We have a fixed roof tank with a flush type clean out door, which is required to be stress relieved in accordance with API 650.
The problem is that the tank fabricator installed the door into the tank without completing all the welds, but stress relieving was however performed on the...
We have a concrete tank foundation that is out of the flatness tolerance specified by API 650.
What remedies are commonly used? We are considering a sand and bitumen layer to bring the flatness into spec, any comments?
Further, due to the location of the site and availability of bitumen...
Hi All
How is acceptable hardness values determined for material/HAZ/weld metal on API 650 tanks? The material is ASTM A 516 Gr 70 and PWHT to API 650 is done due to wall thickness.
Should this have been determined during weld procedure qualification or does published acceptance ranges exist...
Hi
We are manufacturing a water pipe stop (either a blank or a head welded to a weld neck App 2 flange) where a valve is removed and it is designed/manufactured to ASME VIII Div 1. The inner diameter is ~700mm and the design pressure is 3500 kPa. We want to follow the flange to head path, due...
Hi
Does ASME VIII Div 2 specify a surface finish and profile for vessels operating in fatigue service? For example fillet welds that are radiussed and circ/long welds that are ground smooth.
OR is there a recognised standard which states or provides samples/photos/etc, by which the weld...
Hallo All
What is the ASME B16.9 forming/manufacturing allowance for fittings made from ASME SA 234 WPB (Holiday break and the spec is in someone's office!)? ASME IIA lists the allowance for SA 106 Gr B pipe (12,5%), but not for SA 234 WPB. ASME VIII I discusses pipe undertolerance a few times...
Hi all
Does anybody know where I can find details for BS 1560 Part 2, 1970 flanges? Or what are the equivalants?
We are replacing a heat exchanger which is currently attached to piping with these flanges. Sizes are 24" to 40", so simply providing mating flanges is my last resort!
Thanks
Hi
I have an interesting situation where the line between pressure vessel and pressure piping has been blurred. I would like to know if anybody is aware of a rule when to treat a component as a pressure vessel / boiler component / piping. We have a fired heater where some parties want the...
Could anyone provide me with a design code or standard for the design of a vessel operating under vacuum (-22 kPa)condition? Internal pressure is only liquid level. The vessel is a large diameter (7000mm) absorber with a 15 degree top cone, flat supported bottom and a large rectangular opening...
