In 1952, the first metal self-tightening flange was invented in the UnitedStates. As soon as it was invented, this innovation swiftly earnedacclaim and broad implementation among major European andAmerican oil companies, and has been used in complex fluid systemprojects.

      GT-LOK has a fully equipped machine shop, offering various CNCsvertical boring machines, and milling machines. Our turning capacityreaches up to 2 meters, vertical machining centers handle workpieces up ito 1.6 meters, and the CNC milling machine’'s capability extends to 3meters in length by0 .8 meters in width. Our general machine toolprovides versatile processing capabilities.

      Our experienced designers provide supplementary calculations andstress analysis for our products, utilizing AUTOCAD, INVENTORCOSMOS M finite element analysis, and other internally developeccomputer programs to serve product design and development, includingthe construction and operation of test benches.

      Our major customers span industries including petroleum, chemicaland petrochemical sectors, power, steel, marine, and related sectorsrequinng high-pressure containment solutions.

      Established in 1969, the GT-LOK brand has developed products andservices particularly in design and supply aspects over five decades oltrade.“Unique designs meet diverse on-site installation requirements.and our products are featured with high efficiency, lightweightconstruction, reliability, and exceptional sealing performance.GT-LOKpipeline connection fittings have significant advantages in diferentapplication scenarios such as factories, and were specifically designedfor extreme pressure,environmental. and temperature conditions. lheyare especially easy to installation and assembly, particularly whencompared to standard flange alignment and tightening processes, whilealso working in broader operational scenarios.

      The quality management system ofGT-LOK Engineering Company hasbeen certified by Lloyd's Register Ouality Assurance  in compliancewith BS EN ISO 9001:2008.

      All the materials’traceability and compliance with stringentspecifications are ensured through a system operated by a specialist andsupported by the latest high-tech equipment.

      After more than 70 years ofdevelopment, metal self-tightening flangetechnology has reached full maturity with no recorded safety incidentsdue to quality issues. Today, within the intemal equipment standards ofEuropean and American energy enterprises, when pipeline pressuresexceed CLASS 900, the use ofmetal self-tightening flanges instead oftraditional flanges becomes a mandatory system.However, domesticapplication ofthis technology in China remains in its initial stages.