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Why should pipelines be pickled, degreased and passivated?
It is mainly aimed at steel pipes, which are prone to corrosion reactions, and there is a certain hidden danger to equipment damage after corrosion. After removing all kinds of oil, rust, scale, welding spots and other dirt, it can greatly improve the corrosion resistance of steel. If there are d...Read more -
Three processes for forging pipe fittings
Three processes for forging pipe fittings 1.Die forging For small size pipe fittings such as socket welding and threaded tees, tees, elbows, etc., their shapes are relatively complicated, and they should be manufactured by die forging. The blanks used for die forging should be rolled profiles, su...Read more -
Straight seam steel pipe expansion technology
Straight seam steel pipe expansion technology 1. Preliminary rounding stage. The fan-shaped blocks are opened until all the fan-shaped blocks are in contact with the inner wall of the steel tube. At this time, the radius of each point in the steel tube within the step range is almost the same, an...Read more -
Large-diameter steel pipe forming method
Large-diameter steel pipe forming method 1. Hot push system expansion method Pushing and expanding equipment is simple, low-cost, easy to maintain, economical and durable, flexible product specifications change, if you need to prepare large-caliber steel pipes and similar products, only need to a...Read more -
Characteristics of pipeline non-destructive testing
Characteristics of pipeline non-destructive testing 1.The characteristic of non-destructive testing is that it can be tested without damaging the material and structure of the test piece. However, not all items and indicators that need to be tested can be non-destructive testing, and non-destruct...Read more -
Seamless steel pipe and seam steel pipe
The seam steel pipe and seamless steel pipe are divided according to the processing form. The seam steel pipe is generally welded. The seamless steel pipe has two methods of cold drawing and hot rolling. The carbon steel pipe is in terms of material, and the galvanized pipe is the surface of the ...Read more