The finished stainless steel seamless elbows should be tested before leaving the factory and can only be used if they pass the test. So what exactly is tested?
1. Appearance: The appearance of stainless steel seamless elbow must be smooth, without defects such as oxide skin, scarring, folding, and separation.
2. Size: The size of stainless steel seamless elbow must comply with the standard. Use a vernier caliper to measure it and check it with the corresponding standard test form.
3. Hardness: The processing of stainless steel seamless elbows must comply with national standards.
4. End face beveling: Since most elbows are connected by welding, in order to improve the welding quality, the end faces of elbow pipe fittings are machined into a bevel shape, leaving a certain angle and a certain edge. The edge thickness and groove angle must be within the specified deviation range.
5. Supplementary inspection: Supplementary inspection is for some stainless steel seamless elbows with special requirements. Low-temperature toughness impact testing, elbow pipe fittings non-destructive testing, magnetic particle testing and some mechanical tests should be carried out.