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.

Zizi is China leading manufacturer and exporter of steel pipe fittings and flanges, we offer buttweld fittings, socket weld fittings, threaded fittings and forged flanges in best price.

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.

Buttweld Fittings Manufacturer

As leading manufacturer of lap joint stub end, we offer each clinets attentive service as follow

Fast Delivery

One Step Service

Competitive Prices

ISO Certificated Product

Quick Response

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.