Why Choose Guanyu Tube?

• Qualification and Certification of Guanyu Tube
• Production Equipment List of Guanyu Tube
• Testing Equipement List of Guanyu Tube
• Quality Control System of Guanyu Tube
• Service Range and Procedure of Guanyu Tube

Guanyu Tube supplies high quality tubes and offers excellent service to our customers. Our customers are at the centre of what we do!

Before-Sale Service

Feedback the customer inquiries within 24 hours. Focus on customers’ requirements, careful analysis, and fully communicate with customers. Offer technical consulting service to the user for selecting proper Stainless Steel and Nickel Alloy material grade. Samples offered for free, until our customer is completely satisfied.

Service During Producing

Select the best quality stainless steel pipe material. From Yongxing / BAOSTEEL / TISCO / Sandvik / Outokumpu.

Manufacture the Stainless Steel Tubing and Nickel Alloy Tubes strictly according to the MPS and Specification. Supervise the Process of Production, ensure the delivery on time. Report the Stainless Steel Tubing Production Status Report Weekly by E-mail.

Main Testing Terms and Production Procedure:

• 1. Heat Treatment with Solution Annealing and Pickling / Bright Annealing
• 2. Cutting to required length and deburring
• 3. Chemical Composition Analysis Test With 100% PMI by Hitachi X-MET8000 Smart Portable Spectrometer and One tube from each heat by Direct Reading Spectrometer
• 4. Visual Test and Endoscope Test for Outside Surface and Inside Surface Quality according to ASTM A1016 / ASME SA 1016
• 5. 100% Hydrostatic Test according to ASTM A1016 / ASME SA 1016 and 100% Eddy Current Test according to ASTM E426
• 6. Ultrasonic Test according to ASTM E213 subject to the MPS (Material Purchase Specification)
• 7. Mechanical Tests includes Tension Test, Yield Strength Test, Elongation according to ASTM A370 / ASME SA 370, Flattening Test, Flaring Test, Hardness Test according to ASTM A999 / ASME SA 999
• 8. Impact Test subject to Standard request
• 9. Grain Size Test according to ASTM E112 and Intergranular Corrosion Test according to ASTM A262 Practice E / Practice C
• 10. Ultrasonic Measuring of Wall Thickness
• 11. Surface Roughness Test if necessary.

Marking & Packing

• Marking according to MPS and Specification.
• Stainless Steel Tubes Ends with Caps according to Purchase Order
• In Seaworthy Wooden Cases With Plastic Paper protect
• In Plywood Cases With Plastic Paper Protect
• Iron Racks Package
• Hexagonal packing in Bundles

Service During Shipment

Ensure the stainless steel pipe and Nickel Alloy Seamless tubing with safe and proper package Ensure the delivery time according the client’s requirementEnsure the shipment information be aware by client in time

After-Sale Service

Frequently have a good communication with our customers. Regularly visit our customer company. Have a consultation with the end user for feedback suggestions. Improve the quality constantly so as to meet the requirements of our customer.