Type A Stub End Short Pattern for Flange Joint Butt Weld Pipe Fittings

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

Supply Range

Material

Alloy Steel

ASTM A234 WP1, WP5, WP9, WP11, WP12, WP22, WP91

Stainless Steel

ASTM A403 WP304/304L/304H, WP316/316L, WP 309, WP310, WP317, WP321, WP347

Carbon Steel

ASTM A234 WPB, A860 WPHY42, WHPY52, WPHY60, WHPY65, WPHY70, A420 WPL 3 / 6 / 9.

Duplex Steel

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.

Zizi Engineering Co., Ltd is a leading industrial pipe fittings and flanges supplier for construction, petrochemical and oilfield customers.
We engaged in the manufacture and export of industrial pipe fittings for 9 years, our products have been sold to 37 countries around the world. We have a modern and professional manufacturing plant, established two warehouses near the harbor one after another. They are the base for our ability to offer high quality products and fast delivery.

Our products mainly are butt weld fittings, forged pipe fitings and forged steel flanges in stainless steel, carbon steel and alloy steel. They are produced according to ASME/ANSI American standards, DIN Germany Standards, JIS Japanese standards or as customer required. Those products are widely used in petrochemical industry, shipbuilding, oil field in ocean, electric power or city building.

Since we are founded, we are concentrated to be a professional global manufacture company with best products and service. Eventually we get some achievements after years of harding working and presistence. 

We will always insists on the managing objective of " quality first, service supreme, reasonable price". On the basis of continuously perfection the current products, our company persistently innovates upon the productive technology, provides vast customers with all kinds of superior new goods. We are willing to sincerely cooperate with friends from all walks of life to create a better future.