The upset force, upset distance and rate of upset must be set so as to introduce sufficient deformation while the material is plastic to expel the molten material and contaminants from the joint interface. The current after flashing, during the first part of the upset, must be of sufficient duration to allow the upset to be fully achieved, but not cause overheating of the weld area. ![]() Fracture in this area is known as break-up. Overheated metal that is not properly forged out during upset may be susceptible to embrittlement due to grain boundary liquation of sulphides, for example. The flashing time must also be set such that the material is softened sufficiently to allow proper upset, without becoming so soft that it collapses. When the flashing is coarse or intermittent, there is a risk of forming inclusions and cratering in the weld region, leading to flat spot flaws. When heating is too low it is not possible to produce sufficient upset to achieve a sound forged weld. The upset at the weld line alters the fibre direction of the structure and this may lead to reduced ductility and the formation of hook cracks.įlashing voltage and speed are generally selected to give good flashing action and sufficient heat build-up in the weld area. Specific material factors arise when the parent material is highly inhomogeneous, for example steels containing long stringer inclusions or those that are heavily banded or have rolling defects. The quality of a flash weld is influenced by materials and process factors. National Structural Integrity Research Centre.Structural Integrity Research Foundation.Q: Do you provide samples ? is it free or extra ?Ī: 30% T/T in advance ,balance against B/L or L/C at sight. Production Process is silicasol precision Lost Waxing technology in stainless steel material, Product Range is 150LB screwed fittings, auto parts, valves and Hardware parts,etc Covering 25000㎡,constructi It is about 60km(1.5hour by car) far away from Ho Chi Minh City. ■WIN-VIET PRECISION MACHINERY COMPANY LTD ) WIN-VIET is establised in 2018, a subsidiary company of KH Group. Usually no more than 30 days, according to your quantity Replacement for free if there is any quality problem Plastic bag,bubble bag, cartons, wooden pallet,wooden boxĪvailable, customize as your design,photo,drawingģ0% prepayment T/T,balance against B/L L/C. Investment casting / Seamless Pipe MachiningĪvailable, Free sample with freight collect Nut, bushing,union, coupling, SPE, SPU,hose nipple, welding nipple, barrel nipple, parrel nippleĪMR,auto parts,Sanitary union,Sanitary fitting,Sanitary valve Carbon steel and certain alloy steel.ĭN6, DN6, DN8, DN10, DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100.Įlbow45.,90.,street elbow,tee,cross,hex nipple,red socket M/F,plug,socket banded,hex cap,round cap, Stainless Steel Pipe Union Teflon Flat Butt Weld The technology is silica precision Lost Waxing technology, after we get the casting parts, then machined by CNC lathe/taper machines,Pressure 150LBs conform to ISO 4144, SP 114, EN-10241, LIGHT TYPE. similar to male thread+ female thread, male Thread+ Male Thread, female Thread+Butt Weld. The connection types can be flexible composited in accordance with various requirements depending on the application area. The weave pattern selected for a flat butt joint is not as critical as the pattern selection for. ![]() ![]() Additionally, the unions have three different types of connecion ends: butt welding, male thread, and female thread. As the weld progresses, the electrode becomes shorter. The pipeline is connected by stainless steel union, which has three parts and a nut in the middle that makes it simple to fix and remove the unions.
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