duplex stainless steel 316L stub end lap joint flange ASME B16.5

1. Why use the lap joint flange?

• Lap joint flange can swivel around the stub end and pipe lining. When the piping system is assemble and disassemble frequently, it is better to use a Lap joint flange. It means the flange can work even the two flanges bolt holes are misalignment .
• In a corrosive situation, the flange joints need to be exchange very soon. To a lap joint flange, only the stub end is touch with the pipe and fluid , the backing flange no need to touch it . It means you could only replace the stub end , no need to replace the backing flange , so the lap joint flange can decrease the cost of the piping systems.
• The backing flange and the stub end is separated , so we can use two different materials for the two pieces. it can work for more complicated application.

2. duplex stainless steel 316L lap joint flange dimension

Dimensions Lap Joint Flanges & Stud Bolts ASME B16.5

NPS 1/2 - ID = 22.9 - r = 3

3. How to match lap joint flange and stub end?

Types: Lap Joint
Sizes: 1/2" - 36" +
Bores: S/5s - XXH
Pressures: 150 - 300 - 600
Alloys: Stainless - Carbon - Aluminum