This blog introduces a professional overview of the specifications for Sockolets and Threadolets made from Monel K500 in accordance with the ASME B16.11 standard.
Overview of ASME B16.11 Standard
ASME B16.11 specifies dimensions, tolerances, and ratings for forged steel fittings, including socket-weld and threaded types, in sizes from 1/8" to 4" NPS.
While originally for carbon and alloy steels, it extends to non-ferrous materials like Monel K500 via material specifications such as ASTM B564.
Pressure classes include 2000#, 3000#, 6000#, and 9000#, with Monel K500 typically rated for 3000# and 6000# due to its mechanical properties: yield strength of 100-150 ksi and tensile strength of 160-200 ksi.
Dimensions ensure compatibility with pipe schedules, focusing on bore, height, and outlet sizes for leak-proof joints. Tolerances are tight (±0.010" for sockets, ±1/64" for threads) to maintain integrity under pressure.
Sockolets and Threadolets are branch outlet fittings (Olets) per MSS SP-97, integrated with ASME B16.11 for forging quality. Sockolets use socket-weld ends for high-strength, permanent connections, ideal for small-bore piping. Threadolets feature NPT or BSP threads for easier installation and removal, suited for low-to-medium pressure systems.
For Monel K500, these fittings undergo solution annealing and age hardening to optimize corrosion resistance and fatigue life.
Sockolet Dimensions in ASME B16.11
Sockolets are contoured for welding onto run pipes, with the outlet socket matching the branch pipe's OD. Dimensions vary by class and size, ensuring proper reinforcement.
Below is a summarized table for Class 3000# Monel K500 Sockolets, based on standard data. All measurements are in inches; weights are in pounds.
ASME B16.11 Sockolet
|
Nominal size |
Branch pipe nominal size |
Depth of socket |
Face of fitting to crotch |
Diameter of fitting |
Socket wall thickness |
Hole diameter |
||||||
|
DN |
NPS |
DN |
NPS |
Jmin |
Amax |
Dmax |
Cmin |
d1 nom |
||||
|
3000 |
6000 |
3000 |
6000 |
3000 |
6000 |
3000 |
6000 |
|||||
|
8-900 |
1/4-36 |
6 |
1/8 |
9.5 |
10 |
一 |
27 |
一 |
3.18 |
一 |
16 |
一 |
|
10-900 |
3/8-36 |
8 |
1/4 |
9.5 |
10 |
一 |
27 |
一 |
3.78 |
一 |
16 |
一 |
|
15-900 |
1/2-36 |
10 |
3/8 |
9.5 |
13 |
一 |
30 |
一 |
4.01 |
一 |
19 |
一 |
|
20-900 |
3/4-36 |
15 |
1/2 |
9.5 |
16 |
24 |
38 |
47 |
4.67 |
5.97 |
24 |
19 |
|
25-900 |
1-36 |
20 |
3/4 |
12.5 |
16 |
25 |
47 |
53 |
4.90 |
6.96 |
30 |
25 |
|
32-900 |
11/4-36 |
25 |
1 |
12.5 |
22 |
29 |
56 |
63 |
5.69 |
7.92 |
36 |
33 |
|
40-900 |
11/2-36 |
32 |
11/4 |
12.5 |
22 |
30 |
66 |
74 |
6.07 |
7.92 |
45 |
38 |
|
50-900 |
2-36 |
40 |
11/2 |
12.5 |
24 |
32 |
75 |
83 |
6.35 |
8.92 |
51 |
49 |
|
65-900 |
21/2-36 |
50 |
2 |
16.0 |
24 |
37 |
90 |
104 |
6.93 |
10.92 |
65 |
59 |
|
80-900 |
3-36 |
65 |
21/2 |
16.0 |
25 |
一 |
105 |
一 |
8.76 |
一 |
76 |
一 |
|
100-900 |
4-36 |
80 |
3 |
16.0 |
30 |
一 |
124 |
一 |
9.52 |
一 |
94 |
一 |
|
125-900 |
5-36 |
100 |
4 |
19.0 |
30 |
一 |
154 |
一 |
10.69 |
一 |
121 |
一 |
TOLERANCE FOR SW FITTINGS
|
Nominal size |
All fittings |
Elbows,tees &crosses |
Couplings |
Half- couplings |
Reducer inserts |
Unions |
||||
|
Socket bore diameter |
Bore diameter of fittings |
Center to bottom of socket |
End wall thickness |
Laying length |
Laying length |
Shank diameter |
Length |
Laying length |
||
|
DN |
NPS |
B |
D |
A.H |
E |
F |
A |
SD |
SL |
E |
|
6-8 |
1/8-1/4 |
+0.4 0 |
+1.5 0 |
±1.0 |
±1.5 |
±1.0 |
+1.5 0 |
±0.25 |
0 -1.5 |
±1.5 |
|
10-20 |
3/8-3/4 |
+0.4 0 |
+1.5 0 |
±1.5 |
±3.0 |
±1.5 |
+1.5 0 |
±0.25 |
0 -1.5 |
±3.0 |
|
25-40 |
1-11/2 |
+0.4 0 |
+1.5 0 |
±2.0 |
±4.0 |
±2.0 |
+2.0 0 |
±0.25 |
0 -2.0 |
±4.0 |
|
50 |
2 |
+0.5 0 |
+1.5 0 |
±2.0 |
±4.0 |
±2.0 |
+2.0 0 |
±0.5 |
0 -2.0 |
±4.0 |
|
65-80 |
21/2-3 |
+0.5 0 |
+3.0 0 |
±2.5 |
±5.0 |
±2.5 |
+2.5 0 |
±0.5 |
0 -2.5 |
±5.0 |
|
100 |
4 |
+0.5 0 |
+3.0 0 |
±2.5 |
±5.0 |
±2.5 |
+2.5 0 |
±0.7 |
0 -2.5 |
一 |
Threadolet Dimensions in ASME B16.11
Threadolets provide threaded outlets for quick assembly, with NPT threads per ASME B1.20.1. They are forged for durability, with dimensions emphasizing thread length and bore alignment.
|
Run pipe nominal size |
Branch pipe nominal size |
Face of fitting to crotch |
Diameter of fitting |
Diameter a tend of branch pipe |
Length of thread |
Hole diameter |
||||||
|
DN |
NPS |
DN |
NPS |
A |
D1min |
D2min |
L2min |
d1 nom |
||||
|
3000 |
6000 |
3000 |
6000 |
3000 |
6000 |
3000 |
6000 |
|||||
|
8-900 |
1/4-36 |
6 |
1/8 |
19 |
一 |
27 |
一 |
22 |
一 |
6.7 |
16 |
一 |
|
10-900 |
3/8-36 |
8 |
1/4 |
19 |
一 |
27 |
一 |
22 |
一 |
10.2 |
16 |
一 |
|
15-900 |
1/2-36 |
10 |
3/8 |
21 |
一 |
30 |
一 |
25 |
一 |
10.4 |
19 |
一 |
|
20-900 |
3/4-36 |
15 |
1/2 |
25 |
32 |
38 |
45 |
33 |
42 |
13.6 |
24 |
19 |
|
25-900 |
1-36 |
20 |
3/4 |
27 |
37 |
47 |
52 |
39 |
48 |
13.9 |
30 |
25 |
|
32-900 |
11/4-36 |
25 |
1 |
33 |
40 |
56 |
63 |
48 |
58 |
17.3 |
36 |
33 |
|
40-900 |
11/2-36 |
32 |
11/4 |
33 |
41 |
66 |
72 |
58 |
67 |
18.0 |
45 |
38 |
|
50-900 |
2-36 |
40 |
11/2 |
35 |
43 |
75 |
83 |
64 |
77 |
18.4 |
51 |
49 |
|
65-900 |
21/2-36 |
50 |
2 |
38 |
52 |
90 |
104 |
77 |
93 |
19.2 |
65 |
59 |
|
80-900 |
3-36 |
65 |
21/2 |
46 |
一 |
105 |
一 |
94 |
一 |
28.9 |
76 |
一 |
|
100-900 |
4-36 |
80 |
3 |
51 |
一 |
124 |
一 |
114 |
一 |
30.5 |
94 |
一 |
|
125-900 |
5-36 |
100 |
4 |
57 |
一 |
154 |
一 |
140 |
一 |
33.0 |
121 |
一 |
TOLERANCE FOR THRDFITTINGS
|
Nominal size |
Elbows,tees & crosses |
Couplings |
Half-couplings |
|
|
Center-to-end |
End-to-end |
Elbows,tees&crosses |
||
|
DN |
NPS |
A.J |
W |
W/2 |
|
6-8 |
1/8-1/4 |
±1.0 |
±1.0 |
±1.0 |
|
10-20 |
3/8-3/4 |
±1.5 |
±1.5 |
±1.5 |
|
25-50 |
1-2 |
±2.0 |
±2.0 |
±2.0 |
|
65-100 |
21/2-4 |
±2.5 |
±2.5 |
±2.5 |
Critical Dimensional Notes:
Pressure Class: For the same run x branch combination, a Class 6000 fitting will have a larger body O.D. and a greater minimum height (H) compared to a Class 3000 fitting, due to increased wall thickness for higher pressure containment.
Outlet Schedule: The "Standard" outlet is designed to match a schedule 40 branch pipe, while the "Heavy" outlet matches a schedule 80 (or heavier) branch. The heavy outlet will have a larger outlet O.D. and often a slightly greater height to accommodate the thicker branch pipe wall.
Tolerances: ASME B16.11 defines manufacturing tolerances for all critical dimensions. Reputable manufacturers provide certified dimensional reports confirming compliance.
Material Consideration: Monel K500 has a density of approximately 8.44 g/cm³. A Monel K500 fitting will be heavier than a carbon steel fitting of the same size and class.
Conclusion
Specifying ASME B16.11 Monel K500 Sockolets and Threadolets requires a balance of dimensional accuracy and metallurgical understanding. These fittings represent the "high-performance" tier of branch connections, designed for environments where failure is not an option.
By adhering to the dimensions outlined in MSS SP-97 and ensuring the age-hardened properties of the UNS N05500 material, you secure a piping system that is as durable as it is precise.
Do you need help selecting the correct curvature for your specific run pipe sizes, or would you like to discuss the lead times for age-hardened K500 forgings?
