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Littleinch Tanks for your reply Yes. you are right. WP of the system will be limited by the lowest pressure between connected pipe and flange rating as below calculated Hoop Stress = 2*t*S/D Pipe Thickness---------Pipeline Calculated Hoop Stress ----------Flange Rating------------WP Limited By...

As per ASME B16.47, the Bore or internal diameter of WNRF flange must be specified by the purchaser. in our case, we requested three different Hub thickness of 56" WNRF A105 Class 600 to match our pipeline wall thickness (1.012", 0.81" and 0.562") is it right to assume that all these flanges...

Good Morning to All We are right now close to achieve the mechanical completion of a 4" Butane Gas Pipeline among others. We are cleaning the line and then passing the gauging plate. Calculations taking into consideration the positive tolerance (Thickness) and negative tolerance (diameter) to...

Gents It can be a silly question and I am sorry for that. Our WPS indicate the use of Rod ER80S-Ni1 (AWS 5.28)and electrode E8018-C3H4R (AWS 5.1). Which filler metal group is applicable for these electrodes? Table 1 (API 1104) makes reference to specific types of electrodes (Group 3: E8018 &...

Hi Guys Currently we are facing a big problem with our Client which complained about low thickness of epoxy primer. Pipeline factory coating is 3LPP and we are applying Polypropilene Shrink Sleeves on weld joints. Execution steps are: 1.- Surface preparation grade 2 1/2 - 50 microns roughness...

Gents, I am a little bit confused about Section 12 API 653 regading RT scope. Item 12.1.3.2 stablish "completed repairs of butt-welds shall be examined over their FULL LENGTH by RT or UT". On the other hand, item 12.2.1.1.c) says "Repaired joints in existing shell plates shall have one...

Gents, After reading the requirements or ASME IX article V regarding use of Standard Welding Procedures Specifications (QW-510). Contrary to what is allowed in AWS D1.1 where it is accepted using pre-qualified procedures without any further test, ASME IX establish mandatory visual and...

metengr Thanks for your advise. However we are not still repairing anything. We should first evaluate the actual condition of boiler and the take actions based on results. That´s why I mentioned NBCI Part 2 which required that pressure does not exceed MAWP stamped

Gentleman We are close to start a plant Shutoff for maintenance. Client scope of work state carry out hidrostatic test in 4 water tube boiler (which have been in service)at 1.5 MAWP to detect leaks. However, NBCI Part 2 section 4.3.3 a) states that test pressure shall not be greater than MAWP...

AsmeIX Thanks for your reply. Where can I get the document you make reference???

Gents I wonder how to interpret the changes on the essentials variables which require the requalification of the WPS. For instance: Statements like "Major increase" of flow rate; An "Increase" of time between passes; A "change" in the speed travel; A "decrease" of the minimum pre heat...

Sirs Thanks for all your replies. We also require to prepare a WPS for 316L metal base & ER316L stainless steel electrodes. As we did before, we will support this NEW WPS with the PQR prepared with ER347 (electrode) F-No: 6 & 304 base metal P-No: 8

Metengr Thanks, Your reply confirm my theory. I dont need to requalify the WPS if I only change the type of electrode but the F-Number remain same.

Gents I would like to hear your opinions about my statement below mentoned: We have a corporate PQR-GTAW which was qualified using an electrode ER347, Base metal AISI 304L. We pretend to use this PQR to support our new PQR to be used in different project, but due to cost issues we cannot use...