24 Inch Spiral Welded Steel Pipe
API5LGr.B,X42~X80; ASTMA252 Gr.2,Gr.3; ASTMA53 Gr.B
SY/T 5037-2000;SY/T5040-2000;GB/T3091-2008: Q235B,Q345B,20#,16Mn;
DIN 1629 ST37,ST42,ST52 etc.
5.8m-12m,or as customer’s requirements.
Bared, black painted (varnish coating), galvanized, with oiled, 3 PE, FBE, corrosion resistant coating, etc. as per clients request
Mechanical properties testing, Chemical composition analysis
by X-Ray flaw-detecting ,on-line or off-line Ultrasonic flaw detecting; Hydrostatic pressure inspection
Results of chemical analysis of spiral tube material Q235BSpiral steel pipe market demand both fast and not disorderly growth trend will not fundamentally change.Whether the spiral steel pipe market can keep the rapid development depends on the change of demand.Macroscopical economy suffers the regulation of policy level, can bring certain decelerate to market growth rate henceforthThe main raw materials are molten iron and scrap steel. The content of sulfur and phosphorus in the steel is higher than that of high-quality carbon structural steel.
Generally, sulfur is 0.050% and phosphorus is 0.045%.The content of other alloying elements in the steel brought by raw materials, such as chromium, nickel and copper, generally does not exceed 0.30%. According to the composition and performance requirements, the grades of such steel are Q195, Q215A, B, Q235A, B, C, D, Q255A, B and Q275.
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5.Zhanzhi steel has been producing and mercantilism steel merchandise for several years since the Nineteen Nineties.