Hot-dip galvanized steel pipe is hot-dip galvanized surface of the welded steel pipe. Hot dip galvanized steel coating uniform, strong adhesion, corrosion resistance, long service life. Is widely used in construction, machinery, coal, chemicals, railway vehicles, automobile industry, roads, bridges, containers, sports facilities, agricultural machinery, petroleum machinery, prospecting machinery and other manufacturing industries.
Hot dip galvanized steel pipe should be how to install it? Next, Xiaobian take you to understand the galvanized steel pipe installation process.
First, according to the caliber, the specific circumstances of the pipe, use the appropriate connection
1, welding: According to the progress of the scene into the installation at an appropriate time. Pre-fixed bracket, according to the actual size, draw a sketch, prefabricated pipe, pipe fittings on the pipe as much as possible, weld dead mouth. Pipe pre-straightening, the installation should be closed to open the interruption, the design requirements plus casing in the installation process plus casing, according to the design and equipment requirements, set aside a good interface, plugging, ready for the next step of the trial Press work.
2, thread connection: Pipe thread processing sets of threading machine into. 1/2 "- 3/4" pipe can be used for manual threading. After the threading is completed, the nozzle should be cleaned to keep the nozzle smooth. The length of the thread break shall not exceed 10% of the total number of threads. Connection should be solid, root no linseed phenomenon, the root exposed thread should not be more than 2-3 buckle, the exposed part of the thread well preserved.
3, flange connection: pipes and valves and other connections require flange connection. Flange can be divided into flat welding flange, butt welding flange, flange finished. Flange and tube centerline perpendicular to the nozzle shall not highlight the flange sealing surface. Tightening flange bolts should be used before the brush lubricant, to be symmetrical cross, sub-2-3 times tighten the screw exposed length does not exceed the screw diameter 1/2, the nut should be on the same side, the flange liner shall not protrude into the tube There must be no diagonal pad and more than two pads in the middle of the flange.
Second, anti-corrosion: Bright galvanized steel pipe brush silver two, dark hot dip galvanized pipe asphalt two.
Third, the laying of pipelines before the installation should be clean up the dirt, slag and other refuse to prevent rubbish fall into the pipe, the pipe has been installed, to be bandaged seal.
Fourth, the construction is completed, the entire system should be hydrostatic pressure test. Part of the pressure on the water supply: 0.6mpa, pressure drop within five minutes not more than 20kpa, as qualified.
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