Guanyu Tube has been serving the World since 2003.

ISO9001:2015, PED 2014/68/EU certified. Zhejiang Guanyu Steel Tube Co., Ltd is specialized manufacturer of High Quality Stainless Steel Tubes & Pipe, Nickel Alloy Tubing & Pipe in China. Production area covers an area of 35,000 square meters.  Annual output more than 10,000 tons.

We have built a complete quality management system and organization according to ISO 9001:2015 and PED 2014/68/EU. Quality control begin with an audit trail and continues from the point of steel melting. for the raw materials, we select the best quality raw material for our customers. right through to the finished product. This level of attention to detail extends throughout the design and manufacturing chain, all kinds inspection will be all though the producing process ensure the Stainless-Steel Pipe Tubing and Nickel Alloy Seamless Pipe, Copper Nickel Alloy Tubes, Brass Seamless Tubes finished in qualified. With destructive and non-destructive tests according to standard specification and customer’s special requirement, and including verification of performance by independent third-party test houses.

Our Principles

Save every Cost for our customers!

Fully support our customers and grow with them!

Select the best quality raw materials for our customers and bring them longer-term profits

Thanks to all of our clients, your trust drives us to overcome millions of difficulties and achieve today’s success!

Environment and Safety

Guanyu Steel Tube is ISO 14001 and OHSAS18001 Certified. We systematically seek to reduce the environmental impact of our business as well as the safety risks that our employees are exposed to. In particular with relation to the new conception of plants and the improvement of processes, we drive forward this optimisation process in terms of environmental impact and health and safety.

We already export our tubes to North America, South America, South Korea, Inida, South East Aisa, West Aisa, Europe, Australia.

Thanks to all of our clients, your trust drives us to overcome millions of difficulties and achieve today’s success!

Main Raw Material Supplier:

Yonxing Special Material  / BAOSTEEL / POSCO / Sandvik / Outokumpu / Nippon Steel & Sumitomo Metal

Mainly Producing & Testing Equipment List

Equipment Name	Detailed Description	Quantity (sets)
Cold Rolling Pilger Machine	LG0-20-HS LG60-H	12
Cold Drawing Machine Set	OD 3 – 530mm	12
Solution Annealing Furnace	CNG Controled by Computer 25 Meters	1
Bright Annealing Furnace	Nitrogen and Hydrogen	1
Pickling Tank	25 Meters 25000*1600*1000mm	4
Electric Resistance Heat Treatment	XL-21	1
Straightening Machine	LJ25, LJ110, LJ160	10
Eddy Current Test Machine	ECT-308E	1
Ultrasonic Test Machine	CTB-108	1
Hydrostatic Test Machine	Maximum 25 Meters	1
Direct Reading Spectrometry	M5000F	1
Portable Spectrometer	Hitachi X-MET8000 Smart	2
Rockwell Hardness Tester	HR-150DT	1
Vickers Hardness Tester		1
Universal Test Machine	WEW-600B 6-600KN	1
Metallurgical Microscope	4XI-II	1
Endoscope Test	DEPSTECH	1