Investigation method of shrinkage of metal pipes
Metal pipe shrinkage is a commonly used technique in many pipeline materials. It is based on the process of using the thermal energy generated by the heating element to a certain temperature, coupled with the closing elements extrusion lock, so that the pipe material caused by the plastic deformation and shrinkage of the surrounding environment. The purpose of the shrinkage is to firmly fix the pipe on to the surrounding material, and make the seal more compact and durable.
The test method of the shrinkage performance of metal pipes has been explained in the GB 243-82 standard. The test consists of two parts, the first is the test of the mechanical characteristics of the shrinkage, and the second is the test of the shrinkage characteristics. The mechanical properties of the shrinkage include the tensile strength, the elongation tolerance, the hardening degree, the elasticity and the plasticity, and the shrinkage characteristics include the ring pressure, the radial shrinkage and the heat radiation performance. The test is as follows:
1. Tensile strength test. The tensile strength test is the most important parameter of the shrinkage performance of the metal pipes. It refers to the tension that the pipe can bear before breaking under the loading force of the stretching test stand. The scope of the test is based on the GB 243-82 standard.
2. Elongation tolerance test. This test is used to evaluate the plastic and elastic characteristics of the pipe material. The test is based on the GB 243-82 specification and should adjust the environmental temperature and other conditions to ensure the accuracy of the test results.
3. Hardening test. This test is used to evaluate the hardening degree of the pipe material, that is, the resistance of the material to external force and temperature changes. The test is based on the GB 243-82 standard, and should be conducted in the environment with a specific temperature.
4. Radial shrinkage test. This test is used to measure the shrinkage performance of the pipe material under compression. The test is based on the GB 243-82 standard and should adjust the environmental temperature and other conditions to ensure the accuracy of the test results.
5. Heat radiation performance test. This test is used to measure the degree of heating and cooling of the pipe material during the shrinkage, and is based on the GB 243-82 standard.
6. Ring Pressure Test. This test is used to measure the shrinkage pressure of the pipe material when the heat shrink tube is in place. The test is based on the GB 243-82 standard and should adjust the environmental temperature and other conditions to ensure the accuracy of the test results.
In conclusion, the test of the shrinkage performance of metal pipes should closely follow the GB 243-82 standard. All the test stages should be carried out in corresponding environment conditions, and all the test parameters should be recorded and analyzed to ensure the accuracy of the test results.
