When you specify Lokring-Coldweld™ fittings, you’re specifying a connection system that has earned the confidence of the world’s most demanding regulatory bodies — from naval commands and classification societies to environmental agencies and international standards organizations.
Since 1989, Lokring has pursued independent verification of what our technology delivers: permanent, weld-equivalent connections that perform under pressure, in critical environments, across a broad range of industries. The approvals below represent decades of qualification testing, third-party audits, and demonstrated field performance — not just paperwork.
Lokring meets or exceeds the following technical specifications, standards, and approvals:
- American Bureau of Shipping (ABS)
– Manufacturing Assessment Certification
– Stainless Steel (SS) Type Approval
– Copper Nickel (CN) Type Approval
– Carbon Steel (MAS) Type Approval
– Low Temperature Carbon Steel (LTCS) Type Approval - American Petroleum Institute – API-607 Rev 4 Fire Test
- ANSI/ASME B31.1, B31.3, B31.4, B31.5, B31.8, and B31.9
- ASTM-F1387 NAVSEA
- Association of American Railroads (AAR)
- British Ministry of Defence
- California Air Resources Board (CARB)
- Canadian Registration Number (CRN) • OA1195
- Canadian Standards Association (CSA) Z7396 1-09
- DNV TA – Product Type Approval for elastic strain preload (ESP ™ ) SS40, MAS-3000 and CN Product lines
- ISO 9001:2015 – Issued by DNV GL – Business Assurance
- ISO 9001:2015 (Lokring Europe Ltd.) – Issued by LRQA
- Lloyd’s Register
- Lloyd’s Register LR23405429TA – Type Approval Certificate with Appendix
- Lloyd’s Register LR26268790TA – Process Piping- Type Approval Certificate
- Louisiana Department of Environmental Quality (LDEQ)
- National Fire Protection Association, standard for health care facilities (NFPA 30)
- NSF 61 & 372 Certifications for Potable Water Fittings
- NFPA30
- NFPA 99: Health Care Facilities Code, 2012, 2015 and 2018 Editions.
- Ohio EPA (USA): Determined that Lokring metal-to-metal ESP connections meet welded-equivalency criteria under RCRA organic air emission standards (OAC 3745-205 and 3745-256), when installed per manufacturer installation procedure
- United States Coast Guard
Approval and Qualification Testing Details
Lokring has approvals for several products in different markets. We have aggregated details about each of these products by group. Please let us know if you have any additional questions about product approvals by contacting us online.
Details on the products include:
