifies the design, manufacturing, inspection, testing and performance requirements for industrial steel ball valves. The standard establishes requirements intended to ensure safe operation, pressure integrity and reliable shut-off performance in industrial piping systems.
Steel ball valves manufactured according to EN 1983 are widely used in steam systems, power generation facilities, chemical plants, petrochemical installations, district heating networks, marine applications and general industrial services.]]></description>
<pubDate>Fri, 19 Jun 2026 11:29:02 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-1983-steel-ball-valves-standard]]></link>
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<title><![CDATA[EN 1349 Industrial Process Control Valves]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/f9fbacea-0f8d-44af-b60b-4f91881163ef.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/f9fbacea-0f8d-44af-b60b-4f91881163ef.png" ></a><br>EN 1349 is the primary European standard for industrial process control valves. It specifies design, manufacturing, pressure-retaining, testing and performance requirements for valves used to control flow, pressure, temperature and level in industrial process systems.]]></description>
<pubDate>Fri, 19 Jun 2026 11:07:20 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-1349-industrial-process-control-valves]]></link>
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<title><![CDATA[EN 12569 Industrial Valves Terminology Standard]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/e4b5943b-8b67-4b78-b590-1b945e01b003.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/e4b5943b-8b67-4b78-b590-1b945e01b003.png" ></a><br>EN 12569 is the European standard that establishes standardized terminology for industrial valves. The objective of the standard is to provide a common technical language for manufacturers, engineers, inspectors, contractors, suppliers and end users involved in the specification, design, operation and maintenance of industrial valve systems.]]></description>
<pubDate>Fri, 19 Jun 2026 10:57:35 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-12569-industrial-valves-terminology-standard]]></link>
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<title><![CDATA[EN 12516 Industrial Valve Design Strength Standard]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/8df001e0-ab75-4af5-adf9-6d24b741016e.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/8df001e0-ab75-4af5-adf9-6d24b741016e.png" ></a><br>EN 12516 is the primary European standard governing the strength design of industrial valves. It defines pressure-temperature ratings, wall thickness calculations, allowable stresses and design requirements for valves operating under pressure.]]></description>
<pubDate>Fri, 19 Jun 2026 10:48:37 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-12516-industrial-valve-design-strength-standard]]></link>
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<title><![CDATA[Water Hammer in Steam and Condensate Systems]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/81c8932a-cc43-4e34-9efb-6ca72a5bd569.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/81c8932a-cc43-4e34-9efb-6ca72a5bd569.png" ></a><br>

Causes, Risk Points and Engineering Countermeasures
Water hammer in steam and condensate systems is one of the most severe operating phenomena that can occur in industrial steam installations. It is not simply pipe noise. It is a mechanical impact load that can stress valves, flanges, steam traps, heat exchangers, supports, pipework and control instruments.
In practice, most water hammer incidents in steam systems are related to condensate being present where controlled steam flow is expected, or to sudden condensation of flash steam in condensate return lines.
]]></description>
<pubDate>Fri, 19 Jun 2026 10:16:59 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/water-hammer-in-steam-and-condensate-systems]]></link>
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<title><![CDATA[Steam Dryness Fraction in Steam Distribution Systems]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/2aba1722-cd84-40e7-84c9-04845806e3a1.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/2aba1722-cd84-40e7-84c9-04845806e3a1.png" ></a><br>

Wet Steam, Enthalpy and Steam Separation
Steam dryness fraction is used to describe the amount of dry saturated steam contained in a steam-water mixture. In real steam systems, water droplets may be present due to boiler carryover, heat losses in pipework, poor drainage or incorrect pipe sizing.
For engineering purposes, steam dryness is not a theoretical parameter. It directly affects available thermal energy, heat transfer, steam trap operation, valve wear and the risk of water hammer.
]]></description>
<pubDate>Fri, 19 Jun 2026 10:06:28 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/steam-dryness-fraction-in-steam-distribution-systems]]></link>
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<title><![CDATA[Flash Steam and Heat Recovery]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/5b647455-e790-412e-87bf-25cc2eae0642.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/5b647455-e790-412e-87bf-25cc2eae0642.png" ></a><br>



Flash steam is generated when hot condensate at a higher pressure is released to a lower pressure. This typically occurs downstream of steam traps, pressure reduction points, condensate headers or return systems operating at a lower pressure than the steam-consuming equipment.
In terms of thermodynamic properties, flash steam is not different from saturated steam. The term describes the way it is generated: it is not produced in the boiler, but results from pressure reduction of hot condensate.
]]></description>
<pubDate>Fri, 19 Jun 2026 09:45:11 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/flash-steam-and-heat-recovery]]></link>
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<title><![CDATA[Valve Materials and Elastomers]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/5140e175-c4cc-49a6-be08-a8efde80e68b.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/5140e175-c4cc-49a6-be08-a8efde80e68b.png" ></a><br>Valve material selection should not be based only on nominal pressure or valve size. Operating pressure, temperature, fluid compatibility, corrosion risk, mechanical loads, connection type, design standards and installation requirements must be evaluated together.
The following tables provide indicative material equivalents according to EN, DIN, WNr and ASTM designations, together with typical temperature limits. These limits do not replace pressure-temperature ratings from applicable standards or manufacturer technical documentation.]]></description>
<pubDate>Sun, 14 Jun 2026 12:47:47 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/valve-materials-and-elastomers]]></link>
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<title><![CDATA[Expansion of Pipes in Steam Systems]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/73595238-09c6-42cf-8268-5e5d5e146ea2.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/73595238-09c6-42cf-8268-5e5d5e146ea2.png" ></a><br>In steam and hot fluid systems, pipe length increases as temperature rises. Thermal expansion must be considered during system design in order to avoid high mechanical stresses, excessive loads on fixed points, pipe deformation and forces transmitted to valves, flanges, steam traps, heat exchangers and other equipment.
Proper arrangement of pipe guides, supports, fixed points and expansion joints allows the pipework to move in a controlled manner and absorb the change in length caused by temperature variation.]]></description>
<pubDate>Sun, 14 Jun 2026 12:40:15 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/expansion-of-pipes-in-steam-systems]]></link>
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<title><![CDATA[Calculating Flash Steam]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/2ab1fac5-b5c5-4025-b49a-46dbca134920.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/2ab1fac5-b5c5-4025-b49a-46dbca134920.png" ></a><br>Flash steam is generated when hot condensate at a higher pressure is released to a lower pressure. The pressure reduction lowers the saturation temperature, and part of the heat contained in the condensate is converted into steam.
This phenomenon commonly occurs downstream of steam traps, pressure reducing points, condensate return lines and flash vessels. Correct estimation of flash steam quantity is important for sizing condensate lines, flash vessels, vents and energy recovery systems.]]></description>
<pubDate>Sun, 14 Jun 2026 12:33:24 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/calculating-flash-steam]]></link>
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<title><![CDATA[Content of Air in Steam Systems]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/48927a90-33c3-4b6c-90d7-adf4c39ce416.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/48927a90-33c3-4b6c-90d7-adf4c39ce416.png" ></a><br>The presence of air and other non-condensable gases in a steam system affects saturation temperature, heat transfer and equipment operation. Even a small percentage of air can cause a significant reduction in the actual steam temperature at the point of use.
Correct air venting, removal of non-condensable gases and proper selection of steam traps and air vents are therefore important factors in the operation of industrial steam systems.]]></description>
<pubDate>Sun, 14 Jun 2026 12:26:13 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/content-of-air-in-steam-systems]]></link>
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<title><![CDATA[Pressure Drop in Steam Lines]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/1d9ebd4c-c2b1-4463-bfeb-b043d6af0ed8.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/1d9ebd4c-c2b1-4463-bfeb-b043d6af0ed8.png" ></a><br>Pressure drop in a steam distribution network directly affects the available pressure at the point of use, as well as the operation of control valves, pressure reducing valves, steam traps and heat exchangers.
For preliminary technical checks, pressure drop may be estimated using the steam density, flow velocity and the total resistance coefficient of the pipework and installed components.]]></description>
<pubDate>Sun, 14 Jun 2026 12:20:27 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/pressure-drop-in-steam-lines]]></link>
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<title><![CDATA[Recommended Flow Velocities for Steam, Water and Air Lines]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/9706c1f2-b009-4460-9cd5-287a6a5a440f.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/9706c1f2-b009-4460-9cd5-287a6a5a440f.png" ></a><br>The following values may be used as an indicative guide for preliminary checks of flow velocities in industrial steam, condensate, feedwater, cooling water and compressed air piping systems.
Proper flow velocity selection affects pressure drop, noise, erosion, water hammer risk, condensate transport and the operation of valves, steam traps, pressure reducing valves and control equipment.]]></description>
<pubDate>Sun, 14 Jun 2026 12:13:52 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/recommended-flow-velocities-for-steam-water-and-air-lines]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/recommended-flow-velocities-for-steam-water-and-air-lines]]></guid>
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<title><![CDATA[Saturated Steam Table]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/e92e0f67-ca6d-478e-aaa7-b76552d3480c.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/e92e0f67-ca6d-478e-aaa7-b76552d3480c.png" ></a><br>The following table presents basic thermodynamic properties of saturated steam as a function of absolute pressure. The data may be used as a technical reference for preliminary calculations and equipment selection in steam systems, including steam traps, control valves, pressure reducing valves, safety valves, condensate lines and heat exchange applications.]]></description>
<pubDate>Sun, 14 Jun 2026 12:05:28 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/saturated-steam-table]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/saturated-steam-table]]></guid>
<slash:comments>0</slash:comments>
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<title><![CDATA[IEC 60534 Control Valve Standard]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/d950dc5d-5e1a-407c-9368-777f2fe6e4b0.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/d950dc5d-5e1a-407c-9368-777f2fe6e4b0.png" ></a><br>IEC 60534 is the primary international standard governing control valves, including sizing methods, flow coefficients, performance characteristics, noise prediction and control valve evaluation procedures.]]></description>
<pubDate>Sun, 14 Jun 2026 08:53:21 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/iec-60534-control-valve-standard]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/iec-60534-control-valve-standard]]></guid>
<slash:comments>0</slash:comments>
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<title><![CDATA[ISO 5211 Valve and Actuator Mounting Interface Standard]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/27ee02ce-8227-4024-be63-99d8a52df563.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/27ee02ce-8227-4024-be63-99d8a52df563.png" ></a><br>ISO 5211 is the international standard defining mounting interfaces between quarter-turn industrial valves and actuators. The standard enables reliable installation of pneumatic, electric and hydraulic actuators on valves from different manufacturers without requiring custom adapters.]]></description>
<pubDate>Sun, 14 Jun 2026 08:48:27 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/iso-5211-valve-and-actuator-mounting-interface-standard]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/iso-5211-valve-and-actuator-mounting-interface-standard]]></guid>
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<title><![CDATA[ISO 5208 Industrial Valve Pressure Testing and Leakage Rate Classification]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/399eba27-442d-4777-835d-4b1db0c55cef.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/399eba27-442d-4777-835d-4b1db0c55cef.png" ></a><br>ISO 5208 is the international standard defining pressure testing procedures, leakage rate classifications and acceptance criteria for industrial valves. The standard is widely used to verify pressure integrity and sealing performance before valves are placed into service.]]></description>
<pubDate>Sun, 14 Jun 2026 08:42:11 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/iso-5208-industrial-valve-pressure-testing-and-leakage-rate-classification]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/iso-5208-industrial-valve-pressure-testing-and-leakage-rate-classification]]></guid>
<slash:comments>0</slash:comments>
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<title><![CDATA[API 598 Valve Inspection and Testing]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/8357f0b4-f52e-4856-8ac6-8c3829e2388c.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/8357f0b4-f52e-4856-8ac6-8c3829e2388c.png" ></a><br>API 598 is the primary American Petroleum Institute standard governing inspection, pressure testing and acceptance criteria for industrial valves. It is widely specified in oil and gas facilities, refineries, petrochemical plants, power generation systems and industrial process applications.]]></description>
<pubDate>Sun, 14 Jun 2026 08:34:18 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/api-598-valve-inspection-and-testing]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/api-598-valve-inspection-and-testing]]></guid>
<slash:comments>0</slash:comments>
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<title><![CDATA[ASME B16.34 Valves Flanged, Threaded and Welding End]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/3d3b37cd-9a4a-49d9-b16b-68207491e07a.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/3d3b37cd-9a4a-49d9-b16b-68207491e07a.png" ></a><br>ASME B16.34 is the primary American standard governing the design, construction, pressure-temperature ratings, materials, wall thickness requirements and marking of industrial valves. It is widely specified for valves used in oil and gas facilities, petrochemical plants, power generation systems, process industries and industrial piping networks.]]></description>
<pubDate>Sun, 14 Jun 2026 08:27:36 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/asme-b1634-valves-flanged-threaded-and-welding-end]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/asme-b1634-valves-flanged-threaded-and-welding-end]]></guid>
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<title><![CDATA[EN 12266 Pressure and Tightness Testing of Industrial Valves]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/e213be55-c95f-4b38-af38-69e42f2cb69e.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/e213be55-c95f-4b38-af38-69e42f2cb69e.png" ></a><br>EN 12266 is the primary European standard defining pressure testing, tightness testing and acceptance criteria for industrial valves. The standard establishes uniform testing procedures used by manufacturers, inspectors and end users to verify the mechanical strength and sealing performance of industrial valves before delivery and commissioning.]]></description>
<pubDate>Sat, 13 Jun 2026 11:53:50 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-12266-pressure-and-tightness-testing-of-industrial-valves]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-12266-pressure-and-tightness-testing-of-industrial-valves]]></guid>
<slash:comments>0</slash:comments>
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<title><![CDATA[EN 1092-1 – PN Flanges for Industrial Valves and Piping]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/564cf326-67d3-4c99-bbf7-6e00556abca4.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/564cf326-67d3-4c99-bbf7-6e00556abca4.png" ></a><br>EN 1092-1 is a European standard for circular steel flanges used with pipes, valves, fittings and accessories in PN-designated piping systems. It specifies flange types, dimensions, sealing faces, tolerances, bolting, materials, marking and pressure/temperature ratings.
For industrial valves, EN 1092-1 is essential for correct mechanical connection between the valve and the pipeline. Matching only DN or PN is not enough. Bolt hole pattern, sealing face, flange type and compatibility with the existing installation must also be checked.]]></description>
<pubDate>Sat, 13 Jun 2026 11:26:58 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-1092-1-pn-flanges-for-industrial-valves-and-piping]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-1092-1-pn-flanges-for-industrial-valves-and-piping]]></guid>
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<title><![CDATA[EN 558 – Face-to-Face and Centre-to-Face Dimensions of Industrial Valves]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/83b9a958-da62-484f-b999-cf262f2a1de5.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/83b9a958-da62-484f-b999-cf262f2a1de5.png" ></a><br>EN 558 specifies the face-to-face and centre-to-face dimensions of metallic industrial valves installed in flanged piping systems. It is an important standard for valve selection, replacement and installation because it helps confirm that the valve has the correct installation length.
EN 558 is used for PN and Class designated valves and is especially useful when a valve must be replaced without modifying the existing pipework.]]></description>
<pubDate>Sat, 13 Jun 2026 11:20:43 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-558-face-to-face-and-centre-to-face-dimensions-of-industrial-valves]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-558-face-to-face-and-centre-to-face-dimensions-of-industrial-valves]]></guid>
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<title><![CDATA[EN 10204 – Inspection Documents for Industrial Valves and Process Equipment]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/de30d718-fc06-40a7-8cf1-61b7e4d5a6f5.png"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/de30d718-fc06-40a7-8cf1-61b7e4d5a6f5.png" ></a><br>EN 10204 is the European standard that defines the different types of inspection documents supplied with metallic products, industrial valves, steam traps, piping components, pressure vessels and process equipment.
The standard specifies how manufacturers document conformity with applicable material specifications, manufacturing standards and project requirements.
EN 10204 does not define material properties. Instead, it defines how inspection and testing results are documented and delivered to the customer.

The standard is widely used throughout industrial manufacturing, energy production, marine applications and process industries where material traceability and quality assurance are essential.]]></description>
<pubDate>Sat, 13 Jun 2026 10:44:31 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-10204-inspection-documents-for-industrial-valves-and-process-equipment]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/en-10204-inspection-documents-for-industrial-valves-and-process-equipment]]></guid>
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<title><![CDATA[Ball Float Steam Traps: Selection, Operation, and Industrial Applications]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/float-thermostatic-steam-trap-cona-s-ari.jpg"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/float-thermostatic-steam-trap-cona-s-ari.jpg" ></a><br>Ball float steam traps are mechanical steam traps used where continuous condensate removal is required under variable load conditions. They are commonly specified for steam-heated heat exchangers, process coils, calorifiers, air heaters, and other equipment where condensate must be discharged as it forms without causing temperature instability or waterlogging.

A typical ball float steam trap uses a buoyant spherical float connected to a valve mechanism. As condensate enters the trap body, the float rises and opens the discharge valve. When the condensate level drops, the float falls and reduces or closes the outlet. Most industrial designs also include a thermostatic air vent to remove air and non-condensable gases during start-up and operation.]]></description>
<pubDate>Sun, 17 May 2026 00:00:03 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/ball-float-steam-traps-selection-operation-and-industrial-applications]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/ball-float-steam-traps-selection-operation-and-industrial-applications]]></guid>
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<title><![CDATA[How to Select the Right Steam Trap for Industrial Applications]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/i000000499.jpg"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/i000000499.jpg" ></a><br>A steam trap is a self-acting valve used to discharge condensate, air, and non-condensable gases from a steam system while limiting live steam loss. Correct selection depends on the duty, not only the pipe size. A trap that works on a steam main drip leg may be unsuitable for a heat exchanger, tracing circuit, sterilizer, or pressure-reducing station.

ISO classifies automatic steam traps into three main operating groups: mechanical, thermostatic, and thermodynamic. ISO/DIS 6704 is currently under development to replace ISO 6704:1982, while retaining this actuation-based classification.]]></description>
<pubDate>Sun, 17 May 2026 00:00:02 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/How-to-Select-the-Right-Steam-Trap-for-Industrial-Applications]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/How-to-Select-the-Right-Steam-Trap-for-Industrial-Applications]]></guid>
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<title><![CDATA[Industrial Globe Valves for Steam, Thermal Fluids, Process Utilities and High-Pressure Service]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/i000001521.jpg"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/i000001521.jpg" ></a><br>
Globe valves are selected when a piping system needs positive isolation with a more controllable closing characteristic than many quarter-turn or gate-type isolation valves. In steam, condensate, hot-water, thermal-oil and process-utility systems, the seat-and-disc geometry allows progressive restriction of the flow path, so the valve can be used for isolation and, with the correct plug/disc design, limited throttling duty. The category includes bellows-sealed and packed-gland globe valves, straight-pattern, Y-pattern, angle-pattern, pressure-seal, cryogenic, forged, cast, compact and stop-check configurations. ]]></description>
<pubDate>Sun, 17 May 2026 00:00:01 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/globe-valves-what-they-are-and-their-role-in-steam-systems]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/globe-valves-what-they-are-and-their-role-in-steam-systems]]></guid>
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<title><![CDATA[What is Superheated Water and Where is it Used?]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/2-abb-ari-armaturen-fernwaerme.jpg"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/2-abb-ari-armaturen-fernwaerme.jpg" ></a><br>Superheated water is an ideal solution for high-efficiency industrial heating, operating at temperatures up to 200°C with minimal energy loss. It runs in closed pressurized circuits, offering enhanced safety, energy savings, and high thermal stability in demanding applications.]]></description>
<pubDate>Sun, 17 May 2026 00:00:00 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/what-is-superheated-water-and-where-is-it-used]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/what-is-superheated-water-and-where-is-it-used]]></guid>
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<title><![CDATA[What is Thermal Oil and Where is it Used?]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/oilplant.jpg"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/oilplant.jpg" ></a><br>Discover how thermal oil enhances industrial heat transfer processes with high-temperature stability and low-pressure operation. Ideal for food, chemical, and energy sectors, thermal oil offers safe and efficient thermal energy distribution with minimal maintenance. Learn more about its key benefits, applications, and maintenance tips.]]></description>
<pubDate>Sun, 17 May 2026 00:00:00 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/what-is-thermal-oil-and-where-is-it-used]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/what-is-thermal-oil-and-where-is-it-used]]></guid>
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<title><![CDATA[Steam – A Key Source of Energy and Heat in Industry]]></title>
<description><![CDATA[<a href="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/Integrated-Boiler-Room-HRES.jpg"><img width=130 height=100 src="https://www.philippopoulos.gr/img/ybc_blog/post/thumb/Integrated-Boiler-Room-HRES.jpg" ></a><br>Steam is one of the most important forms of energy in industrial applications, thanks to its high thermal efficiency and ease of distribution through pipe networks. It is produced by heating water in pressurized boilers and is widely used in processes such as heating, sterilization, mechanical energy transfer, and various manufacturing operations.]]></description>
<pubDate>Sun, 17 May 2026 00:00:00 +0300</pubDate>
<link><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/steam-a-key-source-of-energy-and-heat-in-industry]]></link>
<guid><![CDATA[https://www.philippopoulos.gr/en/blog-page/post/steam-a-key-source-of-energy-and-heat-in-industry]]></guid>
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