welding of pipe
When the t-welded steel tube contains Ni, it has strong corrosion resistance in acidic environment. When the environment contains sulfuric acid or hydrochloric acid, the higher the Ni content in the t-welded steel tube, the stronger the corrosion resistance will be.In general, Cr can be added to t-welded steel pipe to prevent erosion.The poor edge condition of steel strip is another important cause of wrong edge.The influence of mass flow rate, heat flow density and structural parameters (ratio of helical curvature diameter to t welded steel pipe diameter Dc/D) on the heat transfer coefficient of saturated bubble boiling in vertical helical pipe.When t welded steel pipe is produced, the wrong side often occurs, which has many influencing factors.
In production practice, the steel pipe is often degraded by the out-of-tolerance of dry wrong side.Therefore, it is necessary to analyze the causes and preventive measures of the wrong side of spiral steel pipe.Due to the poor shape and dimensional accuracy of the uncut steel head and tail, it is easy to cause hard bending of the steel belt during butt joint and lead to wrong edges.Range of simulation parameters: vertical pipe: pipe diameter D=lOmm, pipe length L=660mm;Three kinds of vertical t-welded steel pipes: pipe diameter D=10mm, the changes of the ratio of curvature diameter and spiral pipe diameter of t-welded steel pipes are Dc/D= 15,20,25, spiral pitch Pt=20mm, pipe length L=503mm, L=660mm, L=817MM, respectively.Mass flow rate G=200~400Kg/(m'2·s), heat flux q=5~15KW/m'2, saturation pressure p, saturation =0.414880MPa, saturation temperature T, saturation = 283.15k.
Cangzhou Steel Pipe Group (CSPG) Co., Ltd. is a large-sized, key metallurgic enterprise of Hebei Province in North China, whose history dates back to 1994. CSPG currently em/paces six member companies with products varying from SSAW, LSAW, ERW, seamless steel pipes to 3PE pipes, galvanized pipes, casing pipes, etc. A Joint-stock corporation, CSPG occupies an area of 600,000 square meters with a total asset of $530 million.
Specialized in the production of straight welded pipe spiral pipe galvanized pipe 3PE/3PP/FBE/TPEP internal and external epoxy powder internal and external epoxy resin cement mortar two cloth three oil buried pipeline IPN8710 non-toxic drinking water internal and external plastic coated lining plastic and other anti-corrosion pipe fittings for oil and gas pipeline water conservancy projects
Executive standard :DIN30670 DIN30678 CSA Z245 AFNOR nf49-710/711 NACE rp0394/0490 AWWAC 210/C213GB/T9711 API 5L ISO 3183Material: Q235B/Q355BGR A GR B x42-x80 l245-l555
Business scope: 21.3mm-3620mmLSAW submerged arc welded pipe 325-2020mmERW straight welded pipe 6mm-711mmSMLS seamless tube 10-1120mmSSAW spiral steel tube 219-3620mmDemand for quality suppliers and partners