What are the types of strength tests?
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This post was last edited by Hongxin Cao on 2009-8-5 at 19:33. When operating the equipment originally, strength tests need to be conducted; what are the common types of pressure tests? How many categories are there under each type? I’ve heard of an immediate pressure test; what does that mean?
There are generally two types: one is air pressure, which involves applying a pressure 1.5 times the designed pressure to the device or pipeline to be tested； The other is water pressure, whose punching pressure is 1.25 times the design pressure of the equipment and pipes.
This post was last edited by lxq700918 on 2009-8-3 23:17. Strictly speaking, the pressure test carried out while the vehicle is in operation cannot be considered a strength test; it can only be regarded as a leakage test. Generally, two methods are used: gas testing (usually air) and hydraulic testing; the choice depends on factors such as the components inside the equipment. If there are refractory layers or catalysts inside the equipment, hydraulic testing is preferred ； Conversely, a hydrostatic test should be employed. The pressure used for testing is generally the design pressure, with the maximum being the design test pressure.
1. Strength refers to a material’s ability to withstand external forces without being damaged (irreversible deformation is also considered damage). Depending on the type of force applied, it can be classified as follows: (1) Compressive strength – the ability of a material to resist compressive forces. (2) Tensile strength – the ability of a material to resist tensile forces. (3) Flexural strength – the ability of a material to resist bending forces. (4) Shear strength – the ability of a material to resist shear forces. 2. Stress testing is a mechanical testing method used to evaluate the mechanical properties of metallic and non-metallic materials, such as tension, compression, bending, shear, and peeling. It is particularly suitable for testing various physical and mechanical properties of materials like rubber, plastic sheets and pipes, profiles, plastic films, wires and cables, waterproof membranes, and metal wires.
Hydraulic testing or pneumatic testing; for certain special media, a gas-tightness test is also required