Steel-lined plastic anti-corrosion pipeline chemical industry uses one of the most widely used anti-corrosion equipment, but there are many anti-corrosion pipeline manufacturers. Because of the short construction time, the experience of inspection and production of plastic-lined pipe fittings is insufficient, resulting in more damage to the pipeline and pipe anti-corrosion layer. When there is no inspection experience, the existing electric spark tester can not be used to check the leak point, and the steel-plastic composite pipe is formed to operate with the disease, and the anti-corrosion layer is not damaged at all times, and the corrosion-resistant steel pipe forms a leaking event.
The anti-corrosion layer of steel-plastic composite pipe and pipe fittings is the simplest to break. The simplest leaking places are: the straight-angle part of the straight pipe flange, the central part of the long pipe, the joint branch of the tee, and the center of the elbow.
How to ensure the pass rate of steel-plastic composite pipe is 100%.
A. The existing manufacturer's EDM leak detector probes do not meet the requirements for anti-corrosion inspection in pipelines. The inspection of steel-lined plastic pipeline anti-corrosion layer is simple. The company's improvement method is to manufacture circular probes with nominal diameters of DN25-1000mm. set. The probe is surrounded by a stainless steel wire. The center is provided with a nut connection point. It is connected with a 3.5mm length of 10mm round steel and connected to the EDM probe. The round steel long rod must be covered with 15 plastic tubes to ensure safe operation. The probe extends into the steel-plastic composite pipe and slowly moves forward. If there is a breakage point, the size can be swept away.
B. Manufacture of different sizes, active turning probe, detailed manufacturing method: the plastic-lined pipe fittings are made of a moderately rigid length of 500mm, 20mm stretch spring, the head is surrounded by a spherical stainless steel wire, and the other end of the spring is welded. A probe with the same thread as the probe. This special probe can check the elbow tee. When inspecting, as long as the special probe is inserted into the steel-plastic composite pipe fittings and slowly advances, the active turning, active exploration, active alarm, and inspection are very ambitious. With the special probe for EDM, this strategy can be completed. We have to do: 100% of the steel-plastic composite pipe is not damaged when it leaves the factory. When the steel-plastic composite pipe is used, it has 100% no leakage point.
