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Agree with DD. Perhaps it's a typo (from your client).......it should be 2" SCH 40 and 6" SCH 160. Regards, AR

As the welder use F4 for his qualification (with backing of F3), yes he can weld using F4 with backing. Regards, AR

When the pipe manufacturer states in their MTR saying that the pipe is welded, then it means the welding is by HFI: this process is automatic and no filler metal is used (as required by SA-312).

Afox88, I try to show you some points: 1. SA-312, par 1.1 says "straight-seam welded". 2. SA-312 par 6.1.3 says "welded pipe shall be made using an automatic welding process with no addition of filler metal" 3. UW-2(c)(2) says "the ERW weld shall completed using high frequency welding...

Marcre, IMO you need to make test assembly as per Fig 4.27 and tested acc to Table 4.2, PLUS 3 additional mock-ups acc to 4.13.4.1(2)(a), (b), and (c) and one macroetch test section for each. Regards, AR

Your PQR is using unlisted material (X65), thus according to Table 4.8 (at the bottom of the table) the allowed combination for WPS is "only the specific combination of steels listed in the PQR". So, to weld X65 to X52 you need a new PQR. Regards, AR

Solinar, How to read the essential variable? Essential variable is applied to WPS compared to PQR, not the other way around. So in your case: you may apply preheat for your WPS. However, when you put preheat on your WPS then the welder shall follow it. If you need to weld with preheat less...

You can use ISO 15614-8 for welding procedure qualification of tube-to-tubesheet. The testing required: VT, PT, RT, Macro, Hardness, and push-out/pull-out (when required).

If you use 3G, 5G or 6G with uphill progression in your qualification, it qualifies all positions. Regards AR

According to App B of API 1104, for in-service welding (B.2) procedure qualification for fillet weld in Sect. 5 should be applied. Also specified in B.2.3 "The requirements in 5.7 for branch and sleeve welds are appropriate for in-service welding". (Note: 5.7 specify qualification for fillet...

Sorry....wrong placed smiley.

[smile]Ryan, As your weld is with backing, then "Where the measurement of penetration cannot be made" applies. Thus the limit is 10% thicker. Regards, AR

You can check Fig. QW-462.3(a) --> see note (b)

Interpretation: IX-04-11 -- in question 3: when the material are from different P-numbers, then the answer is "No". Thus, in your case : as you have same P-No, then your qualified thk range is 0.120" to 0.75" Regards

Agree with DD. To make it short: QW-407.6 = QW-407.1 + increase 25% time or more Regards

Yes. 2 macros for EN (EN 15613 refers to EN 15614) As for using macros ASME to qualify EN? I think it's not possible. EN different with ASME in term of: sample position (EN 15614), procedure (EN 1321), and acceptance criteria (EN 5817).

As you have PQR with 2 hrs 30 min (150 min), then you can go for WPS until 3 hrs 7.5 min (187.5 min). This equals to 162.5 mm.

No. It's the weld size

No.1: Don't mixed up between fillet weld size vs width of weld face No.2: See the tolerance at the top-right of the table --> see the "As fitup" column. R for root opening and alpha for groove angle. Hope this help.

For WPS, use only Table 4.1 Table 4.10 is for welder / welding operator.