Technical requirements for steel pipes
This technical specification is suitable for the bidding for the procurement of steel pipe projects. 

Executive standards 
The steel pipe shall meet the following standards:Quality standard like Spiral Welded Submerged Arc Welded Steel Pipes for Urban Heating CJ/T3022-1993 or Technical Delivery Conditions of Oil and Gas Industry Transportation Steel Pipes GB/T9711.1-2017 should be implemented for spiral welded pipes.Seamless Steel Pipe for Fluid Transportation GB/T8163-2008 should be carried out as quality standards for seamless steel pipes.https://www.datangsteelpipe.com/