Anticorrosive spiral steel pipe rusted how to deal with

- Apr 20, 2019-

Anticorrosive spiral steel pipe rusted how to deal with

As the individual quality of anticorrosive spiral steel pipe is relatively large, it must be stacked outdoors, but it is hard to avoid being exposed to the sun and rain, so the problem of rust has been troubling the storage time and condition of spiral welded pipe.Therefore, it is necessary for us to provide a comprehensive solution to the rust prevention knowledge of spiral welded pipes.Mainly USES the steel wire brush and other tools to polish the steel surface, spiral welding pipe cleaning and preheating can remove loose or warped oxide, rust, welding slag and so on.Manual tool derusting can reach Sa2 level, power tool derusting can reach Sa3 level, if the steel surface adheres to a strong scale, tool derusting effect is not ideal, not up to the anti-corrosion construction requirements of anchor depth.      Pickling USES solvent and emulsion to clean the surface of welded steel tube (welded tube) used for low-pressure fluid transportation, so as to remove oil, grease, dust, lubricant and similar organic matters. However, it cannot remove rust, scale and flux on the surface of steel, so it is only used as an auxiliary means in anti-corrosion production.

Generally, chemical and electrolytic methods are used for pickling treatment. Only chemical pickling is used for pipeline anticorrosion, which can remove scale, rust and old coating. Sometimes, it can be used as the retreatment after sand blasting and rust removal.Although chemical cleaning can make the surface to achieve a certain degree of cleanliness and roughness, but its anchorage shallow, and easy to spiral welded pipe stacking environment pollution.      Reasonable use of means to clean rusty pipe fittings to ensure long service in production, to create more production benefits. After rusting, the anticorrosive spiral steel pipe is mainly polished by steel wire brush and other tools. The cleaning and preheating of spiral steel pipe can remove loose or warped scale, rust and welding slag.Manual tool derusting can reach Sa2 level, power tool derusting can reach Sa3 level, if the spiral pipe surface adheres to a strong scale, tool derusting effect is not ideal, can not reach the depth of anchorage required by anti-corrosion construction.In addition to the traditional application, a new application is added, which makes the use of anticorrosive spiral steel tube more fruitful and reduces the cost of using anticorrosive spiral steel tube.Radio-frequency sensors provide 200 volts, 50 amperes of electricity flowing smoothly through the anticorrosive spiral steel tube and heating the experimental sample by induction.

The anticorrosive spiral tube itself does not get hot, but the experimental sample does.Radio-frequency sensors will provide more control when the heating temperature exceeds the arc melting machine, allowing scientists to adjust the specific composition of the alloy.The anticorrosive spiral steel tube has strong bearing capacity and good plasticity, which is convenient for welding and forming.Spiral seam arc-welded anticorrosive spiral steel tube (sy5037-83) is generally used for low-pressure fluid transportation. It is made by double-sided automatic submerged arc welding or single-side welding for water, gas, air and steam, etc.

Cangzhou Steel Pipe Group (CSPG) Co., Ltd

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


Product Description

Advantages of spiral welded pipe:

(1) Steel pipes with different diameters can be produced by using the same width of steel strip , especially large diameters pipes can be produced by using narrow steel strip .

(2) Under the same pressure conditions , the stress of the spiral weld is smaller than that of the straight seam( 75% ~ 90% of the straight welded pipe ) , so it can withstand greater pressure . Compared with the straight welded pipe with the same outer diameter , the wall thickness can be reduced by 10% ~ 25% under the same pressure .

(3) Accurate size , the general diameter tolerance does not exceed 0.12% , deflection less than 1/2000, ovality less than 1% , can generally save sizing and straightening process .

(4) Can be continuous production, theoretically can produce infinite long steel pipe , cutting head , cutting tail loss is small , can improve the metal utilization rate of 6% ~ 8% .

(5) Compared with straight welded pipe , it is more flexible in operation and easy to change and adjust .

(6) Light weight and low initial investment . It can be made into a trailer type flow unit to produce welded pipe directly at the construction site where the pipe is laid .

(7) Easy to realize mechanization and automation.

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