Type A Stub End Short Pattern for Flange Joint Butt Weld Pipe
Type A Stub End
Type A Stub end is used with standard lap joint flanges, so it also
called lap joint stub end. Its lap thickness is greater than or
equal to the thickness of pipe wall. There are two types of stub
ends: Short pattern and long pattern. Short pattern also called
MSS-A stub end, and long type called ASA-A stub end or ANSI length
stub end. The main difference between them is their length.
Lap Joint Stub End Dimensions
|Standard||MSS SP-43, ASME B16.9, GB/T 12459|
|Diameter||NPS 1/2” to 24”, DN15 to DN600|
|Thickness||Sch 10S, 40S, 80S|
|Type||Type A, Type B, Type C Stub End|
|Pattern||Long Pattern and Short Pattern|
ASTM A234 WP1, WP5, WP9, WP11, WP12, WP22, WP91
ASTM A403 WP304/304L/304H, WP316/316L, WP 309, WP310, WP317, WP321,
ASTM A234 WPB, A860 WPHY42, WHPY52, WPHY60, WHPY65, WPHY70, A420
WPL 3 / 6 / 9.
ASTM A815 UNS S 31803, 32205, 32550, 32750, 32760
Copper & Nickel Alloy
NICKEL 200,NICKEL 201, MONEL 400, INCONEL825, INCONEL 600, INCONEL
601, INCONEL 625, HASTELLOY C276, C70600, C71500
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
Inspection of Buttweld Fittings
The inspection is operated according to ASME B16.9
1. Check the surface
Marking includes size, material, standard and Lot No. Be sure they
are correct and clear.
Touch and visual check the surface to ensure it is smooth and even.
2. Measure the size
Measure diameter, length, radius.
Confirm the sizes are in tolerance.
3. Tolerance for Lap Joint Stub End
Approve third party inspection
Third parties such as BV, SGS, LR, DNV, ABS.
Offer stamped Mill Test Certificate.