Founded in 1989, Willoughby's Lokring Technology manufactures small-bore pipe fittings and fluid-system connectors that create permanent, metal-to-metal joints without welding or other hot work. Its patented ESP® technology grew from aerospace work, including development for the Apollo I Saturn mission, and the company supports industrial users through a global authorized distributor network. Lokring's manufacturing quality system is certified to ISO 9001:2015, with fittings qualified for demanding pressure-piping and marine applications.
ISO 9001:2015
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ANSI/ASME B31.1
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ANSI/ASME B31.3
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ANSI/ASME B31.4
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ANSI/ASME B31.5
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ANSI/ASME B31.8
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ANSI/ASME B31.9
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American Bureau of Shipping Manufacturing Assessment Certification
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ABS Type Approval
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API-607 Rev 4 Fire Test
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ASTM-F1387 NAVSEA
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Association of American Railroads Approval
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Canadian Registration Number OA1195
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CSA Z7396 1-09
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DNV Product Type Approval
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Lloyd’s Register Type Approval
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NSF/ANSI Standard 61
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NSF/ANSI Standard 372
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NFPA 30
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NFPA 99 Health Care Facilities Code
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California Air Resources Board Executive Order G-13-001-2025
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United States Coast Guard Approval
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NACE MR0175/ISO 15156
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NACE MR0103-2007
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