Mine plastic pipe

Mine coated plastic tube have a wide range of uses in our life, some of its processing method are as below:

1, nozzle grinding:after cutting, Angle grinding machine should be used to polish the nozzle plastic layer, its purpose is to avoid to make plastic layer in flange welding melt even burning causing pipe damages.Using the grinder to polish the nozzle plastic layer.

2, grinding processing:when flange welding is completed, we should use the Angle grinder to make the nozzle smooth level off, may leave pits but no welding slag.

3, flange welding, after grinding, welding machine should be used to weld single flange and pipe together.Before welding,monolithic flange holes of single flange shall be corrected to avoid dislocation phenomenon during the connection process.

4, plastic coated treatment: polishing finished, using oxygen, acetylene on the outside of the pipe to heat pipe, heating to appear partial melting phenomenon inside plastic layer, then technical workers will use plastic powder prepared for nozzle to evenly daub, pay attention to it must be fully daub, plastic coated flange plate to daub to check above water line.This process should strictly control the heating temperature, if the temperature is too high,it will have the air bubbles in the plastic coated process, if the temperature is too low,  plastic powder will melt incompletely in the process of plastic coated, the above conditions will appear plastic layer falling off phenomenon after putting into use, in the end part of pipeline, steel pipe will suffer corrosion damage.

5, cutting: according to the actual required pipe length, pipe should be cut by metal saws or toothless saw .When using water in the process of cutting welding, there must be protection methods for raw materials. On both ends of fracture in the location of the cutting made baffle catches fire heat resistant material cutting down when sparks and hot molten iron beans, protect the original plastic raw material layer.

6, pipe connection: After fill plastic , connect and install the pipes and pipe fittings , add rubber mat in the process of connection between the flange, and fasten the bolt to seal condition.