Lap joint pipe flanges slide directly over the pipe and are most commonly used with stub end fittings. A pipe is usually welded to the Stub End and the Lap Joint pipe flange is free to rotate around the stub end. The benefit of this is that there will not be any issues with bolt hole alignment. Lap Joint pipe flanges are often used for applications that require frequent dismantling.

standards:

GB: GB / T9112-2000 (GB9113 · 1-2000 ~ GB9123? 4-2000)

American Standard: ANSI B16.5 Class 150, 300, 600, 900, 1500 (WN, SO, BL, TH, LJ, SW)

JIS: 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)

Ministry of Chemical Industry standards: HG5010-52 ~ HG5028-58, HGJ44-91 ~ HGJ65-91

Flange standard: HG20592-2009 (PN series) \ HG20615-2009 (Calss series)

Mechanical standards: JB81-59 ~ JB86-59, JB / T74-1994, JB / T79-94 ~ JB / T86-94

Pressure vessel standard: JB4700-2000 ~ JB4707-2000, JB1157-82 ~ JB1160-82 B16.47A / B B16.39 B16.48