Dear Experts,
I have PQR for LTCS with filler wire ER-80S-Ni2 with impact test at -46C. I need to prepare a WPS for sour gas piping project with impact test at -46C which require nickel content should not be more than 1% in welding consumable. So considering the requirement of QW-404.12 if I...
Dear Gurus,
The newly added Appendix C4 in ASME Sec.I 2017 addresses the preheat and pwht requirements for P No.15E. It refers to table C-4-1 for soak band, heating band and GCB. I am confused regarding heating band and soak band. If I fulfill the minimum requirement of heat band requirements...
ASME Sec II Part-A SA 182 Clause 18.2 says "following test reports required WHERE applicable"
How one should assess whether product analysis is applicable or not? My product is conc.reducer and tee
SA 182F91
Dear Experts,
I had to verify MTRs of 1" Sch-160 tee and concentric reducer 3" x 1" Sch-160 material SA-182 F91. NDT mentioned on MTR is Magnetic Testing only. I have following queries:
1. As per SA-182 Clause 13 , NDT is required for DIN 100 and above. Is it true?
2. Are there any hydrotest...
Dear Members,
I am working on a cross country water pipeline passing through some deserts and villages with population less than 100 people. Design code is ASME B31.8 and for welding and testing referring to API 1104. As per design 10% RT is required but the repair rate is almost 24%. Like we...
Respected researchers and experts,
I am working for coal fired power plant where all the subjected materials are being used. Following are my questions please guide me:
1. T-22 and P-22 are similar in regard to welding metallurgy and pwht requirement?
2. T-91 and P-22 are similar in regard to...
Dear All,
I am facing a problem for boiler tube RT. The dia of the tube is 38mm and space between adjacent tubes is that you can insert two fingers. Our contractor is using X-ray tube and it is impossible to do DWSI as source placement at 90 degree is really not possible. The contractor is not...
Dear All,
I had started working on a coal fired water tube boiler for power plant. There is a confusion in contract that main boiler is designed on ASME and rest of the parts on GB standard. Following are my queries:
1. What are the boundaries of boiler? Do economizer, super heaters and...
Dear and Respected,
We are performing hardness testing of field sour line piping joints. Is it possible to take hardness of weld cap? Our WPS got qualified with hardness of 225(Vicker). Our project requirement is 248max. Now the scenario is for weld joint hardness value come around 262 and in...
Can you please elaborate the B31.3 2012 Clause 331.1.3 b).?
1. On what thickness we need to PWHT the pipe supports?
2. If the pipe joints need to be PWHT, the supports welded to them shall also be PWHT?
3. What does "thickness through the weld in any plane" means?
We are planning for PQR having following specs:
Material : SA-333 Gr 6 to Sa 350 LF2
Cladding : Inside and weld joint Alloy 825
Groove to qualify: 14.27 to 24 mm
Process : GTAW : up to 10 mm
SMAW : from 11 to 24 mm
My questions are:
1. As per ASME Sec.IX QW 453 tensile testing...
We need to weld A-106Gr.B and A-333 Gr f with A-320 TP 316L pipe. The filler wire to be used will be of 309L? If yes following are my questions?
1. 309L is for dissimilar metals but isn't 316L superior that 309L
2. Quantity of Mo in 309L is very low compared that to 316L. Is it ok to weld? It...
Dear All,
1. In which asme section it is mentioned that tack welding should be done by a qualified welder?
2. Does any dia restriction applies for tack welding on the basis of his qualification range? Or a qualified welder on any range can to the tack welding or fitup of any range of dia and...
Dear All,
Last line of QW-403.5 "This variable does not apply when impact testing of HAZ is not required by other sections". Can you please elaborate it. I cannot understand what it wants to convey?
Dear Contributors,
I am confused when I see the Table 331.1.1 of B31.3. Thickness range for carbon steel where PWHT gets compulsory is greater than 20mm but in inches its 3/4in which equals 19mm. What to follow? Or it is one and the same thing? Please guide
Dear All,
I am confused what QW-404.12 says regarding change in classification. Is it mandatory to use same brand if PQR is qualified with impact testing? If not can you explain why?
Regards,
Umair
We are cold forming ellipsoidal dish ends. The problem i am facing is that large dish ends which need to be formed with a joint in it, produces cracks in it after forming. The cracks majorly arise at knuckle radius at joint and adjacent to joint. The material is SA-516 Gr 70 normalized. What...
We were forming (cold forming) ellipsoidal dish ends in-house with our new press and flanging machine. Required thickness after forming should be 15.8mm, we used a plate of 18mm. After forming the thickness reduced up to 12.9mm. We have made many dishes from the same material (SA-516 Gr70) and...
Can you please guide if it is allowed to manufacture LPG road tankers on PD 5500? Its clause 1.1.4 (e) put the road moving pressure tanks in exclusion. But many companies around the world are manufacturing on it.
Good Morning,
Can any one please guide me on the following queries:
1. Our hardness of the subject tube is 100 HRB but code says it should be maximum 90 HRB. Is there any acceptable range other than defined?
2. The tensile for the same sample is coming 977 Mpa. Does tensile strength increase...
