API5L GRA technique: Hot Rolled, hot rolled / cold drawn.
API5L GRA WT tolerance: WT +-12.5%
Chemical:C:0.17-0.24%,Si:0.17-0.37%,MN:0.35-0.65%,P:<0.035%,S:<0.035%,Cu:<0.25%,Ni<0.25%,Cr:<0.25%
API5L GRA tensile strength: 390MPA
API5L GRA yield point: WT<16MM 245MPA, WT 16-30MM 235MPA
API5L GRA Elongation: 20
Other test: HY, ET according to request.
Marine API SPEC 5L Seamless steel tube for gas and oil are a sort of marine steel pipes certified by leading classification societies. They are designed for conveying gas, water, oil. The marine API line pipes are manufactured according to the standard API SPEC 5L. In addition the above-mentioned pipes, we are able to supply other line pipes in line with GB/T 9711.
Seamless steel tube production process, seamless steel pipe is mainly through the tension reducing to complete, tension reducing process is hollow material without mandrel continuous rolling process. To ensure the welding quality under the premise of pipe, pipe tension reducing process is to pipe the whole seamless pipe that is heated to 950 degrees Celsius above, then the tension reducing mill (tension reducing mill, a total of 24 times) rolled into a variety of diameter and wall thickness of the finished tube, the production process of hot rolling ordinary high frequency welded pipe seamless steel pipe and there is essential difference between microstructures and mechanical properties of the weld and the parent can be completely consistent by heating after multi pass through the tension reducing mill rolling and automatic control of the dimensional accuracy of steel (especially tube roundness and wall thickness of seamless steel tube is better than that of precision) the same seamless steel tube. In the developed countries, a lot of seamless pipes have been used in the pipe and boiler tubes. With the development of society, the situation that the domestic hot rolled welded pipe has gradually replaced seamless pipes has been formed.
We provide you a broad range of API5L GRA specifications: outer diameter range is 168.3 ~ 323.9 mm, wall thickness range is 5.2 ~ 28.83 mm. Of course, if you have any specific requirements, we can customize pipes for you. We are engaged in providing best quality products with reasonable price for our customers. If you trust us, we will build a pleasant cooperative relationship!
