Technical Insights
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2026-10-29 · 5 min
Since the 2021 edition, every overpressure-protection rule in the ASME Boiler and Pressure Vessel Code lives in one place — Section XIII. The UV stamp on a relief valve is the visible end of a certification chain that runs through witnessed capacity tests and production sampling.
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2026-10-26 · 5 min
Caustic soda punishes valve materials on two axes at once — stress-corrosion cracking above roughly 60 °C, and solidification below about 12 °C. The material map that solves it has been public for decades; the failures keep happening anyway.
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2026-10-22 · 5 min
The oil and gas producers' supplementary specification for API 6D ball valves moved to version 4.0 in April 2026 — while the base standard it annotates is simultaneously being written into US federal pipeline law.
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2026-10-19 · 5 min
A valve is two material decisions, not one: the body holds the pressure boundary, the trim lives in the medium. Getting the ladder right — WCB to CF8M to duplex to nickel alloys — is mostly about knowing which question you are answering.
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2026-10-15 · 6 min
MSS has published the first revision since 2012 of SP-134 — the ANSI-approved standard practice for cryogenic valves, including the body and bonnet extensions that keep a valve's packing out of the cold zone.
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2026-10-12 · 5 min
ASME issued B16.34-2025 on 30 May 2025 — the first revision in five years of the standard that defines what Class 150 through Class 4500 actually mean for a flanged, threaded or welding-end valve.
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2026-10-08 · 7 min
The EU's methane regulation has moved from design to enforcement: leak surveys at two sensitivity levels — 17 grams and 1 gram of methane per hour — now carry legal repair clocks of five and thirty days, and valves sit at the top of the component count.
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2026-10-05 · 7 min
On 1 January 2026, US pipeline safety regulations began pointing at the 25th edition of API Specification 6D — moving the 2021 valve specification, together with its hydrogen-service addendum, into the federal rulebook for gas and hazardous-liquid pipelines.
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2026-09-28 · 12 min
A seat-leakage rate is a formula, not a promise. Rate D permits 0.1 mm³/s per DN of liquid — and 30 mm³/s per DN of gas, three hundred times more, under the same letter.
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2026-09-28 · 11 min
A fire-safe certificate is a type test on a design, not a test on the valve in the crate — ISO 10497:2022 measures four things, and lets the qualification be extended to sizes and ratings that were never burned.
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2026-09-28 · 11 min
"NACE compliant" is not a specification. The standard qualifies a material in a defined H₂S environment — and the environment is the part buyers leave out of the enquiry.
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2026-09-23 · 11 min
Three valve types, three rules applied without exception — the reason behind each rule is what tells you when a duty is the exception.
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2026-09-23 · 10 min
Function eliminates more options than any other input, and getting that order wrong wastes every later step.
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2026-09-23 · 10 min
The body has one temperature limit and the seat has another; the valve is limited by whichever is lower, and the seat is the one that usually fails first.
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2026-09-23 · 12 min
BS 6364 was withdrawn in 2015. A specification that still names it is asking for a document that has not been current for eleven years — and the requirements now sit in four other places.
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2026-09-23 · 14 min
The Chinese cryogenic valve standard is in force, numeric and free to read in full. A Chinese supplier's test report is built on it — and its scope starts at −29 °C, warmer than most buyers expect.
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2026-09-23 · 21 min
The code on a low-emission certificate carries four separate claims. Read it as one quality grade and you will specify the wrong valve.
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