GB/T3091-2015 Galvanizing Steel Pipes
As a leading supplier and manufacturer in China, GNEE Steel provides cost-effective nickel-based alloy products.
- Send E-mail: ss@gneesteel.com
Gnee Super Alloy (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of gb/t3091-2015 galvanizing steel pipes in China. If you're going to wholesale high quality gb/t3091-2015 galvanizing steel pipes made in China, welcome to get free sample from our factory. Good service and reasonable price are available.
1. Brand and chemical composition
The grade and chemical composition of the steel used for galvanized steel pipes should comply with the grade and chemical composition of the steel used for black pipes specified in GB/T3091.
2. Manufacturing method
The method of manufacturing the clarinet (furnace welding or electric welding) is chosen by the manufacturer. Galvanizing adopts hot dip galvanizing method.
3. Threads and pipe joints
(a) For galvanized steel pipes delivered with threads, the threads should be machined after galvanizing. Threads should comply with YB 822.
(b) Steel pipe joints shall comply with the provisions of YB 238; malleable iron pipe joints shall comply with the provisions of YB 230.
4. Mechanical properties The mechanical properties of steel pipes before galvanizing should comply with the regulations of GB 3091.
5. Uniformity of galvanized layer Galvanized steel pipes should be tested for uniformity of galvanized layer. The steel pipe sample shall not turn red (copper-plated color) when immersed in copper sulfate solution for 5 consecutive times.
6. Cold bending test: Galvanized steel pipes with a nominal diameter not larger than 50mm should be subjected to cold bending test. The bending angle is 90°, and the bending radius is 8 times the outer diameter. There is no filler during the test, and the welding seam of the sample should be placed on the outside or upper part of the bending direction. After the test, there should be no cracks or signs of zinc layer peeling off on the sample.
7. Hydraulic pressure test The hydraulic pressure test should be carried out on the black pipe, and eddy current flaw detection can also be used instead of the hydraulic pressure test. The size of the test pressure or eddy current flaw detection comparison sample should comply with the regulations of GB 3092. The mechanical properties of steel are important indicators to ensure the final performance (mechanical properties) of steel.
FAQ
Q: Can you accept customization?
Yes. If you have special requirements on products or packages, we can do customization for you.
Q: Can you accept trail orders?
Gemerally our MOQ is 1 ton. But if you want to place a trail order as the beginning of our cooperation, we can accept smaller quantity at frist. Surely we will have further and longer partnership after the beginning.
Q: What are the advantages of your company ?
A: We have many professionals, technical personnel, more competitive prices and best after-dales service than other stainless steel companies.
Q: How many coutries you already exported ?
A: Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt, Turkey, Jordan,India, etc.
Hot Tags: gb/t3091-2015 galvanizing steel pipes, China gb/t3091-2015 galvanizing steel pipes suppliers, 420J1 420J2 316 Stainless Pipe, 410 Stainless Steel Pipe, SS410 Stainless Steel Pipe, Slip On Flanges, Inconel 625 Alloy Steel Plate, 1 4509 1 4510 Pipes And Tubes
You Might Also Like
Send Inquiry