ASME B16.11 Eccentric Swaged Nipple supplier, contact us to get free quote and sample!
ASME B16.11 Eccentric Swaged Nipple is the industry standard for safety, flow efficiency, and structural reliability. Whether you are designing a refinery layout or upgrading a chemical processing line, understanding the nuances of this forged fitting is critical for preventing fluid stagnation and maintaining system pressure.
What is an ASME B16.11 Eccentric Swaged Nipple?
An Eccentric Swaged Nipple is a type of pipe reducer used to connect two pipes of different diameters. Unlike concentric nipples, the eccentric design features an off-center reduction, where one side remains flat.
According to ASME B16.11-the standard governing forged steel fittings, socket-welding, and threaded types-these components are manufactured to withstand extreme pressure-temperature ratings, typically found in Class 3000, 6000, and 9000 applications.
Key Technical Specifications:
Standard: ASME B16.11 / MSS SP-95
Size Range: 1/4" to 4" (DN8 - DN100)
End Connections: PBE (Plain Both Ends), TBE (Threaded Both Ends), BLE/TSE (Beveled Large End/Threaded Small End)
Material Grades: Carbon Steel (A105), Stainless Steel (SS304/316L), Alloy Steel (F11, F22, F91)
Why Choose Eccentric over Concentric?
Preventing Cavitation: In suction lines of pumps, using an eccentric nipple (flat side up) prevents air pockets from forming, which protects the pump from cavitation damage.
Efficient Drainage: In steam or liquid lines, an eccentric nipple (flat side down) ensures that the line can be completely drained without fluid getting trapped at the reduction point.
FAQ
Q: What is the pressure rating for ASME B16.11 swaged nipples?
A: They are primarily categorized into Class 3000 (standard), Class 6000 (high pressure), and Class 9000 (ultra-high pressure), matching the schedule of the pipe being used.
Q: Can I use a Swaged Nipple for both Socket Weld and Threaded connections?
A: Yes, ASME B16.11 covers both threaded (NPT/BSPT) and socket-weld end configurations, providing flexibility for various piping designs.
ASME B16.11 Eccentric Swaged Nipple dimension
|
Nominal size |
OD at end |
Length of small end |
End to end |
|
|
DN |
NPS |
OD1×0D2 |
SL min |
A |
|
65×6 |
21/2×1/8 |
73.0×10.3 |
22 |
178 |
|
65×8 |
21/2×1/4 |
73.0×13.7 |
22 |
|
|
65×10 |
21/2×3/8 |
73.0×17.1 |
22 |
|
|
65×15 |
21/2×1/2 |
73.0×21.3 |
25 |
|
|
65×20 |
21/2×3/4 |
73.0×26.7 |
25 |
|
|
65×25 |
21/2×1 |
73.0×33.4 |
30 |
|
|
65×32 |
21/2×11/4 |
73.0×42.2 |
30 |
|
|
65×40 |
21/2×11/2 |
73.0×48.3 |
40 |
|
|
65×50 |
21/2×2 |
73.0×60.3 |
40 |
|
|
80×6 |
3×1/8 |
88.9×10.3 |
22 |
203 |
|
80×8 |
3×1/4 |
88.9×13.7 |
22 |
|
|
80×10 |
3×3/8 |
88.9×17.1 |
22 |
|
|
80×15 |
3×1/2 |
88.9×21.3 |
25 |
|
|
80×20 |
3×3/4 |
88.9×26.7 |
25 |
|
|
80×25 |
3×1 |
88.9×33.4 |
30 |
|
|
80×32 |
3×11/4 |
88.9×42.2 |
30 |
|
|
80×40 |
3×11/2 |
88.9×48.3 |
40 |
|
|
80×50 |
3×2 |
88.9×60.3 |
40 |
|
|
80×65 |
3×21/2 |
88.9×73.0 |
40 |
|
|
90×6 |
31/2×1/8 |
101.6×10.3 |
22 |
203 |
|
90×8 |
31/2×1/4 |
101.6×13.7 |
22 |
|
|
90×10 |
31/2×3/8 |
101.6×17.1 |
22 |
|
|
90×15 |
31/2×1/2 |
101.6×21.3 |
25 |
|
|
90×20 |
31/2×3/4 |
101.6×26.7 |
25 |
|
|
90×25 |
31/2×1 |
101.6×33.4 |
30 |
|
|
90×32 |
31/2×11/4 |
101.6×42.2 |
30 |
|
|
90×40 |
31/2×11/2 |
101.6×48.3 |
40 |
|
|
90×50 |
31/2×2 |
101.6×60.3 |
40 |
|
|
90×65 |
31/2×21/2 |
101.6×73.0 |
40 |
|
|
90×80 |
31/2×3 |
101.6×88.9 |
40 |
|
|
100×8 |
4×1/4 |
114.3×13.7 |
25 |
229 |
|
100×10 |
4×3/8 |
114.3×17.1 |
25 |
|
|
100×15 |
4×1/2 |
114.3×21.3 |
25 |
|
|
100×20 |
4×3/4 |
114.3×26.7 |
30 |
|
|
100×25 |
4×1 |
114.3×33.4 |
30 |
|
|
100×32 |
4×11/4 |
114.3×42.2 |
40 |
|
|
200×25 |
8×1 |
219.1×33.4 |
40 |
330 |
|
200×32 |
8×11/4 |
219.1×42.2 |
40 |
|
|
200×40 |
8×11/2 |
219.1×48.3 |
45 |
|
|
200×50 |
8×2 |
219.1×60.3 |
45 |
|
|
200×65 |
8×21/2 |
219.1×73.0 |
45 |
|
|
200×80 |
8×3 |
219.1×88.9 |
50 |
|
|
200×90 |
8×31/2 |
219.1×101.6 |
50 |
|
|
200×100 |
8×4 |
219.1×114.3 |
50 |
|
|
200×125 |
8×5 |
219.1×141.3 |
60 |
|
|
200×150 |
8×6 |
219.1×168.3 |
60 |
|
|
250×50 |
10×2 |
273.0×60.3 |
45 |
381 |
|
250×65 |
10×21/2 |
273.0×73.0 |
45 |
|
|
250×80 |
10×3 |
273.0×88.9 |
50 |
|
|
250×90 |
10×31/2 |
273.0×101.6 |
50 |
|
|
250×100 |
10×4 |
273.0×114.3 |
60 |
|
|
250×125 |
10×5 |
273.0×141.3 |
60 |
|
|
250×150 |
10×6 |
273.0×168.3 |
65 |
|
|
250×200 |
10×8 |
273.0×219.1 |
65 |
|
|
300×50 |
12×2 |
323.8×60.3 |
50 |
406 |
|
300×65 |
12×21/2 |
323.8×73.0 |
50 |
|
|
300×80 |
12×3 |
323.8×88.9 |
60 |
|
|
300×90 |
12×31/2 |
323.8×101.6 |
60 |
|
|
300×100 |
12×4 |
323.8×114.3 |
65 |
|
|
300×125 |
12×5 |
323.8×141.3 |
65 |
|
|
300×150 |
12×6 |
323.8×168.3 |
65 |
|
|
300×200 |
12×8 |
323.8×219.1 |
70 |
|
|
300×250 |
12×10 |
323.8×273.0 |
70 |
|
Note:
If ordering per SH/T 3419, the outside diameter specified in SH/T 3405, "tube outside diameter in the petrochemical industry," shall be applied.
Ready to Secure Your Piping System?
Don't compromise on safety. As a leading manufacturer of ASME B16.11 Forged Fittings, we provide full MTC (Material Test Certificates) 3.1, ensuring every Eccentric Swaged Nipple meets global safety codes.
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