Product Specification
JCM 121 Gas Repair Clamp - sizes 2 – 8” (50-200mm) All full circumferential single band repair clamps 2” (50mm) and larger shall have a minimum material standard of certifiable prime 304 Stainless Steel band; heavy duty, low profile Ductile Iron Lugs per ASTM A536 with mutually supporting sliding fingers; 5/8” corrosion resistant alloy bolts, per ASTM A242, A193 B5, B7, and a Buna N (for natural gas service) gridded gasket with tapered lap joint ends and a 304 stainless steel bridge plate molded flush into the gasket. Gaskets in sizes 3” (80mm) and larger shall be 1/4” thick. To provide extra tightening capability, the band shall be permanently attached to the lugs by crimping the lug and locking it in place with a minimum of three stainless welds per lug. Shall meet USDOT Code 192 as applicable. JCM 121 Gas Repair Clamp - sizes 10” (250mm) and larger All full circumferential single band repair clamps 10” (250mm) and larger shall have a minimum material of 17 gauge certifiable prime 304 Stainless Steel band; heavy duty Ductile Iron Lugs per ASTM A536 with mutually supporting sliding fingers; 3/4” corrosion resistant alloy bolts, per ASTM A242, A193 B5, B7, and a 1/4” thick Buna N (for natural gas service) gridded gasket with tapered stainless steel bridge plate molded flush into the gasket. To provide extra tightening capability, the band shall be permanently attached to the lugs. The attachment shall withstand a minimum of 100 ft. lbs. of torque per bolt. Shall meet USDOT Code 192 as applicable. Not for repair of Polyethylene Gas Pipe. Suitable for reshaping and marking squeeze off locations.
This typical specification, provided by JCM Industries, is a proposed guideline for use by specifying agencies to ensure significant design and material features of this product are included within the agencies’ individual specifications.
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Effective 01.10.2024
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