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Welded steel pipe & tube

Welded steel pipe (steel pipe manufactured with a weld) is a tubular product made out of flat plates, known as skelp, that are formed, bent and prepared for welding.

Knowledge of ERW line pipe

Off Line ERW pipe Inspection
Off Line ERW pipe Inspection
ERW pipe

Analysis on production process and performance of oil pipeline,which pointed out that the main reason for the lack of oil pipeline anti-rust performance and proposed oil pipeline coating process improvement, and the correct selection of a rust-proof varnish in order to achieve long-lasting anti-corrosion effect.

The basic requirements of the oil pipeline rust layer

The production process of the oil pipeline, the long-distance transport conditions and open dumps time, rust varnish should have the following properties: good construction performance, security, environmental protection, quick drying; bright, transparent film, does not cover Coding ID, do not cover up the steel pipe surface rusty state; oil pipeline to withstand wind, sun, rain and other environmental conditions, anti-rust layer should have good weather resistance; impact, bumps and impact damage during handling and transport of the oil pipeline, there factor, anti-rust layer should have good impact resistance; the operation of shipping, hot and humid zones, anti-rust layer should have good moisture resistance, salt spray resistance; in the cold region in winter and summer desert regions, the ambient temperature -30 to 60 ° C, anti-rust layer should have good temperature variability.

Coated tube is a preservative tube, spray anti-corrosion coatings prepared in the ordinary oil pipeline corrosion preventive coating are strong. Compared with the coating tubing spraying process, the coating process of the anti-rust layer of the oil pipeline is far too simple: the construction of the steel pipe surface pre-treatment; only spray an anti-rust paint, coating thickness is insufficient and uneven; coating drying insufficient coating strength is not enough, easy to destroy; the appearance of the coating thickness, leakage, adhesion did not examine the control.

It can be seen: the anti-rust layer of the oil pipeline to improve performance, optimize the production process, it is necessary to ensure that the coating quality.

 
ASTM A213 T11 Seamless alloy pipes
+ ASTM A335 alloy pipe
ASMT A333 Grade 6 seamless pipes
+ ASTM A333 Alloy pipe


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