ANSI-Certified Q195/Q235/Q345 Hot Rolled round Hollow Black Galvanized Steel Pipe Gi Tube for Building Materials API 5L Standard

Special-shaped steel pipes. The outer diameter of the hot-rolled seamless pipe is generally greater than 32mm, the wall thickness is 2.5-75mm, the diameter of the cold-rolled seamless steel pipe can be up to 6mm, the wall thickness can be up to 0.25mm, the outer diameter of the thin-walled pipe can be up to 5mm, the wall thickness is less than 0.25mm, and the dimensional accuracy of cold rolling is higher than that of hot rolling. Generally, seamless steel pipes are made of high-quality carbon-bonded steel such as 10.20.30.35.45, low-alloy structural steel such as 16Mn.5MnV or 40Cr.30CrMnSi.45Mn2.40MnB hot-rolled or cold-rolled. Seamless pipes made of mild steel such as 10.20 are mainly used for fluid transportation pipelines. Seamless pipes made of medium carbon steel such as 45.40Cr are used to make mechanical parts such as automobiles. Stressed parts of a tractor. Generally, seamless steel pipes should be used to ensure strength and flattening tests. Hot-rolled steel pipes are delivered in hot-rolled or heat-treated condition; Cold-rolled is delivered in a heat-treated condition.

A:Of course, we can provide customers with free samples and express shipping service to all over of the world. 

Q2.How can we guarantee quality? 

A:Always a pre-production sample before mass production;Always final Inspection before shipment.

Q3. Is your company a trading company or a manufacturer?

A: There is no doubt that we are a professional material manufacturer in China. 

Q4:What ports of shipment are there?

 A:Under normal circumstances, we ship from Shanghai, Ningbo ports, you can specify other ports according to your needs. 

Q5:What about product prices information?

A:Prices various according to periodic price changes of raw materials. 

Q6.Do you provide custom made Products service? 

A: Yes,if you have your own design , we can produce according to your specification and drawing.

Q7:How long does your delivery time take? 

A:In general, our delivery time is within 7-15 days, and may be longer if the quantity is extremely large or special circumstances occur. 

Q8:Can I go to your factory to visit? 

A:Of course, we welcome customers from all over the world to visit our factory.

Q9: How many countries have you visited? 

A: We have exported to the Middle East, Europe, America, Southeast Asia and other regions, and have signed long-term cooperation agreements with dozens of companies and regional agents. We have rich export experience, and we are familiar with different market demands and can help customers avoid a lot of trouble.