Detail Description Bulge Equal Coupling is made from stainless steel 304 Bulge connection. Bulge one circle ring at each end of the pipe, then cover it with a seal ring and closely connect with bulge nut After that, screw the nut tight, so that the seal ring and the pipe bulging ring avoid leaking The relevant development and production standard are of enterprise standards, higher than the state standard Relevant inspection and certification departments have issued report on the product safety, which is favorable for use Bulge connection is the patent product of our company as well as Zhejiang hi-tech product, being widely used in China