Perennial supply of carbon steel insulated joints shelf insulating joint implementation of standards

1 Overview LFJ Series insulated connectors are buried steel sealing performance requirements and electrical demand for corrosion protection works electrical insulation properties of the pipe joints collectively. It contains the assembly, insulating plate, filler, sealing rings, short tubes. Insulation joints have welded end overall structures (buried, maintenance-free) is a high-tech company to introduce the nineties, the internal structure of the use of O-type or U-shaped rubber ring seal, so far ahead of the domestic market. Manufacturing strict implementation GB150-98 "steel pressure vessel", HG20583-98 "Steel Chemical container structure design requirements," and JB4730-2005 "Pressure Vessel NDT" and other requirements, so that product quality can be improved steadily. 2, high-performance 2.1 insulation insulation joint insulation LFJ Series ring with a high compressive strength (not less than 350N / mm2), low water absorption, high dielectric strength, anti-aging materials, insulation resistance is greater than 10MΩ, far greater than Other insulation joint resistance value, thus greatly improving the insulation, reducing the leakage current, more full cathodic protection, improving the protection of the pipeline is operational life. 2.2 LFJ Series insulated steel-degree far greater than the formation of a joint pipeline section modulus of bending steel cylinder, of course, can withstand greater bending moments (at equal strength and pipeline design), eliminating the other insulating joints because the structure is not make reasonable cause stiffness caused by inadequate spill. 2.3 long life LFJ Series insulated joint use of secondary seal mechanism, O-and U-type self-tight seal, seal the laminated section insulating ring. Completely avoid products in the hydrostatic test and soil moisture and prevent internal moisture to penetrate the street, good sealing performance. Coupled with the annular space of the sleeve (assembly) within the injected polymer composite materials, low viscosity, cold-thermosetting resin. And has a compressive strength. Eliminate leakage due to seal failure caused by a leak and cause insulation failure, especially the king of rubber (Viton) seal, greatly enhance the degree of aging, so that the life of the pipeline equivalent. 2.4 underground installation LFJ Series insulated joints due to the high insulation, sealing, reliable, and pipelines and other life equally, no maintenance, so do not set up observation wells underground installation, directly buried whole. 3, the main technical parameters LFJ Series insulated joints under extreme operating conditions, reliable seal, good electrical insulation properties, any stress metal components does not exceed its specified minimum yield strength of 90%, to ensure permanent elasticity and tightness. LFJ Series insulated joints in accordance with the principles of equal strength, yield strength forging standard should yield consistent strength and pipeline material standard connection. Short section (welding and forging a short section) yield strength consistent with the connecting line of the yield strength, and a good weldability. 4, structural features LFJ Series insulated joints welded end of the overall structure. The main body as a whole forged or forged body and a short section (rolled steel or steel) welded connection structure. LFJ Series insulated joint pressure seal with O-type or U-type self-tight seal, and the seal from the molding, with a permanent residual elasticity to ensure a reliable seal the joint. 5. Materials 5.1 metal material assembly: Forgings short pipe: seamless steel tube or sheet rolled 5.2 nonmetallic materials insulation board: 3240 high strength phenolic cloth laminated board (GB1303) O and U-ring: Viton. 5.3 filler: 6 epoxy resin manufacturing performance standards LFJ Series Insulation joint inspection and acceptance of the new version to meet the requirements of the following standards, regulations and norms and in accordance with the requirements of ISO9001 quality system. GB / T1047-2005 male conduit element DN SY / T0516-8212; 2008 insulating flange design provisions SY / T0086-8212; electrical insulation standards GB 2003 pipeline cathodic protection / T8163-8212; 2008 transmission fluid with seamless Pipe GB / T1303.1-8212; 1998 3240 epoxy glass cloth laminate NB / T 47008-8212; 2010 (JB / T 4726) Pressure for Carbon and Alloy Steel Forgings NB / T 47009-8212; 2010 (JB / T 4727) low pressure equipment with low alloy steel forgings GB / T9711.2-8212; 1999 oil and natural gas industries - Steel pipe Technical delivery conditions - Part 2: B grade steel pipe GB / T1048-8212; 2005 nominal pipe element pressure GB / T1182-8212; 2008 shape and position tolerances and code injection method GB / T1184-8212; 1996 shape and position tolerances without individual tolerances specified GB / T1800-8212; 1999 tolerances and fits standard tolerances and fundamental deviations Subjects GB / T1804-8212; 2000 General tolerances for linear dimensions without individual tolerance GB / T3452.1-8212; 1992 hydraulic pneumatic rubber O-ring size series GB / T3452.3-8212; 2005 hydraulic pneumatic rubber seal with O ring groove dimensions and design calculations GB / T9969.1-8212; 1998 industrial product instructions General GB / T4208-8212; 2008 Enclosure protection GB / T50058-8212; 92 explosion and fire hazard electrical installation design specifications