316 stainless steel, 18Cr-12Ni-2.5Mo Due to the addition of Mo, its corrosion resistance, atmospheric corrosion resistance and high temperature strength are particularly good, and it can be used under harsh conditions; excellent work hardening (non-magnetic). Equipment used in seawater, chemical, dye, papermaking, oxalic acid, fertilizer and other production equipment; photography, food industry, coastal facilities, ropes, CD rods, bolts, nuts. Chemical composition of 316 stainless steel: C≤0.08, Si≤1.00, Mn≤2.00, P≤0.035, S≤0.03, Ni:10.0-14.0, Cr:16.0-18.5, Mo:2.0-3.0. Mechanical properties of 316 stainless steel: tensile strength (Mpa) 620 MIN, yield strength (Mpa) 310 MIN, elongation (%) 30 MIN, area reduction (%) 40 MIN, density of 316 stainless steel 8.03 g/cm3, this value is generally used for austenitic stainless steel.
Flat welding flange is a common flange type, which has the advantages of simple production, low cost, and easy installation. Its structural feature is that the flange and the pipeline are connected together by welding, and the welding position is generally at the end of the pipeline. Flat welding flange has a simple structure, good flow performance, and can be applied to various media and pressure requirements. It is widely used in pipeline connection and equipment manufacturing.The connection between the flat welding flange and the pipeline is to insert the pipe into the inner hole of the flange to the appropriate position first, and then lap weld. A flat welding butt welding flange is a flange with a neck and a round pipe transition and butt welded to the pipe. Butt welding flanges are not easy to deform, have good sealing, are widely used, have corresponding rigidity and elasticity requirements and reasonable butt welding thinning transition, the weld is far away from the joint surface, and the joint surface is free from welding temperature deformation.