The production process of rubber-lined pipes is as follows:
- Cut and weld connecting flanges for pipes or fittings according to the data size required by users
- The welded steel body shall be inspected, and the dimensions shall be accurate, and the weld seam shall be smooth and full. After passing the inspection, it shall be sent to blasting and sandblasting to remove rust.
- After sandblasting is completed, apply glue to the pipe body. The glue for the rubber-lined pipe should be painted 4 times before the glue board can be pasted. Each layer of glue should be separated by more than 8 hours (depending on the weather conditions). It can be seen that the process of rubber-lined pipes is complicated and the production cycle is long, all of which are manually operated.
- After the glue is applied at this moment, tailor the production technology of rubber-lined pipes of the desulfurization system of the power plant according to the size of the pipe body.
- The temperature of the soldering iron should be strictly controlled when the hot-melting method is used in the lining method, generally 100-200℃. When soldering glue, the soldering iron should not stay on the rubber plate, and the soldering glue should start from the middle to drive out the bubbles around. When the bubbles are found in the soldering glue, they should be punctured with a needle in time, the gas should be shaken off, and then compacted with a soldering iron. Before vulcanization, the lining equipment should be inspected, and problems should be dealt with in time. Vulcanization The vulcanization method is selected according to the size of the equipment and the type of rubber lining. Based on the quality and economical point of view of the lining, the vulcanization method of the rubber lining should be considered first. The quality control of the finished product should check the hardness of the adhesive layer and the electric spark to check the lining layer for leakage. If so, it should be repaired.
- After the rubber-lined pipes are all made, vulcanization can be carried out. The vulcanization temperature is controlled at 150 degrees to 180 degrees, and the pressure is controlled at 4MPa. After 8 hours of continuous cooling, it will gradually cool down and wait until the temperature is completely lowered. Grinding and inspection are carried out, and after all the processes are completed, it can be delivered to the user.