How to distinguish between stainless steel seamless elbow and seam elbow? Mainly analyze from the aspects of appearance, wall thickness, quality certification, and pressure testing.
1. Appearance inspection: The inner and outer walls of the stainless steel seamless elbow are smooth without any welds; There are welds on the inner and outer walls of the welded elbow.
2. Wall thickness measurement: The wall thickness of the stainless steel seamless elbow is uniform; The wall thickness of a welded elbow may become thinner due to welding.
3. Quality certificate: Regular stainless steel seamless elbow manufacturers can provide quality certificates, including material certificates, pressure test reports, etc., to confirm whether it is a seamless elbow.
4. Pressure testing: Stainless steel seamless elbows have better pressure resistance than seamless elbows. The deformation of the elbow under high pressure can be observed through pressure testing to distinguish whether it is a seamless elbow.