OCTG

DMH UNITED STEEL INDUSTRY is a leader in seamless pipe for petroleum casing, oil pipeline, structural seamless pipe and fluid in China and has won many honors over the years.
Insulation layer of oil casing selection of aluminum silicate centrifugal cotton composite material (also can choose other insulation materials), thermal insulation effect is good. Oil casing vacuum technology can be used to eliminate the outer wall of the coat pipe electrochemical corrosion caused by moisture, while further enhancing the insulation effect of the pipeline.

OCTG sliding bracket made of special low thermal conductivity materials, and the friction coefficient of steel is about 0.1, pipeline friction resistance is small. Oil casing fixed bracket, sliding bracket and the connection of the work of steel with a special design, which can effectively prevent the pipe heat bridge.

Directly buried pipes with a fully sealed hydrophobic structure, the drain pipe connected to the work of the low-point or design requirements of the location, no additional inspection wells. Oil casing elbow, tee, bellows compensator, valves, etc. are arranged in the steel casing, the entire working pipeline in a fully sealed environment, safe and reliable.

Oil casing with internal fixation technology can be completely canceled external fixed concrete pier, save costs and shorten the construction period.
There is a gap of about 10-20mm between the oil jacket insulation layer and the jacket steel pipe to play the role of further heat preservation and is also an extremely smooth tidal channel of the buried pipe so that the moisture drain pipe can really play a role of timely drainage The role of the signal pipe at the same time; or pumping it into a low vacuum, can be more effective insulation and reduce corrosion of the outer wall of the casing.
These are the above description of the structure of the oil casing, and now we should understand that the oil casing to ask what can work in harsh environments, right, so, we must strengthen the oil casing maintenance and care!

We all know that the oil casing needs to be welded when it is used. How much do you know about the welding tip? Let's understand together below.

Oil casing insulation adiabatic effect, usually can withstand temperature 120 ℃ high temperature, through the modification or combination with other insulation materials can be temperature 180 ℃, more suitable for heating pipe applications. So what should be done at the interface to make the insulation tube get better results, generally try to finish as much as possible in the ground first welding port, and then the pipeline fell in the buried channel, because of its flip difficult, the general welding need to dig Welding wells, oil casing for welding welds below the weld, that is, Yang welding.