Common Process Inspection Procedures For Stainless Steel Seamless Elbow Fittings

Stainless Steel Weld Elbow what are the common process inspection procedures? Below, I will introduce them to you in detail:

1. Pipe bending test: bend the sample to a regular degree at the center of the grooved bend to check the ability of the elbow to withstand bending plastic deformation and show its defects;

2. Pipe flattening test: flatten the metal pipe to a regular standard to check its plastic deformation ability and show its defects;

3. Pipe expansion test: press the top of the regular taper into one end of the metal pipe to expand the diameter evenly to the regular standard to check the ability of the elbow to radially expand plastic deformation and show its defects;

4. Repeated bending test: clamp one end of the sample. Repeated reverse bending of 90 degrees on the cylindrical surface of the regular radius is carried out to check the metal's ability to withstand repeated bending and show its defects;

5. Upsetting test: hammer or forge the sample of the regular standard. A test to check the ability of alloy steel elbows to accept plastic deformation of upsetting at room temperature or hot conditions and to show its defects. The upsetting test conducted at room temperature is called room temperature upsetting test, also known as cold upsetting test. The upsetting test conducted under hot conditions is called hot upsetting test;

6. Pipe curling test: Press the top of a regular shape into one end of the metal pipe to make the pipe wall uniformly roll to a regular standard, and check the ability of the pipe wall to accept plastic deformation of external rolling and show its defects;

7. Pipe hydraulic test: The alloy steel elbow manufacturer fills the metal pipe with water or regular liquid, and accepts a regular pressure within a corresponding time to check the quality and strength of the elbow and show its defects;

8. Hardenability: refers to the ability of steel to accept quenching after austenitization, or the tendency of austenite to change to martensite, which is often described by the depth of the hardened layer. The hardened layer refers to the distance from the surface to the semi-martensite layer. For alloy structural steel, the method for checking hardenability is mainly the standard structural steel end quenching test method in my country;

9. Machinability: The performance of elbow materials when processed with cutting tools. When cutting or grinding, it is easy to achieve a relatively good surface processing accuracy, and the tool is not easy to wear, the chips are easy to fall off, and the cutting force is small, which all indicate that the metal material has good machinability;

10. Bending test: Use a standard bending center to bend the sample to a regular degree to check the ability of the metal to withstand bending plastic deformation and reveal its defects. Generally, the bending center diameter standard and bending angle and the requirements for the surface of the bending part should be specified.