Stub Ends Type A & B Carbon Steel Butt Weld Fittings | Zizi Pipe Fittings https://www.zzfittings.com/products/stub-ends/ Top Steel Pipe Fittings Manufacturer Mon, 20 Oct 2025 01:38:35 +0000 zh-Hans hourly 1 https://wordpress.org/?v=6.9.1 224578074 Short Pattern Stub End https://www.zzfittings.com/product-details/short-pattern-stub-end/ Thu, 23 May 2019 08:29:46 +0000 https://www.zzfittings.com/?post_type=products&p=4248 Stub end are available in long and short pattern with s […]

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]]> Stub end are available in long and short pattern with standard of MSS SP-43, the normal size is 4″, 6″ and 8″ Sch 40 which are butt weld connection type.

It is essentially a piece of pipe, with one end flared outwards and the other prepared to be welded to a pipe of the same size, material and wall thickness. Stub end is one of buttweld fittings, the others are 45 degree elbow, 90 degree elbow, 180 degree elbow, straight and reducing tee, concentric and eccentric reducer, pipe caps.

Short Pattern Stub End Dimensions

Standard: MSS SP-43, ASME B16.9

Size: NPS 1/2 to 24 / DN 15 to 600

Thickness: Sch 10S, 20, STD, 40, XS, 80, 100, 160, XXS

Short Pattern Stub End

Nominal
Diameter		 Outside
Diameter		 Length Diameter Of
Lap
Nominal&Max		 R
DN NPS OD LP SP G A
Max		 B
Max
15 1/2 21.3 76 51 35 3 0.75
20 3/4 28.7 76 51 43 3 0.75
25 1 33.4 102 51 51 3 0.75
32 11/4 42.4 102 51 64 5 0.75
40 11/2 48.3 102 51 73 6 0.75
50 2 60.3 152 64 92 8 0.75
65 21/2 73 152 64 105 8 0.75
80 3 88.9 152 64 127 10 0.75
90 31/2 101.6 152 76 140 10 0.75
100 4 114.3 152 76 157 11 0.75
125 5 141.3 203 76 186 11 1.5
150 6 168.3 203 89 216 13 1.5
200 8 219.1 203 102 270 13 1.5
250 10 273.1 254 127 324 13 1.5
300 12 323.9 254 152 381 13 1.5
350 14 355.6 305 152 413 13 1.5
400 16 406.4 305 152 470 13 1.5
450 18 457.2 305 152 533 13 1.5
500 20 508 305 152 584 13 1.5
550 22 559 305 152 641 13 1.5
600 24 610 305 152 692 13 1.5

Material & Grades for Lap Joint Stub End

Stainless Steel Lap Joint Stub End

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

Carbon Steel Stub End

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

Alloy Steel Stub End Type A

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

Duplex Stainless Steel Short Stub End

ASTM A815 UNS S 31803, 32205, 32550, 32750, 32760

Types of Lap Joint Stub End

Type A

Type A stub ends are used for standard lap joint flanges. The lap thickness at the stub end is greater than or equal to the nominal thickness of the pipe wall. In addition, Type A has an outside corner radius to accept lap flanges. The inside corners are square. The lap usually has a machined serrated face.

Type B

Type B short ends are used as lap joint flanges for standard slip on flanges. The lap thickness of these short ends is greater than or equal to the nominal thickness of the pipe wall. In addition, the outside corner radius of Type B is small enough to accommodate a slip-on flange that can be used as a backup flange. The inside corners are square. The lap usually has a machined serrated face.

Type C

Type C stumps are available for standard lap joint flanges and slip-on flanges. It is flared with a rounded edge at the lap ID. If necessary, the radius can be squared. The lap thickness is 75% of the pipe wall. type C pipe is short enough to accommodate any spare flanges. type C laps are smooth and do not require machining.

You can view the exact specifications on our [Stub End Type A] product detail page.

Package of Carbon Steel Buttweld Fittings

  1. Blasting and Painting.
  2. Wrapping plastic foam.
  3. Packing pipe fittings into wooden cases.
  4. Stick shipping mark on the package.

Lap Joint Stub End Weights

Nominal  Size Sch10S Sch40S Sch80S
DN NPS Long Pattern Short Pattern Short Pattern Long Pattern Short Pattern Long Pattern
15
20
25		 1/2
3/4
1		 0.07
0.09
0.15		 0.09
0.12
0.25		 0.09
0.12
0.18		 0.12
0.16
0.32		 0.12
0.15
0.24		 0.16
0.21
0.43
32
40
50		 11/4
11/2
2		 0.19
0.22
0.35		 0.34
0.39
0.71		 0.25
0.31
0.52		 0.43
0.52
1.02		 0.33
0.43
0.73		 0.57
0.75
1.49
65
80
90		 21/2
3
31/2		 0.46
0.62
0.70		 0.95
1.22
1.36		 0.81
1.10
1.52		 1.60
2.11
2.55		 1.10
1.50
2.09		 2.22
2.98
3.65
100
125
150		 4
5
6		 0.94
1.30
1.75		 1.59
2.80
3.30		 1.80
2.25
3.59		 3.05
5.42
7.02		 2.58
3.60
5.76		 4.44
7.86
11.3
200
250
300		 8
10
12		 2.90
4.79
7.20		 4.95
8.50
10.9		 5.98
10.2
14.9		 10.6
18.4
22.8		 9.18
13.7
19.5		 16.2
24.9
30.2
350
400
450		 14
16
18		 7.95
9.50
11.1		 15.0
17.3
19.8		 15.8
18.9
22.0		 28.7
33.1
38.0		 21.6
25.2
29.3		 38.6
44.5
51.1
500
550
600		 20
22
24		 14.1
16.5
19.8		 25.9
28.2
35.0		 24.3
–
29.6		 42.3
–
51.2		 32.6
–
39.7		 56.8
–
68.8

Advantages of Stub Ends

  • Reduce the total cost of flanged joints for piping systems in high material grades.
  • Speed up the installation process, as the lap joint flange can be rotated to facilitate the alignment of the bolt holes.

Inspection of Carbon Steel Pipe Fittings

Check the marking. Such as name, size, schedule, grade, standard and Heat No.

Measure the dimensions. Such as outside diameter, thickness, height or length.

Ends of Short Type Stub End

  • Beveled Ends
  • Squared Ends
  • Flanged Ends
  • Grooved Ends
  • Threaded Ends

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]]> 4248 Type A Stub End https://www.zzfittings.com/product-details/stub-end-type/ Thu, 28 Feb 2019 03:20:28 +0000 https://www.zzfittings.com/?post_type=products&p=3246 Stub End Supplier Type A  Stub End is one type of butt […]

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]]> Stub End Supplier

Type A  Stub End is one type of butt weld pipe fittings, and always supplied with lap joint flanges, they are in variety of dimensions and materials. Why choose us? International manufacturing standards and experienced production, and the most is ISO certified manufacturer. So we will check and keep every piece of products that have quality assurance.

Furthermore, our warehouse is located in Shanghai so that we can ship your goods as soon as possible.

Stub End and Lap Joint Flange

Stub End Type A is most suitable for use with standard lap joint flanges. It has outside corner radius to receive lap joint flanges, and the inside corner is square. Stub ends are not contact with fluids conveyed by the pipeline. To reduce the total weight and cost, so you can use carbon steel stub end with stainless steel lap joint flanges.

MSS-SP-43 also covers other stub end types, they are suitable for different flanges.

Stub End Type

Stub End Type

Material Grades of MSS Lap Joint Stub Ends

Carbon Steel Stub End

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

Stainless Steel Fittings

ASTM A403 WP304/304L, WP304H, WP316/316L, WP310, WP317, WP321, WP309

Alloy Steel Pipe Fittings

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

Duplex Steel Pipe Fittings

ASTM A815 UNS S31803, S32205, S32550, S32750, S32760

MSS Type A Stub End Dimensions

Standard: MSS SP-43

Size Range: 1/2″ to 24″ / DN15 to DN600

Thickness: Sch 10s, 20, STD, 40S, 80S, 160, XXS

Type: Long Pattern and Short Pattern Stub End

Length: Standard Length or customized length.

Package of Stainless Steel Buttweld Fittings

We marked Stainless Steel Stub Ends with Material Grade, Lot No, Size, Standard and Thickness. Our workers will pack ASTM A403 WP316L Type A Stub End into wooden cases with protection.

Clear labels are tagged on the outside of the package for easy identification of the quantity and product I.D.

Additional Services

Commercial Invoice

Packing List

Bill of Loading

Certificate of Origin

Mill Test Certificate

Shipping Service.

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