About US

Zhejiang Guanyu Steel Tube Co., Ltd has been serving the World since 2003. It has passed the China Special Equipment Manufacturing License TS-A and B, EU Pressure Equipment Directive PED 2014/68/EU material certification, ISO9001 International Quality Management System Certification, ISO14001 environmental management system certification, ISO 45001 occupational health and safety management system certification

Zhejiang Guanyu Steel Tube Co., Ltd is a 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 capacity more than 10,000 metric tons.

Guanyu Tube have built a complete quality management system and organization according to ISO 9001:2015 and PED 2014/68/EU. Quality control begins 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 of inspection will be all though the producing process ensure the Stainless Steel Tubes/Tubing/Pipe and Nickel Alloy Tubes/Tubing/Pipe finished in qualification. 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.

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

Advantages of Guanyu Tube

• 1. Super high cost performance.
• 2. Stable and reliable quality.
• 3. Specializing in the production of stainless steel tubes for heat exchangers. Professional because of focus.
• 4. Can produce ultra-long stainless steel seamless tubes. Maximum Length is 60000mm.
• 5. Fast delivery time. We have 22 sets cold rolling mills and 5 sets cold drawing machines to ensure rapid completion of production and delivery.
• 6. Clean internal and external surfaces of stainless steel tubes.
• 7. Excellent straightness. For customers with special requirements, we will add a straightening step before shipping.

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.

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！

Main Raw Material Supplier:

Yongxing / TISCO / Baosteel / POSCO / Sandvik / Outokumpu / Nippon Steel & Sumitomo Metal

Our Main Products:

U bend Tube
BA Tube | AP Tube
Stainless Steel Reheater Tube Superheater Tubes
Condenser Tube
Heat Exchanger Tube
Super Duplex Pipe
Nickel Alloy Tube
Brass Seamless Tubes
Stainless Steel Hollow bar
Stainless Steel Oval Tubing
Stainless Steel Square Tubing
Stainless Steel Rectangular Tubing
Stainless Steel Capillary Tube
Stainless Steel Twisted Tube
Copper Nickel Alloys Tubes
Duplex Stainless Steel Pipe
Stainless Steel Hollow bar
Stainless Steel Mechanical Tube
Stainless Steel Hydraulic Tubing
Stainless Steel Instrumentation Tubing
Bright Annealing Stainless Tube
Seamless Stainless Steel Pipes
Corrugated Stainless Steel Tubing
Polishing Stainless Steel Pipe
Bright Annealing Stainless Steel Tube
Heat resistant Stainless Steel Tube
Welded Stainless Steel Pipe
Corrosion Resistant Stainless Steel Tube
Corrosion Resistance of Stainless Steel Tubes

Tubes and Pipes Size

OD: 1 – 530mm, WT: 0.5 – 65mm， Length maximum in 25000mm

Standard Specification:

Stainless Steel Pipe Specifications:
EN 10216-5; DIN 17456;DIN17458;DIN17459;
ASTM: A213/ASTM A312/ASTM A269/ASTM A789/ASTM A790/ASTM A511/ASTM A376;
ASME SA213/ASME SA312/ASME SA269/ASME SA789/ASME SA790/ASME SA511/ASME SA376;
JIS G3459, JIS G3463.
GOST 9940 GOST 9941

Nickel Alloy Pipe Specification:
ASTM B111, ASTM B161, ASTM B163, ASTM B165, ASTM B167, ASTM B338, ASTM B407, ASTM B423, ASTM B444, ASTM B619, ASTM B622, ASTM B626, ASTM B668, ASTM B677, ASTM B829
or Standards stipulated in the technical agreement.

Mainly Equipment List: