Construction

The production process of DIN 1629 steel pipe supplied by GNEE includes heating of pipe billet, piercing, three-roller cross rolling or continuous rolling, tube stripping, sizing (or reducing), cooling, straightening, hydrostatic test (or flaw detection), marking and warehousing.

The manufacturing process of STPT 370 seamless steel pipe usually includes hot rolling or cold rolling. This kind of steel pipe has high strength, high pressure resistance and good corrosion resistance, so it is widely used in fields such as petroleum, chemical industry, electric power and construction.

Casing coupling is a short pipe applied in connecting two casing pipes which have threads. The pipe coupling has internal threads machined to match the external thread of the long joints of casing.

DIN 2394 precision steel tubes have the characteristics of high precision, high finish, good inner wall cleanliness, ability to withstand high pressure without leakage, no deformation when cold-bent, and no cracks when expanded or flattened.