5. Apply special roller slot machines notching GP steel pipe maintenance, while notching tube sections should be level, pipe and roll-section 900 slot machines only. Pressure trough should continue progressive, groove depth shall comply with the requirements in the following table; and using the whole week standard gauge measuring the depth of the groove. Such as shallow trench GP steel pipe application, should be adjusted before grooving machine for processing. Standard depth of the trench and the tolerance (mm) diameter deep groove tolerance ≤80 2.20 +0.3 100 ---- 150 2.20 +0.3 200 ---- 250 2.50 +0.3 300 3.0 +0.5 4, threaded joints of pipe exposed threaded number can not be too much. Threaded seal may not use lead Shantou flax. Anaerobic pipe sealant joints GP steel pipe installation, maintenance period of not less than 24H, shall not carry out pressure test 5 period, the hot water supply piping system should be lined with crosslinked polyethylene (pex) of plastic composite pipe and lined polypropylene (PP) of the tube. When the rubber seal, should be heat-resistant rubber seal Court. The cold water pipe must not be used for hot water pipe fittings pipes into the system. 6, buried plastic composite pipe pipeline should be a reliable anti-corrosion measures. In the pool (tank) water pipe section should not preclude the use of internal and external coating lance pipe and pipe fittings. Vent pipe, outlet pipe should be used inside and outside and the nozzle end of the plastic pipe. GP steel pipe installation | Jinling Industry (certified) | GP steel pipe provided by the Hebei Golden Link Industry Co., Ltd. Hebei Golden Link Pipe Industry Co., Ltd. (www.hbjinlingpipes.com/) Hebei Hengshui, chemical products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Jinling tube industry leadership with the staff warmly welcome all inquiries negotiations to create the Jinling tube industry a better future.