duct spiral static pressure blasting intensityThe results show that the yield pressure of spiral welded pipe and straight welded pipe is consistent with the measured and theoretical value of blasting pressure, and the deviation is close.But the spiral welded pipe is lower than the straight welded pipe in both yield pressure and blasting pressure.The blasting test also shows that the toroidal deformation rate of spiral welded pipe blasting mouth is obviously higher than that of straight welded pipe.It is proved that the plastic deformation capacity of spiral welded pipe is better than that of straight welded pipe, and the blasting hole is generally limited to one pitch, which is caused by the constraint of spiral welding seam on the crack expansion.
duct spiral specifications
|Structural pipe||20# 35# 45# Q345B, 16Mn, Q345B-E, 20Mn2, 25Mn, 30Mn2, 40Mn2, 45Mn2SAE1018, SAE1020, SAE1518, SAE1045.|
|Liquid pipe||20# q295b-e, q345b-e|
|High pressure boiler tube||20G 15MnG 20MnG 15CrMoG, 12Cr1MoVGSt35.8, sa106b, sa106c, sa210a, sa210c, A333P2, A333P11, A33P12, A333P22, A33P36, A333P91, A333P92, A335T2, A335T11, A335T12, A335T22, A335T91, A335T23, A335T9|
|Pipeline||API SPEC 5L, X42, X52, X60, X65,X70,X80ASTMA53, ASTM A106, ASTM A333, BS301, BS3602, BS3603, BS3604, PSL1, PSL2, DNV-OS-F101, CSA-Z245|
|Alloy pipe||4140, 42CrMo, 32CrMo, 15CrMo,|
|Packing||Black paint, Varnish painting, Tarpaulin packing|
|End||Common round end, beveled.|
|Processing||Galvanizing; cutting; making thread|
However, there is no corresponding production standard for straight welded pipe.Generally spiral welded pipe sets adopt the method of on-line continuous inspection to ensure the welding quality of welding seams, which is another important characteristic of spiral welded pipe production different from straight welded pipe production.Continuous inspection is beneficial to the monitoring of welding defects, the stability of welding quality and the assurance of welding grade.Due to the limitation of production technology, it is very difficult to realize continuous continuous inspection of straight welded pipe.This will increase the probability of welding hazards and quality problems and even affect the overall reliability of pipeline operation in the future.
The Process Flow
Cangzhou Steel Pipe Group (CSPG)Co.,Ltd.
has more than eighteen years history company which located in Lecong Iron and Steel World, a well-known steel distribution center in China, with superior geographical position and convenient water and land transportation.
We are a direct-selling manufacturer specializing in the research and development of spiral steel pipes, steel coiled pipes, anti-corrosion steel pipes inside and outside. Since its inception, the company has been guided by a brand-new thinking of steel pipe product market based on the business philosophy of honesty, pragmatism and knowledge-seeking.
Edit by Ms. Vicky of CSPG
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