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Payment Type: L/C,T/T
Transportation: Ocean,Land,Air,Express
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Model No.: ASTM A403 WP316L
Brand: YuHong Group
Place Of Origin: China
Shape: Equal
Product Name: Stainless Steel Fitting Stub End
Specification: ASTM A403
Material: WP316L
Type: TYPE A
ASTM A403 WP316L Stainless Steel Pipe Fitting Stub End Type A
What is stub end in piping?
Used in conjunction with a backing flange, a Stub End is, essentially, a short length of pipe with one flared end and one square-cut end, which is welded to a pipe of the same NPS, material grade and schedule. The combination of a Stub End and a backing flange is generally used as an alternative to a standard flange.
What is the purpose of stub end?
Essentially, stub ends allow to minimize the weight of high-grade material in stainless, duplex, and nickel alloy piping, saving costs. Of course, the bigger the diameter and the class of the flanges, the higher the saving!
Stub End Types
Stub end are offered in three different ways, type A, B and C. Type A and B stub end are similar to forged fittings, such as elbows and tees, and type C stub end are made in customized sizes.
Type A
The type A stub end is used for standard lap joint flange. The lap thickness on the stub end is greater than or equal to the nominal thickness of pipe wall. In addition, the outer corner radius of the type A can receive the lap joint flange. The inside corner is square. Lap usually has a machined serrated face.
Type B
The type B stub end is used for standard slip on flanges as lap flanges. The lap thickness on these short ends is greater than or equal to the nominal thickness of pipe wall. Also, the outer corner radius of type B is small enough to receive the slip o flange that can be used as a backup flange. The inner corner is square. Lap usually has a machined serrated face.
Type C
The type C stub end can be used for standard lap joint flange and slip on flange. It is flared leaving a rounded edge at the inside diameter of the lap. If necessary, the radius can be made closed to a square. The lap thickness is 75% of the pipe wall. The type C is very short enough to accommodate any backup flange. The lap joint on type C is smooth, and it is not machine.
Common Types and Lengths
Stub ends are usually manufactured in two ways, Type A and Type B. They are available in two standard length, long (ANSI) or short pattern (MSS).
Schedule 5s and 10s stub end are usually offered in short lengths, and long lengths are available on special order. Schedule 40s stub end are supplied in either short or long lengths.
Stub End Benefits
a. Easy to prepare(does not require cut faces to be parallel or perfectly flat)
b. Can be formed between two dissimilar metals, such as aluminum and copper.
c. Accommodates different thickness (thinner piece must be welded on top), thin material such as diaphragms and foils can be connected
Industrial Applications
Stub end is widely used in the petroleum, chemical, power, gas, metallurgy, shipbuilding and construction industries. It is made from high quality raw materials, and available in a variety of sizes and designs.
316L Stainless Steel Fitting Chemical Composition
| Chemical Composition | C | Mn | P | S |
| ≤0.03 | ≤2.00 | ≤0.045 | ≤0.03 | |
| Si | Cr | Mo | Ni | |
| ≤0.75 | 16.00~18.00 | 2.00~3.00 | 10.00~14.00 |
| Selling Units | : | Piece/Pieces |
|---|---|---|
| Package Type | : | Ply-Wooden Case or Pallats |
Packaging: Ply-Wooden Case or Pallats
Productivity: 10-20 Tons Per Month
Transportation: Ocean,Land,Air,Express
Place of Origin: China
Supply Ability: According to Clients' Request
Certificate: ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
HS Code: 7307230000
Payment Type: L/C,T/T
Incoterm: FOB,CFR,CIF,EXW,DDP,Express Delivery
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