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Thanks guys for the last info (sorry was abroad for a time) exactly here is the point: As I explained to the client ASMME II (material, X 42 not covered, etc.) U-stamp when designed acc. to ASME VIII, etc. - no clue. what you said: the barrel 31.4 and only the pig launcher closure (door) acc to...

Steve, thanks for your answer and indeed DNV is not recognised here (Asia-Pacific region)I prefer the "well known" standards like ASME, API, ANSI, JIS or EN standards. All these standards issued by DNV, TUV, ABS, etc. are creating sometimes more confusion instead to be helpful.

I would say the DNV “Standard” is more a guideline or might be a local standard only. It is not clear that this is an internationally recognised standard because if you see an official EN, you always find a foreword of CEN (European Committee of Standardization) similar in ASME codes. However...

Hi David, thanks for clarification. In our client's spec is written "manufactured acc to ASME VIII, that's I wasn't sure about the applic. standards. Indeed in 31.4 chapter V and VI (construction, assembly, welding / testing), so why ASME VIII? Thanks

we build a tank farm (API 650)with on- and off shore pipeline with pig launcher / receiver. Code for CH-transportation systems is 31.4 and it is written that 31.4 cannot be used for pressure vessels (chapter I, 400.1.2b. My understanding is a pig launcher is a pressure vessel (manufacturing acc...

we build a tank farm (API 650)with on- and off shore pipeline with pig launcher / receiver. Code for CH-transportation systems is 31.4 and it is written that 31.4 cannot be used for pressure vessels (chapter I, 400.1.2b. My understanding is a pig launcher is a pressure vessel (manufacturing acc...

Thanks a lot. My idea was max. 250HV10. We are welding SA516 Gr70, 28mm vertical up by EGW (tank) and I expect higher hardness espec. at the HAZ because of a short Ts 8/5 time and high heat input (kJ/m). Cheers

Hi, Has anybody realated links for hardness (ASME???) or valuable results of hardness test on SA 516 Gr70 (1"= 25mm thickness) without PWHT, parent metal, HAZ, weld metal. Thanks