Best practice we have used is to get Radiographic Testing of same Pipe and get the films interpret now let your UT personnel test the same pipe and ask them to interpret their result and make a report.
Now you can compare RT Films with UT Test Report.
Can you please look in to the matter again. As our client is still asking for Heat Treatment.
He says "Stress Relieving is required due to short radius of bends. As per ASME Sec I (PG-19) H.T is required after cold forming if the %strain is more than 20 %"
The radius Coil's U-Bend is 42mm...
Ok if I say. A WHRB boiler having capacity of 1000 kg/hr steam operating pressure is 10 bar manufactured on ASME Sec 1
Material is SA516 Gr70 for the shell and tube sheets.
Smoke tubes are SA 106 Gr B
My Questions are:
1) Is stress relieving "necessary" on Boilers and Pressure vessels between thickness (10-20 mm) for Operating Pressure of 10 Bars under new ASME Code?
2) Is Radiography required for above said thicknesses if weld efficiency is reduced to 90% ?
Thanks!
The specification of ASME B31.1 (129.3.3)
129.3.3 A postforming or postbending heat treat-
ment as defined below is required for all ferritic alloy
steel (excluding P-No. 1) materials with a nominal pipe
size 4 in. and larger or with a nominal thickness of 12 in.
(13.0 mm) or greater.
(A) If...
Thank you for your reply.
(c) Cold bending and forming of carbon steel having a wall thickness of three-fourths of an inch and heavier, and all ferritic-alloy pipe in nominal pipe sizes of 4 inches and larger, or one-half-inch wall thickness or heavier, will require a stress-relieving...
Well there is no such restrictions in ASME Sec I.
When you really have to carryout RT of your job. You will have to get access from both sides. Inside and Outside for Film setting and for Source Setting.
Further Information on Mr Suhail's question:
Material: Alloy Steel Seamless Tube (SA213 T11) Dia 31.8mm x 3mm w.t.
Job: Replacement of Superheater Tubes
Construction Code: ASME Sec 1/ ASME B31.1 (Power Piping)
Dear All,
We have performed Cold Bending on SA213 T11 (P4) Material for Superheater tubes.
Dia of Tube is 31.8mm and Thickness in 3mm
Now what does the code say about Heat Treatment. Either we should perform heat treatment or not. If yes then please specify reference and what will be...
