Founded in 2005, Tianjin Holly Land Pipe Co., Ltd is dedicated in manufacturing of couplings and cutting threads of casing and tubing. Our modern factory is located in the big sea port city Tianjin, which is an core manufacturing base of steel pipes in China.
As one of prequalified suppliers of CNPC and CNOOC, we have always paid great attention to quality of products and our factory have get certificates API Spec 5CT, ISO 9001:2015, IDT ISO14001:2015, IDT ISO 45001:2018.
We have full production lines and test gauges for casing and tubing, including turning, boring, heat treatment, threading, phosphating and NDT test etc. Our tubing couplings range from 1.9" to 4 1/2" and our casing couplings range from 4 1/2" to 13 3/8".
Our CNC lathes can cutting API and premium connections for couplings, pup joints, casing and tubing and drilling tools from 1.9" to 13 3/8".
With dozens years of experience in OCTG industry, we also supply our customers with OCTG products with different sizes and specifications.