A variety of pipe fittings, has brought us a great convenience. Among many pipe fittings, the use of push elbows, such as large-diameter stainless steel elbows and short radius elbows, is very common. However, there are many quality problems when using these elbows. Glenflange
1, excessive hardness Bending elbow hardness exceeded the standard, mainly due to forming heat treatment process problems, the solution is to use the right heat treatment process and then a heat treatment.
2, materials and processing defects arising push elbow on the safety of the device the most dangerous.Check up is also very troublesome. Defective factors are more and more complex, it has both the material itself defects and manufacturing process problems and heat treatment process caused by the defects of the incorrect.
3, uneven pipe wall thickness Push the elbow pipe wall thickness unevenness occurs mainly in the deformation of the largest parts of the pipe, such as elbow back wall thickness is thinner than other parts; nozzle and pipe body wall thickness range. According to the relevant national standards, inspection of such problems is often difficult to find with measuring tools such as calipers, and only the use of ultrasonic gages can be measured.