Lap Joint Flange

Lap Joint Flange is a loose flange.The flange can be made by flanging,directly turning out or welding the ring.The advantage is that the flange deformation does not produce additional torque to the container or pipeline,which is convenient to manufacture.It can be made of materials different from the container or pipeline,which is convenient to save precious metals.The disadvantage is that the flange is thick.It is suitable for occasions where the vessel or pipeline is lined with brittle materials and the pressure is not high.

National standard

Gb/t9122-2010

American Standard

ANSI B16.5 class150,300,600,900,1500(WN,so,BL,th,LJ,SW)

Japanese standard

JIS 5K,10K,16K,20K(PL,so,BL,WN,th,SW)

German standard

Din2573,2572,2631,2576,2632,2633,2543,2634,2545(PL,so,WN,BL,th)

Other standards

Ministry of chemical industry standard:

Hg5010-52～hg5028-58,hgj44-91～hgj65-91,hg20592-97 series,hg20615-97 series

Ministry of machinery standard:

Jb81-59～jb86-59,jb/t79-94～jb/t86-94,jb/t74-1994

Pressure vessel standard:

Jb1157-82～jb1160-82,jb4700-2000～jb4707-2000 b16.47a/b b16.39 b16.48