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Dear All I would like to know the procedural requirements when asme coded pressure vessel/ boiler are decommissioned /scrapped like Informing National Board/AI etc/ Thanks in advance Sree60

Hello members We are looking for a facility in South east Asia ( malaysia/ singapore and nearby places) which can arrange for mechanical run test of a screw compressor ( kobelco make). The compressor which was to be commissioned was stripped and overhauled. Any info will be greatly...

Hello members I would like to have clarification with regards to shaft alignment tolerances mentioned in API 686 second edition dec 2009 clause 5.4.6.2 which states"When using reverse rim ( dial) indicator methods or laser equipment that resolves alignment into reverse rim equivalent readings...

Thanks gentlemen for the reply sree60

Dear Members Would like to know if hydrotesting of ASME Coded vessels ( VIII Div 2) can be done for more than one vessels together.( 2 vessels in our case) The hydrotest pressure is same and vessels are identical.An interconnecting hose will be used to connect the vessels. Is there any extra...

Thanks DSB Could you please let me know how to access/ buy this dutch code? Any web link will be greatly appreciated Sree60

Members This is an old topic discussed earlier . (thread292-225652) Safe distance during hydrotesting. The formula discussed was safe distance = (0.15) x (D) x (a)^0.4 x (p)^0.6 where D - internal diameter (m) a - length / diameter of piece (m) p - test pressure (bar) The...

Hi members The pressure vessel ( in service) nozzle welds are required to be tested by manual UT . The vessel is PAINTED. Can UT be performed over paint? The calibration is always done on an unpainted reference block. How is the compensation done for the error introduced due to the paint . Any...

Thanks for the inputs. We have only blind flanges on the vessel nozzles and they are ASME flanges with correct ratings.There is no low temperature involved also . Hoping for a incident free testing Sree 60

Hello members A query related to safety during hydrotest of pressure vessel.The hydrotest pressure is 285 bar. Are there any guidelines for safe cordon off distance for various pressures during hydrotest? For lower pressures we used to maintain arond 2 metres cordon off distance. since this...

Hi All Thanks for the generous inputs The vessel is a flare KO drum ( dia 6 meters)and we have inlet vane diffusers as internals. We do have CFD report ( computational fluid dynamic )However we are checking with vessel internal designers to confirm if the internals are designed to take...

Hi Members We have a situation where the Stainless steel pressure vessel having internals and built to ASME Sec VIII div 1. is required to be hydrotested ( test pressure -12 bar)with all the internals fitted. is there any precaution which needs to be taken apart from proper bolting of internals...

Hi Guys Can anyone direct me to the tolerance for the following in pressure vessels built to ASME Sec VIII Div 2: 1) Vertical vessel base ring tilt & levelness 2) Horizontal vessel skirt base plate tilt and levelness Is there any reference in sec VIII? Thanks in advance Sree

Thanks Mr Jones for your feedback.The materials in question are SS316L grade which are used for internals in process vessels under sour service.

hello members FOR SOUR SERVICE Our client specification stipuilates "Material shall meet the requirementsof Nace MR0175/ISO15156" The material test certificate does not have this confirmation statement as above but the chemical properties and hardness values are meeting the requirement of Nace...

Hi Members For a pressure vessel built to ASME Sec VIII, is it allowed if shell (15mm thk ) circumferential joints with excessive root gaps upto 10 mm are welded by using temporary backing strips.Normally the excess root gaps are corrected by buttering the bevel ends.Joint detail is is single...

The thickness OF WELD OVERLAY is more than 3 mm and close to 5 or 6 mm. This rsults in reduced bore than specified in the drawing.This is out of permissible tolerance for the bore as per ASME B 16.5.We would ask purchaser/ engineer. Thanks for the inputs sree60

Hello Members We have a 3in forged nozzle ASTM A 105 Clad with 3 mm SS316L attached to the shell of clad vessel HP separator. The clad thickness specified is 3 mm.As per approved drawing the bore of base metal of forged nozzle is 73.66 mm and inside dia after cladding is 67.66 mm (73.66-6mm)...

Thanks metengr I think we can consider this forming similar to heat treatment operation. Most codes and specifications stipulate NDE after heat treatment whereas fabricators carry out internal NDE before heat treatment to be on the safer side. sree

Hello Members The specification for manufacture of coded pressure vessels stipulates that if the dish head (SA 516 Gr 70 2:1 semi ellipsoidal)is made of more than one plate, the seam joint shall be 100% radiographed prior to forming.In a previous project the requirement of 100% NDE requirement...