Hunakalia

Stub ends are available in two different patterns:

• the short pattern, called MSS-A stub ends
• the long pattern, called ASA-A stub ends (or ANSI length stub end)

Stub ends are available in three different types, named “Type A”, “Type B” and “Type C”:

• The first type (A) is manufactured and machined to match standard lap joint backing flange (the two products have to be used in combination). The mating surfaces have an identical profile to permit a smooth loading of the flare face
• Stub ends type B are have to be used with standard slip-on flanges
• Type C stub ends can be used either with lap joint or slip-on flanges and are manufactured from pipes

1.Reduces the overall cost of the flanged joint

Generally, the lap joint flange is of a lower grade than the material of the stub end and the pipework, thus saving the total weight of high-grade material used for the flanged joint.

Example:

For an SS316 pipe, instead of using a full 316 welding neck flange, a combination of an SS316 stub end and a carbon steel lap joint flange would do the same exact job, but the total weight of SS316 material would be lower, and the cost as well.

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!

2.Facilitates the installation of the flange

The lap joint flange can be rotated on the pipe and simplify the alignment of the bolt holes of the mating flanges

Detailed photos

1. Bevel end as per ANSI B16.25.

2.  Without lamination and cracks

3. Without any weld repairs

4. Surface treatment can be pickled or CNC fine machined. For sure, the price is different. For your reference, pickled surface is cheaper.

Stub ends can be ordered with different ends finishing:

• Beveled Ends
• Squared Ends
• Flanged Ends
• Grooved Ends
• Threaded Ends (Male Only)

1.Carbon Steel:A234 WPB Grade B

2. Stainless Steel:304/304L,304H,316/316L,316H,317L,904L,309S/H,310S,321,6XN,20CB,347,254SMO

3.Duplex /Super Duplex:2205,Zeron 100,2507,410

4.Nickel Alloys:HC22,HB-3,HG3,HX,HC2000,HC276,NCI,NC,N,NL,NCMC,NICMC,NIC10,NIC11

Marking

Various marking work can be on your request. We accept mark your LOGO.

Inspection

1. Dimension measurements, all within standard tolerance.

2. Thickness tolerance:+/-12.5% , or on your request

3. PMI

4. PT, UT,X-ray test

5. Accept Third party inspection

6. Supply MTC, EN10204 3.1/3.2 certificate, NACE

Packaging & Shipping

1. Packed by plywood case or plywood pallet as per

2. we will put packing list on each package

3. we will put shipping markings on each package. Markings words are on your request.

4. All  wood package materials are fumigation free

Pipe fittings are crucial components in the piping system, used for connection, redirection, diversion, size change, sealing or controlling the flow of fluids. They are widely applied in fields such as construction, industry, energy and municipal services.

Key Functions: It can perform functions such as connecting pipes, changing flow direction, dividing and merging flows, adjusting pipe diameters, sealing pipes, controlling and regulating.

Application Scope:

• Building water supply and drainage: PVC elbows and PPR tris are used for water pipe networks.
• Industrial pipelines: Stainless steel flanges and alloy steel elbows are used to transport chemical media.
• Energy transportation: High-pressure steel pipe fittings are used in oil and gas pipelines.
• HVAC (Heating, Ventilation, and Air Conditioning): Copper pipe fittings are used to connect refrigerant pipelines, and flexible joints are used for vibration reduction.
• Agricultural irrigation: Quick connectors facilitate the assembly and disassembly of sprinkler irrigation systems.