ASME B16.9 Stub End

Description

Product Description ASME B16.9 Stub End

ASME B16.9 Stub End refers to a type of pipe fitting commonly used in piping systems. It is a short piece of pipe, typically with a flared end, used to connect a larger pipe to a flange or other fitting. The stub end is welded to the pipe and allows for easy connection to a flange using a backing flange or a threaded connection. It is typically made from materials like carbon steel, stainless steel, and alloy steel.

ASME B16.9 Stub End Dimensions

Long Stub End Dimensions

Product	Nom. Pipe Size	Dia (G)	Length (F), Short	Outside Dia (O.D.)	Sch 160, Inside Dia (I.D.)	Sch 160, Lap Thickness (t)	Schedule 160, Wall Thickness (T)	XX Strong Wall Approx. Weight	XX Strong Wall, Inside Dia (I.D.)
1 1/2″ Stubs Ends Long Type “A	1.5	2.875	2	1.9	1.338	0.281	0.281	2.98	1.1
1 1/2″ Stubs Ends Long Type “A”	1.5	2.875	4	1.9	0.15	0.15	1.49	1.5	0.2
1 1/4″ Stubs Ends Long Type “A	1.25	2.5	2	1.66	1.16	0.25	0.25	2.52	0.896
1 1/4″ Stubs Ends Long Types “A”	1.25	2.5	4	1.66	0.14	0.14	1.26	1.278	0.191
1″ Stubs Ends Long Types “A	1	2	2	1.315	0.815	0.25	0.25	1.76	0.599
1″ Stubs Ends Long Types “A”	1	2	4	1.315	0.133	0.133	0.88	0.957	0.179
1/2″ Stubs Ends Long Types “A	0.5	1.375	2	0.84	0.464	0.187	0.188	0.68	0.252
1/2″ Stubs Ends Long Types “A”	0.5	1.375	3	0.84	0.109	0.109	0.34	0.546	0.147
10″ Stubs Ends Long Types “A	10	12.75	5	10.75	8.5	1.125	1.125	–	–
10″ Stubs Ends Long Types “A”	10	12.75	10	10.75	0.365	0.365	54	9.75	0.5
12″ Stubs Ends Long Types “A	12	15	6	12.75	10.126	1.312	1.312	–	–
12″ Stubs Ends Long Types “A”	12	15	10	12.75	0.375	0.375	64.5	11.75	0.5
14″ Stubs Ends Long Types “A”	14	16.25	12	14	0.375	0.375	84	13	0.5
16″ Stubs Ends Long Types “A”	16	18.5	12	16	0.375	0.375	98	15	0.5
18″ Stubs Ends Long Types “A”	18	21	12	18	0.375	0.375	136	17	0.5
2 1/2″ Stubs Ends Long Types “A	2.5	4.125	2.5	2.875	2.125	0.375	0.375	8.8	1.771
2 1/2″ Stubs Ends Long Types “A”	2.5	4.125	6	2.875	0.203	0.203	4.4	2.323	0.276
2″ Stubs Ends Long Types “A	2	3.625	2.5	2.375	1.689	0.343	0.343	6.1	1.503
2″ Stubs Ends Long Types “A”	2	3.625	6	2.375	0.154	0.154	3.05	1.939	0.218
20″ Stubs Ends Long Types “A”	20	23	12	20	0.375	0.375	157	19	0.5
3 1/2″ Stubs Ends Long Types “A	3.5	5.5	3	4	–	–	–	15.5	2.728
3 1/2″ Stubs Ends Long Types “A”	3.5	5.5	6	4	0.226	0.226	7.75	3.364	0.318
3″ Stubs Ends Long Types “A	3	5	2.5	3.5	2.624	0.438	0.438	9.8	2.3
3″ Stubs Ends Long Types “A”	3	5	6	3.5	0.216	0.216	6.5	2.9	0.3
3/4″ Stubs Ends Long Types “A	0.75	1.688	2	1.05	0.612	0.218	0.219	0.94	0.434
3/4″ Stubs Ends Long Types “A”	0.75	1.688	3	1.05	0.113	0.113	0.47	0.742	0.154
4″ Stubs Ends Long Types “A	4	6.188	3	4.5	3.438	0.531	0.531	19.3	3.152
4″ Stubs Ends Long Types “A”	4	6.188	6	4.5	0.237	0.237	9.65	3.826	0.337
5″ Stubs Ends Long Types “A	5	7.313	3	5.563	4.313	0.625	0.625	32.66	4.063
5″ Stubs Ends Long Types “A”	5	7.313	8	5.563	0.258	0.258	16.33	4.813	0.375
6″ Stubs Ends Long Types “A	6	8.5	3.5	6.625	5.187	0.718	0.719	45.26	4.897
6″ Stubs Ends Long Types “A”	6	8.5	8	6.625	0.28	0.28	22.63	5.761	0.432
8″ Stubs Ends Long Types “A	8	10.625	4	8.625	6.813	0.906	0.906	59.71	6.875
8″ Stubs Ends Long Types “A”	8	10.625	8	8.625	0.322	0.322	34.12	7.625	0.5

Short Stub End Dimensions

Product	Nom. Pipe Size	Diameter (G)	Length (J)	Outside Diameter (O.D.)	Schedule 5S Approx. Weight	Schedule 5S, Inside Diameter (I.D.)	Schedule 5S, Wall Thickness (T)
1 1/2″ Short Stubs Ends Short Type “C”	1.5	2.875	2	1.9	0.29	1.77	0.065
1 1/4″ Short Stubs Ends Short Type “C”	1.25	2.5	2	1.66	0.21	1.53	0.065
1″ Short Stubs Ends Short Type “C”	1	2	2	1.315	0.19	1.185	0.065
1/2″ Short Stubs Ends Short Type “C”	0.5	1.375	2	0.84	0.13	0.71	0.065
10″ Short Stubs Ends Short Type “C”	10	12.75	5	10.75	7.48	10.482	0.134
12″ Short Stubs Ends Short Type “C”	12	15	6	12.75	15	12.438	0.156
14″ Short Stubs Ends Short Type “C”	14	16.25	6	14	19.2	13.688	0.156
16″ Short Stubs Ends Short Type “C”	16	18.5	6	16	23.9	15.67	0.165
18″ Short Stubs Ends Short Type “C”	18	21	6	18	28.5	17.67	0.165
2 1/2″ Short Stubs Ends Short Type “C”	2.5	4.125	2.5	2.875	0.75	2.709	0.083
2″ Short Stubs Ends Short Type “C”	2	3.625	2.5	2.375	0.44	2.245	0.065
20″ Short Stubs Ends Short Type “C”	20	23	6	20	36.3	19.624	0.188
24″ Short Stubs Ends Short Type “C”	24	27.25	6	24	56	23.564	0.218
3″ Short Stubs Ends Short Type “C”	3	5	2.5	3.5	0.94	3.334	0.083
3/4″ Short Stubs Ends Short Type “C”	0.75	1.688	2	1.05	0.14	0.92	0.065
4″ Short Stubs Ends Short Type “C”	4	6.188	3	4.5	1.38	4.334	0.083
5″ Short Stubs Ends Short Type “C”	5	7.313	3	5.563	2.06	5.345	0.109
6″ Short Stubs Ends Short Type “C”	6	8.5	3.5	6.625	2.75	6.407	0.109
8″ Short Stubs Ends Short Type “C”	8	10.625	4	8.625	3.88	8.407	0.109

ASME B16.9 Stub End Dimensions Chart (in inches)

Nominal Pipe Size (NPS)	D1 (Outside Diameter)	D2 (Diameter of Stub End)	L (Length)	B (Flange Thickness)
1/2"	0.840	0.625	1.38	0.125
3/4"	1.050	0.875	1.50	0.125
1"	1.315	1.050	1.75	0.125
1 1/4"	1.660	1.375	2.00	0.125
1 1/2"	1.900	1.500	2.25	0.125
2"	2.375	2.000	2.50	0.125
2 1/2"	2.875	2.500	2.75	0.125
3"	3.500	3.000	3.00	0.125
4"	4.500	3.500	3.50	0.125
5"	5.563	4.500	4.00	0.125
6"	6.625	5.500	4.50	0.125
8"	8.625	7.000	5.00	0.125
10"	10.750	8.625	5.50	0.125
12"	12.750	10.750	6.00	0.125
14"	14.000	12.750	6.50	0.125
16"	16.000	14.000	7.00	0.125
18"	18.000	16.000	7.50	0.125
20"	20.000	18.000	8.00	0.125
24"	24.000	22.000	8.50	0.125
28"	28.000	26.000	9.00	0.125

ASME B16.9 Stub End Tolerance

Parameter	Tolerance
Outside Diameter (OD)	±1% of nominal OD or ±0.5 mm, whichever is greater
Wall Thickness (WT)	±12.5% of specified wall thickness
Overall Length (L)	±1.5% of nominal length or ±3 mm, whichever is greater
Lap Thickness (T)	±0.25 mm or ±10% of the nominal lap thickness, whichever is greater
Height of Lap (H)	±0.5 mm
Inside Diameter (ID)	±1% of nominal ID or ±0.5 mm, whichever is greater
Out-of-Roundness	≤1% of nominal OD
End Preparation	±1 mm for bevel length and ±2° for bevel angle
Surface Finish	Free from cracks, dents, visible seams, or other surface defects
Marking Tolerance	Legible and durable markings in accordance with applicable standards (ASME, ANSI, etc.)

ASME B16.9 Stub End Material

• Carbon Steel:
  1. ASTM A234 WPB (Welded Carbon Steel)
  2. ASTM A105 (Forged Carbon Steel)
• Alloy Steel:
  1. ASTM A234 WP5, WP9, WP11, WP22 (Welded Alloy Steel)
• Stainless Steel:
  1. ASTM A403 (Welded Stainless Steel)
  2. Grades: 304, 316, 316L, 310, 321, 347
• Duplex Stainless Steel:
  1. ASTM A815 (Duplex Stainless Steel)
  2. Grades: 2205, 2507

Benefits

• Versatility: Stub ends can be used in a variety of piping systems, providing a connection between pipes, valves, or flanges.
• Ease of Installation: They allow for easier and more efficient installation by offering a flange-like connection that is simpler to weld.
• Cost-effective: Stub ends are generally more economical compared to using full flanges, making them a cost-effective solution for many piping applications.
• Strong Connections: They provide a strong, reliable connection without the need for complex or expensive components.
• Corrosion Resistance: Stub ends made from stainless steel or other corrosion-resistant materials are ideal for use in harsh environments.

Applications

• Piping Systems
• Chemical and Petrochemical Plants
• Power Plants
• Oil and Gas Industry
• Marine and Offshore
• Water Treatment Facilities