Our Services1 We are a manufacturer with more than 12 years producing experience of ductile iron grooved pipe fittings and couplings.2 Professional manufacturer3 OEM acceptable4 Sample acceptable5 Competitive price for world market.6 Product quality are comparable with Victaulic7 Products are listed, approved and or certified by UL/ULC, FM and CE8-1 Housing are made of Ductile Iron conforming to ASTM A536, Gr. 65-45-12. 8-2 Coupling is supplied with an EPDM gasket and two pairs of bolts and nuts.8-3 Bolts are heat treated and conform to the requirements of ASTM A183 and Nuts to ASTM A194.8-4 Available in sizes 1” through 12” diameters.8-5 Fittings and couplings are painted orange or red, or as an option can be supplied hot dipped zinc galvanization & coated with rust inhibiting paint. Other coatings by special request are availableProduct Uses“LUYUAN” grooved couplings and fittings provide a rigid or flexible pipe connection for fire protection systems with dependable seals over a range of internal pressure situations.“LUYUAN” also offers Short Pattern Products through 8” to meet all of your fire protection needs.Quick and easy installation and durable material construction make these.“LUYUAN” couplings and fittings ideal for almost any fire protection application in both wet and dry systems.