the installation of high pressure pipeline

The requirements of high pressure pipeline is similar to medium low pressure pipeline installation, but the high pressure pipeline installation is much more demanding and stringent provisions than medium low pressure pipeline. Therefore, besides strict requirements, the following requirements should still confirm.



The fittings, fasteners and valves that are used to install the high pressure gas pipeline should have passed the test along with the corresponding technical documentation  and kept properly transported to the site clearly marked and placed neatly. Before installation, check the inner and outer surfaces wipe clean and whether the foreign matter in the channel is smooth. Check the nozzle and gasket sealing surface roughness meets the requirements without affecting the sealing performance of the sealing surface scratches (esp. radial scratches), spots and other defects. Except the provisions of skimmed pipe, the tube mouth and gasket sealing surface should coat with oil or butter or white petrolatum to protect. Besides, high pressure tube inspection and approval, the provisions of skim pipes should be painted protected layer in order to protect the transfer agent graphite or molybdenum disulfide grease oil.

High pressure pipeline installation should use the official fixed pipe rack pipe and high pressure pipes. And pipe fittings design requirements should install a protective sleeve. When install the exposed high pressure flange pipe end, thread chamfer and gasket, don’t use a wire dipping, advance shall spout and mat coated with butter. The soft metal high pressure washer should be accurately placed in a sealed place. Flange bolts should be symmetrical tighten evenly, not over, after the bolt tightening. Two concentric flanges should be parallel, exposed on the outside of the nut should be 2-3 buckle, at least not less than 2 buttons, and each bolt length is consistent. During the installation process, don’t use strong pull, push, twist or modify the strong seals and other ways to compensate for the thickness of the manufacturer or installation errors. Pipe installation work continuously and as impossible to complete, should be promptly closed the open nozzle. And the meter sampling site on the pipe parts should be installed with the pipe.

When the high-pressure pipeline bend partial correction, the heating temperature must be controlled at below the critical temperature of the steel. After the pipeline system is installed, it shall conduct a comprehensive review of stamp mark on the pipe, If found leaking somewhere fight symbol, should make up time based on the original basis.