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Hello Ooscnicram, In your case guideline 2/8 is not applicable and the oil vessel falls into cat. IV of PED. Regarding the water, yes you are right, for TS > 110C water shall be clasified as a gas. Best regards,

Dears, Does anyone have a model of leg from pipe placed in the knuckle area of the head. The Nozzle Pro has not structure from pipe. Brgs. Jack

Dears, Does anyone have a model of leg from pipe placed in the knuckle area of the head. The Nozzle Pro has not structure from pipe. Brgs. Jack

Hi All, For parameters as were sent last time for anhydrous ammonia (NH3) and after read your comments I think that PWHT is not required. But, I am not sure for 100%.

Hi, I have following conditions: MAWP = 12 bar (174 psi), and MAWT = 50°C (122 F).

Hi, I have a tank made from carbon steel type SA516 Gr. 60 with thk. = 10 mm (0,4 inch). The question is, heat treatment for welds of the tank shall be applied or not?

Hi. I would like consult an expert. I check the design of ball valve different types. One of them is for preinsulated bonded pipe systems for directly buried hot water networks acc. to EN 488. Mentioned standard says that valves shall withstand the load comes from axial forces (tensile stresses...

What is minimum distance between shell circumferential weld and attached stiffening ring weld. Is this value = 50 mm min.?

What is minimum distance between shell circumferential weld and attached stiffening ring weld. Is this value = 50 mm min.?

Is it right to determine pressure test value acc. to AD 2000 Merkblatt last edition (to satisfy PED requirements) for heat exchangers type of AET or AES (and the others) taking into consideration not only shell and heads but also main flanges and their bolts as pressure parts? This situation...

Is it right to determine pressure test value acc. to AD 2000 Merkblatt last edition (to satisfy PED requirements) for heat exchangers type of AET or AES (and the others) taking into consideration not only shell and heads but also main flanges and theirs bolts as pressure parts? This situation...

Hello IJzer, Many thanks for your information, If you remember please tell me on which part of AD2000 I can find this information. Regards Jack

Hello IJzer, So, in this case impact test is sufficient at 20 degree of Celsius or not? For me this is not too clear. Jack

Following your knowledge and experience please tell me what do you think about following case: - Pressure vessel is designed according to AD 2000 Merkblatt - Materials are taken from AD 2000 (part. W4 for nozzles pipes); - min. operating temperature TS is –29 degree of Celsius Shall be or not...

Does not nobody know how is determined pressure test acc. to API std 560.

Hi, I recommend Microprotol. Microprotol handles : Pressure Vessel, Shell and Tubes Heat Exchanger, Air Cooler, Steel Stack, Boiler. Please check: http://www.microprotol.com

You always can determine allowable stresses using max temperature of heating part (e.g. temp. of heating oil included in coil or in jacket). I thing that probably this answer is not satisfactory for you.

WHAT IS THE PRESSURE TEST VALUE ACC. TO LAST EDITION of ABOVE MENTIONED CODE? 1.5px(Sa/St) or 1.3p... Many thanks for answer.

WHAT IS THE PRESSURE TEST VALUE ACC. TO LAST EDITION of ABOVE MENTIONED CODE? 1.5px(Sa/St) or 1.3p... Many thanks for answer.

Many thank Johny for your answer, but I have still doubts. Because some guys in case like above mentioned using allowable stresses from PED - f = min(Ret/1.5; Rm/2.4). Regards