Civil Construction

The hot expanding steel pipe is hot expanded seamless pipes, which is relatively low density but the contraction of the strong steel pipe (seamless pipe) can be referred to as thermal expansion.

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.

ASTM A500 Structural Steel Hollow Section is a cold formed welded and seamless carbon steel structural tube for structural applications.

‌ASTM A795 is a standard specification for black and hot-dip galvanized welded and seamless steel pipe for fire protection service.‌