Full Description Please note: as a requirement of the API committee that develops this publication, some errata and addendums may not be available as standalone files, they are simply incorporated into the base publication. Please note: The redline edition of this publication is a comparison of the original version of the 21st edition to the 20th edition, it does not incorporate future addenda, errata. The official version of the standard that accompanies the purchase of the redline, will include the updates addenda, errata. Please note: for the non-English versions of this standard, addenda and errata may not be included.
API Standard , 21st Edition is the industry standard for welding practices. Welding of Pipelines and Related Facilities presents methods for the production of high-quality welds through the use of qualified welders using approved welding procedures, materials and equipment in a new, clearly understood format.
Wide in scope and filled with years of accumulated industry knowledge, the latest edition of presents inspection methods to ensure the proper analysis of welding quality through the use of qualified technicians and approved methods and equipment. Standard , 18th - May ? Is it the intent of the code to specifically rule out other methods of causing fracturing through the weldment?
Figures 18 and 19 are not intended to show size, only amount or distribution see In radiographs of the girth welds, we are able to see images of aligned porosity similar to that shown in Figure Please know and think in the page for a series email and profanity. But from Sigma, you can just drag-n-drop resources to the code and sigma will automatically generate the code. He wants off on an optimal download API Standard Welding of Pipelines and Related physically be processed to complete complete. Some of the cookies we use are essential for the site to work.
And, vice versa th I When qualifying welding procedures for fillet welds, one must note the range of wall thickness and diameters over which the procedure is applicable. However, your point is very understandable so we are sending your letter to the Welding Procedures and Welder Qualifications subcommittee for review and possible revision to the standard. Paragraph "Joint Design" specifies that a major change in joint design constitutes an essential variable thus requiring requalification.
A change from a non-bevel lap fillet weld to a bevel fillet weld is a major change as it involves a bevel in addition to the fillet. However, if the same procedure is qualified on a bevel fillet weld, the same procedure can be used to weld a lap fillet because in the qualified procedure, once the bevel is filled, the joint design remaining is essentially the same as that of a lap joint Both.
Paragraph b requires requalification.
mpcpistachio.com/cache/fauquier/1509-chicas-de-16.php Also, paragraph c requires requalification. The welder could be qualified under 3. Is a welder qualified to install sleeves using E if the welder test on a Butt and Branch using E? However, to install sleeves the welder does not need to make a butt weld qualification test. The welder can make a single qualification test as described in the second paragraph of of ASPI However, this subject will be presented to the process for which they are certified under is produced.
DOT , Sec does not address a specific qualification term limit. IX for welder qualification testing.
ASME B IX for welder certification. IX for certification testing. IX, QW does address six months without welding requiring a new qualification. See the first paragraph of Paragraph 3. Is it correct to assume that header diameter in a branch connection weld is NOT an essential variable? Diameter is not an essential variable in the qualification of a welding procedure as it is not listed in Paragraph However, Paragraph requires that th company establish its own diameter range for which the procedure is applicable.
This range must then be recorded in the procedure specification. Having done this, pipe with diameters that were outside the selected range can be welded without requalifying the welding procedure. However, the procedure specification covering that weld must be changed to include the new diameter range for which the procedure is applicable th I Does the standard intend that any elongated porosity indication in the root pass should be considered to be hollow bead?
Yes th I If so, does the standard intend that the definition of linear indication length more than 3 times the width as in MT and PT be No. At the moment, we have a project.
In other words, the shorter indication is rejectable and the longer indication is acceptable. This interpretation is causing some confusion th I Is the entire procedure qualification test rejected and thus the welding procedure not qualified?
The welding procedure is not qualified because all of the test specimens shown in Table 2 and figure 3 have not been successfully tested th I Is the welder s test for the A side also rejected and thus the welder not qualified? Both welders have failed because their qualification weld must have been made using a previously qualified procedure.
See the first sentence of 6. However, had the procedure been qualified, i. A form similar to that shown in API Standard does not specifically specify information regarding the parameters of welding that is to be recorded, i.
Th Figure 2 should be used. This form should be developed to suit the needs of the individual company but must be sufficiently is left to the discretion of the individual companies. However, a record must be made of the tests given and the detailed results of each test see Paragraph 3. A list of qualified welders and the procedures for which they are qualified shall be maintained This would include written notations of the electrodes used, amperages, voltages, and travel speeds of each pass, preheat temperature s and interpass temperatures. Please provide clarification as to the meaning of API Section 3.
For example, welders on the job are qualified to weld thicknesses between 4. See Paragraph Is it permissible to utilize two welders wherein each welder would only deposit up to mm weld deposit thickness in order to fill up the weld groove? Basically, the first welder would weld the Root, Hot Pass, and Part of Fill passes; and the second welder would complete the balance of the weld thickness, i.
There was a mistake in the printing of the 19th Edition of API While the title of Figure 12 is correct, the drawing is incorrect. The drawing should be identical to Figure 12 of the 18th Edition, which shows 12 total weld specimens instead of The response to your question is no. You do need to test 12 weld specimens from each welder's half see Table The weld specimens should be equally spaced around the segments welded by each welder being qualified see Figure 12, Note 1 You must requalify the procedure.
The note to Table 1 therefore requires requalification th Fig. The larger pipe can be split and fitted to the smaller pipe.
No th Fig. Only a welder, not a procedure. However, please note that in Sections 9 and 10 "Automatic Welding" and "Automatic Welding Without Filler-Metal Additions nondestructive testing is required in addition to destructive testing when qualifying a procedure.
See Par. See 3 above th Fig. B I Paragraph of Appendix B states "For in-service fillet welds, pipe wall thickness is not an essential variable. I understand that the wall thickness of the in-service pipe is not an essential variable but what about the sleeve wall thickness? Yes, the reference to wall thickness applies to both the thickness of the sleeve and to the thickness of the service pipe.
Neither are essential variables th App. B I Can I use butt welding and fillet welding procedures qualified under Section 5 of API to make in-service welds or must I You must re-qualify because Appendix B has requirements for procedure qualification that are not required in Section 5. B I In a previous technical inquiry TI , it is stated that a change from a butt weld to a fillet weld is considered a major change in joint design and thus requires a new procedure to be qualified.
In branch connection welding, if I change the weld prep on the branch pipe from a square edge to a single bevel edge, must I consider that a major change too? See the last paragraph under Par. In judging the "Aligned Porosity as shown in Figure The inquirer is welding an 18" diameter pipeline with a wall thickness of 6.