ASTM A234 WP91 Alloy Steel Pipe Fittings Lap Joint Stub End Sch 40 ASME B16.9

Lap Joint Flange With Stub End

Stub End is a short pipe with a flared outwards end at one end. The other end is prepared to be welded with pipes. It usually used with lap joint flange or other rotating back flanges. The flared end is sandwiched in the two flanges as gasket. Rotating back flanges can be lap joint flange or slip on flange. This combination can replace a welding flange and the flange can be replaced.

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Lap Joint Stub End Dimensions

Supply Range

Advantages of Alloy Steel Stub End

• Rust proof finish
• Zero breakage during operations
• Resistant high temperature
• Ensure tight joints
• Chemically insert
• Accurate size
• Continuous and smooth flow
• Low friction loss
• Smooth inner surface
• Convenience for the pipeline maintain and disassemble

ASTM A234 WP91 Properties

Chemical Composition

Mechanical Properties

ASME B16.9 Stub End Types

Short Pattern Stub End

Also know as MSS-A stub end, it means the length of stub end is relatively short.

Long Pattern Stub End

ASA-A stub end or ANSI length stub end, its length is longer than short pattern.

Type A stub end

Used with lap joint flanges

Type B stub end

Used with slip on flanges.

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