API 1104 โ Welding of Pipelines and Related Facilities Gap Analysis
Systematically assess your pipeline welding programme against API Standard 1104 โ covering welding procedure specifications (WPS), procedure qualification (PQR), welder and welding operator qualification, production welding controls, visual and NDE inspection, acceptance criteria, weld repair procedures, tie-in welding, and welding records management.
API 1104 (21st Edition)WPS / PQR QualificationNDE โ RT / UT / MT / PTAcceptance CriteriaRepair & Tie-in WeldingAuto-Save Enabled
ISO Xpert is a leading API and ISO management system consultancy and training provider headquartered in London, UK. We support pipeline contractors, operators, and owners in developing and maintaining compliant API 1104 welding programmes โ from initial gap analysis and WPS/PQR review through welder qualification programme assessment, NDE procedure compliance, and acceptance criteria verification.
Our welding consultants bring practical pipeline welding experience across onshore and offshore transmission systems, covering all common welding processes (SMAW, GMAW, FCAW, GTAW, mechanised GMAW), all NDE methods (RT film and digital, AUT, manual UT, MT, PT), and all applicable regulatory frameworks (ASME B31.4, B31.8, 49 CFR Part 192/195, PHMSA regulations, and international equivalents).
API 1104API Q1API Q2API Spec 5LISO 9001ISO 45001WPS/PQR ReviewWelder Qualification AuditNDE Procedure ReviewRT / AUT / UT InspectionAcceptance Criteria AssessmentRepair Programme ReviewTie-in Weld ComplianceTraining Courses
๐ Contact Information
๐ข
ISO Xpert Ltd 71-75 Shelton Street, Covent Garden London, WC2H 9JQ United Kingdom
Our specialist team provides gap analysis, WPS/PQR review, welder qualification audit, and NDE compliance support for pipeline welding projects worldwide. Contact us for a free consultation.
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1. Data We Collect
Assessment Data: Company, project, pipe service, grade, welding process, NDE method, regulatory code, scope, and gap analysis responses โ stored locally in your browser.
Contact and usage data when you interact with our website or contact us.
ISO Xpert Ltd | 71-75 Shelton Street, London WC2H 9JQ | info@iso-xpert.com
Terms of Use
Last Updated: April 2025 | ISO Xpert Ltd
1. Permitted Use
For legitimate internal pipeline welding programme compliance assessment, internal reports, and programme improvement.
2. Intellectual Property
All tool content is the intellectual property of ISO Xpert Ltd. API 1104 is the property of the American Petroleum Institute (API). This tool provides interpretive guidance only. ISO Xpert Ltd is not affiliated with API.
3. Disclaimer
Results are indicative only and do not constitute a formal API 1104 audit. Seek qualified professional advice for all pipeline welding quality decisions.
4. Governing Law
These Terms are governed by the laws of England and Wales.
5. Contact
ISO Xpert Ltd | 71-75 Shelton Street, London WC2H 9JQ | info@iso-xpert.com
Common Questions
API 1104 Welding of Pipelines โ Frequently Asked Questions
Authoritative answers about API 1104 Welding of Pipelines, inspection intervals, qualifications, RBI, and ISO Xpert consulting.
What is API 1104?
API 1104 is the American Petroleum Institute Standard for Welding of Pipelines and Related Facilities. It covers gas and arc welding of butt, fillet, and socket welds in carbon and low-alloy steel piping used in the oil and gas pipeline industry for transmission of crude oil, petroleum products, fuel gases, carbon dioxide, and nitrogen. It specifies requirements for welding procedure qualification, welder qualification, production welding, inspection and testing, and acceptance criteria.
What welding processes does API 1104 cover?
API 1104 covers all common arc welding processes used in pipeline construction including shielded metal arc welding (SMAW), gas metal arc welding (GMAW), flux-cored arc welding (FCAW), gas tungsten arc welding (GTAW), submerged arc welding (SAW), and plasma arc welding (PAW). It also covers oxyacetylene welding (OAW) for certain applications. Each process must be qualified by testing a weld produced under the specific procedure.
What NDE methods does API 1104 specify for pipeline girth welds?
API 1104 specifies radiographic testing (RT) as the primary method for pipeline girth weld inspection. Ultrasonic testing (UT), including automated ultrasonic testing (AUT) used for mechanised welding applications, is an alternative to RT where approved. Magnetic particle testing (MT) and liquid penetrant testing (PT) are used for surface examination. Visual inspection is required for all welds.
What are the essential variables in API 1104 procedure qualification?
Essential variables in API 1104 are those changes to welding procedure that require requalification. They include: base metal group, pipe diameter range, wall thickness range, joint design, welding process, filler metal classification and brand (for certain changes), position, direction of welding (uphill vs downhill), shielding gas type and composition, preheat and PWHT requirements, and current type and polarity. A change to any essential variable requires a new procedure qualification test.
Can ISO Xpert help with API 1104 welding programme compliance?
Yes. ISO Xpert provides API 1104 welding programme gap analysis, WPS/PQR review, welder qualification programme assessment, NDE procedure review, acceptance criteria verification, and training for pipeline welding quality personnel. Contact us at info@iso-xpert.com or call +44 7853 109840.