Also, as a point of information, the 21st Edition of API 1104 has not been incorporated by reference by the U.S. I personally always reference the relevant code so there is no misunderstanding. RE: API 1104 21st edition, Essential Variables joerg12 (Petroleum) In your case, removing the land face would be considered to be a major change using the above criteria. Opening or land of up to +/- 50% of the nominal value without the need for requalification. It would seem reasonable toĪllow changes to the bevel angle of up to +20%/-5% of the nominal value and changes to the root What is considered a major change?ĪPI 1104 does not define what constitutes a minor change in joint design. Qualification of two different welds made using different processes does not demonstrate that the combination of processes will produce welds having acceptable properties.Īs per 5.4.2.3 a major change in joint design has to be considered as an essential variable. Two PQRs written for tests on welds made using different welding processes cannot be used to support a new WPS that includes the use of multiple welding processes. Not all welding methods are applicable to all welding processes. Welding methods (or methods of application) include manual, semiautomatic, mechanized, or automatic, and combinations of these methods. What does method of application mean?Įight possible welding processes are listed in Section 1 (of API 1104). PR-186-124502-R01)from which responses follow:Īs per 5.4.2.1 a change in the welding process or method of application has to be considered as an essential variable. For example, other industry standards, reliable engineering tests and analyses, or established industry.PRCI publishes the "Guidelines for Interpretation and Application of API 1104 – Twenty-first Edition" (Catalog No. The absence of guidance or requirements is not to be considered prohibitive to a particular activity or approach that is based upon sound engineering judgment. While this standard is comprehensive, it may not address all issues that may arise. It covers the procedures for radiographic, magnetic particle, liquid penetrant, and ultrasonic testing, as well as the acceptance standards to be applied to production welds tested to destruction or inspected by radiographic, magnetic particle, liquid penetrant, ultrasonic, and visual testing methods. This standard also presents inspection methods to ensure the proper analysis of welding quality through the use of qualified technicians and approved methods and equipment. The welds may be produced by position or roll welding or by a combination of position and roll welding. The welding may be done by a shielded metal arc welding, submerged arc welding, gas tungsten arc welding, gas metal arc welding, flux-cored arc welding, plasma arc welding, oxyacetylene welding, or flash butt-welding process or by a combination of these processes using a manual, semiautomatic, mechanized, or automatic welding technique or a combination of these techniques. It applies to both new construction and in-service welding. ![]() This standard covers the gas and arc welding of butt, fillet, and socket welds in carbon and low-alloy steel piping used in the compression, pumping, and transmission of crude petroleum, petroleum products, fuel gases, carbon dioxide, nitrogen, and where applicable, covers welding on distribution systems. This standard presents methods for the production of high-quality welds through the use of qualified welders using approved welding procedures, materials, and equipment. Wide in scope and filled with years of accumulated industry knowledge, the latest edition of 1104 presents inspection methods to ensure the proper analysis of welding quality through the use of qualified technicians and approved methods and equipment. 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. Please note: for the non-English versions of this standard, addenda and errata may not be included.ĪPI Standard 1104, 21st Edition is the industry standard for welding practices. The official version of the standard that accompanies the purchase of the redline, will include the updates (addenda, errata). 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. ![]() 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.
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