| Payment Type: | L/C,T/T,D/P,D/A,Paypal |
| Incoterm: | FOB,CFR,CIF,EXW |
| Transportation: | Ocean |
Model No.: SY/T5037-2000, GB/T9711.1-1997, API-5L PSL1, API-5L PSL 2
Brand: Xinsuju
Standard: Bs, Gb, Astm, Jis, Din, Api
Material: Api J55-Api P110, A53-A369, Q195-Q345
Section Shape: Round, Square
Place Of Origin: China
Application: Fluid Pipe, Boiler Pipe, Drill Pipe, Hydraulic Pipe, Gas Pipe, Oil Pipe, Chemical Fertilizer Pipe, Structure Pipe
Production Process: Hot Rolled
Certification: Bsi, Ce, Ul, Api
Surface Treatment: Galvanized
Whether Alloy: Is Alloy
Tolerance: ±1%
Category: Square tubes, Spiral Welded Pipe, Welded Steel Pipe, Seamless Steel Pipe
Processing Service: Bending, Welding, Decoiling, Punching, Cutting
| Selling Units | : | Kilogram |
| Package Type | : | Standard export sea-worthy packing or customized |
| Picture Example | : |
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Surface treatment method
| Cleaning | The grease, dust, lubricant and organic matter adhered to the surface of the steel pipe are generally cleaned with solvent and emulsion. However, the rust, oxide scale and welding slag on the surface of the steel pipe cannot be removed, and other treatment methods are needed. |
| Derusting from east to west | Steel pipe surface oxide scale, rust and welding slag can be cleaned and polished with wire brush. The east-west derusting can be divided into manual and power. The manual east-west derusting can reach Sa2, and the power east-west derusting can reach Sa3. If the surface of the steel pipe is attached with a particularly strong oxide skin, it may not be cleaned by means of rust removal, and other methods need to be found. |
| Acid pickling | Common pickling includes chemical and electrolytic methods. However, only chemical pickling is used for pipeline corrosion protection. Chemical pickling can reach a certain degree of cleanliness and roughness on the surface of the steel pipe and facilitate subsequent anchor lines. Generally, it is used for reprocessing after shot blasting (sand).
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| Shot blasting for rust removal
| The blade is driven by a high-power motor to rotate at high speed, so that the steel sand, steel shot, iron wire segment, minerals and other abrasives can spray and blast the surface of the steel pipe under the effect of centrifugal force. On the one hand, the rust, oxide and dirt can be completely removed, and on the other hand, the steel pipe can reach the required uniform roughness under the effect of strong impact and friction of the abrasive.
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Straight seam welded pipe has the advantages of simple production process, high production efficiency, low cost and rapid development. The strength of spiral welded pipe is generally higher than that of straight welded pipe. It can produce welded pipe with larger pipe diameter with narrow blank, and welded pipe with different pipe diameter with blank of the same width. However, compared with the straight seam pipe with the same length, the weld length increases by 30 ~ 100%, and the production speed is low. Therefore, straight seam welding is mostly used for small-diameter welded pipes, and spiral welding is mostly used for large-diameter welded pipes. Spiral pipe is mainly used in tap water engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation and urban construction. It is one of the 20 key products developed in China. For liquid transportation: water supply, drainage, sewage treatment engineering, mud transportation, marine water transportation. For gas transmission: gas, steam and liquefied petroleum gas. For structure: as pile driving pipe and bridge; Pipes for wharf, road and building structures, marine piling pipes, etc.
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