These fittings are ubiquitous in industrial applications, including petrochemicals, gas processing, and nuclear power plants.Stainless steel pipe fittingscan undergo hot or cold working per client requirements.
As a rule of thumb, cold working renders the material stronger but at the cost of ductility. In contrast, hot working leads to reduced strength due to austenitization.
Considering the stainless steel grade of the fittings is vital. For example, Grade 304 cannot get hardened by heat treatment.
We are one of India’s top SS pipe fittings supplier in Mumbai as per ANSI B16.9
The installation depends on the type of fittings. For instance, socket-weld fittings don’t need bevelled pipe ends and are straightforward to weld. However, stainless steel welded fittings(buttweld) need a skilled technician.
The standard approach is arc welding while keeping distance from any non-metallic materials and using correct temperatures (around 60 °C). Pickling and passivation are recommended after welding.
Stockist of stainless pipe fittings like SS elbow and tee that have been finished and certified as per ASTM A403
Stainless steel pipe fittings
Stainless steel fittings
Stainless pipe fittings
These fittings undergo a thorough visual inspection, destructive tests, NDT or non-destructive testing, and macro/micro analysis. Stainless steel fittings generally undergo a burst test, besides assessments of the tensile strength and impact resistance. Hydrostatic and Charpy V-Notch tests may also get performed if the customer requests.
NDT procedures usually include ultrasonic tests, radiography, magnetic particle inspection, and a liquid penetrant test.
Certain specific applications necessitate distinct examinations. For instance, chemical processing and sour applications require resistance to Intergranular Corrosion (IGC) or Hydrogen-induced Cracking (HIC).
Get quote now for better and more adaptable stainless steel reducer and stub end in Sch 5 to XXS as per MSS SP-75 specification
Table of Content
Seamless Fittings Size | Standard | Welded Fittings Size |
---|---|---|
1/2″ to 10″ | ASME/ANSI B16.9, ASME B16.28 | 1/2″ – 48″ |
Manufacturing process | End Connections | SS Fittings Applications |
Forge, Cast, Press, Push | socket weld / threaded | Chemical, Oil and Gas Processing Industries |
Schedule | SS Fittings Thickness | Fittings Type |
Sch 5 to XXS | 10 swg. to 20 swg. | Elbow, tee, reducer, cap stub end |
Fittings Specification | Process | Testing methods |
ASTM A403 /ASME SA 403 | Seamless, welded, fabricated | proof test, hydrotest, NDT test, destructive |
We guarantee to provide SS buttweld fittings including seamless and welded fittings with the required documents as soon as possible at lowest cost
SS reducer
- Standard: ASME B16.9/ ASME B16.28
- Grades: 304, 316, 317L, 904L
Stainless steel elbow
- Sizes: 1/2″ to 48″
- Methods: Seamless, welded, buttweld
Stainless steel welded fittings
- Schedule: SCH 5 to SCH XXS
- Types: Elbow, tee, reducer, cap, pipe cross
SS tee
- Thickness: 1.5MM to 20MM
- Application: Chemical, petrochemical, oil and gas
Stainless steel buttweld fittings
- Surface finish: Hot dip galvanized, Epoxy coated, Mirror polish
Stainless steel seamless fittings
- Testing methods: hydrotest, proof test, NDT test, destructive
We can complete your SS pipe cap needs to finish your project with custom testing report
Grade | Mn | C | P | Si | S | Cr | Ni | Mo | N |
---|---|---|---|---|---|---|---|---|---|
304 | 2.0 | 0.08 | 0.045 | 0.75 | 0.030 | 18.0-20.0 | 8.0-10.5 | – | 0.10 |
304L | 2.0 | 0.030 | 0.045 | 0.75 | 0.030 | 18.0-20.0 | 8.0-12.0 | – | 0.10 |
304H | 2.0 | 0.04-0.10 | 0.045 | 0.75 | 0.030 | 18.0-20.0 | 8.0-10.5 | – | – |
310 | 2 | 0.015 | 0.020 | 0.15 | 0.015 | 24.00 – 26.00 | 19.00 – 21.00 | 0.10 | 54.7 min |
310S | 2 | 0.08 | 0.045 | 1.0 | 0.030 | 24.00 – 26.00 | 19.00 – 21.00 | 0.75 | 53.095 min |
316 | 2.0 | 0.08 | 0.045 | 1.0 | 0.030 | 16.00 – 18.00 | 11.00 – 14.00 | 2.00 – 3.00 | 67.845 min |
316L | 2.0 | 0.035 | 0.045 | 1.0 | 0.030 | 16.00 – 18.00 | 10.00 – 14.00 | 2.00 – 3.00 | 68.89 min |
316H | 0.10 | 0.10 | 0.045 | 0.75 | 0.030 | 16.00 – 18.00 | 10.00 – 14.00 | 2.00 – 3.00 | – |
SS 317 | 2.0 | 0.08 | 0.045 | 1.0 | 0.030 | 18.00 – 20.00 | 11.00 – 15.00 | 3.00 – 4.00 | 57.845 min |
SS 317L | 2.0 | 0.035 | 0.045 | 1.0 | 0.030 | 18.00 – 20.00 | 11.00 – 15.00 | 3.00 – 4.00 | 57.89 min |
SS 321 | 2.0 | 0.08 | 0.045 | 1.0 | 0.030 | 17.00 – 19.00 | 5(C+N) – 0.70 | – | 9.00 – 12.00 |
SS 321H | 2.0 | 0.04 – 0.10 | 0.045 | 1.0 | 0.030 | 17.00 – 19.00 | 9.00 – 12.00 | – | 0.10 |
SS 347 | 2.0 | 0.08 | 0.045 | 1.0 | 0.030 | 17.00 – 20.00 | 9.00 – 13.00 | – | – |
SS 347H | 2.0 | 0.04 – 0.10 | 0.045 | 1.0 | 0.030 | 17.00 – 19.00 | 9.0 -13.0 | – | – |
SS 409 | 1.00 | 0.08 | 0.045 | 1.00 | 0.030 | 10.5 – 11.75 | 0.5 | – | – |
SS 410S | 1.00 | 0.080 | 0.040 | 1.00 | 0.030 | 10.5 – 12.5 | – | – | – |
SS 904L | 2.00 | 0.020 | 0.040 | 1.00 | 0.030 | 19.00 – 23.00 | 23.00 – 28.00 | 4.00 – 5.00 | – |
Grade | Melting Point | Density | Tensile Strength | Elongation | Yield Strength (0.2%Offset) |
---|---|---|---|---|---|
304/304H/304L | 1400 °C (2550 °F) | 8.0 gram/cm3 | Psi 75000 , MPa 515 | 35 % | Psi 30000 , MPa 205 |
310/310S | 1402 °C (2555 °F) | 7.9 gram/cm3 | Psi 75000 , MPa 515 | 40 % | Psi 30000 , MPa 205 |
316/316L/316H | 1400 °C (2550 °F) | 8.0 gram/cm3 | Psi 75000 , MPa 515 | 35 % | Psi 30000 , MPa 205 |
317/ 317L | 1400 °C (2550 °F) | 7.9 gram/cm3 | Psi 75000 , MPa 515 | 35 % | Psi 30000 , MPa 205 |
321/ 321H | 1457 °C (2650 °F) | 8.0 gram/cm3 | Psi 75000 , MPa 515 | 40 % | Psi 30000 , MPa 205 |
347/ 347H | 1454 °C (2650 °F) | 8.0 gram/cm3 | Psi 75000 , MPa 515 | 35 % | Psi 30000 , MPa 205 |
410S | 1532°C (2790°F) | 7.80 gram/cm3 | Psi 75000 , MPa 515 | 25 % | Psi 30000 , MPa 205 |
904L | 1350 °C (2460 °F) | 7.95 gram/cm3 | Psi 71000 , MPa 490 | 35 % | Psi 32000 , MPa 220 |
STANDARD | UNS | WERKSTOFF NR. | JIS | GOST | BS | EN | AFNOR |
---|---|---|---|---|---|---|---|
SS 304 | S30400 | 1.4301 | SUS 304 | 08Х18Н10 | 304S31 | X5CrNi1810 | Z7CN18‐09 |
SS 304L | S30403 | 1.4306 / 1.4307 | SUS 304L | 03Х18Н11 | 3304S11 | X2CrNi189 / X2CrNi1911 | Z3CN18‐10 |
SS 304H | S30409 | 1.4301 | |||||
SS 310 | S31000 | 1.4841 | SUS 310 | 20Ch25N20S2 | 310S24 | X15CrNi2520 | |
SS 310S | S31008 | 1.4845 | SUS 310S | 20Ch23N18 | 310S16 | X8CrNi2521 | |
SS 316 | S31600 | 1.4401 / 1.4436 | SUS 316 | 316S31 / 316S33 | X5CrNiMo17122 / X3CrNiMo17133 |
Z7CND17‐11‐02 | |
SS 316L | S31603 | 1.4404 / 1.4435 | SUS 316L | 03Ch17N14M3 / 03Ch17N14M2 | 316S11 / 316S13 | X2CrNiMo17122 / X2CrNiMo18143 |
Z3CND17‐11‐02 / Z3CND18‐14‐03 |
SS 316H | S31609 | 316S51 | |||||
SS 317 | S31700 | 1.4449 | SUS 317 | X5CrNiMo1713 | |||
SS 317L | S31703 | 1.4438 | SUS 317L | X2CrNiMo18154 | |||
SS 321 | S32100 | 1.4541 | SUS 321 | X6CrNiTi1810 | |||
SS 321H | S32109 | 1.4878 | SUS 321H | X12CrNiTi189 | |||
SS 347 | S34700 | 1.4550 | SUS 347 | X6CrNiNb1810 | |||
SS 347H | S34709 | 1.4961 | SUS 347H | X6CrNiNb1812 | |||
SS 409 | S40900 | 1.4512 | SUS409 | X2CrTi12 | |||
SS 410S | S41008 | 1.4516 | SUS410S | X6CrNiTi12 | |||
SS 904L | N08904 | 1.4539 | SUS 904L | STS 317J5L | 904S13 | X1NiCrMoCu25205 | Z2 NCDU 2520 |
Pipe fittings Tolerance | |||||||
---|---|---|---|---|---|---|---|
Common Type Of Buttweld fittings | 45 degree elbows And 90 deg elbows fittings | 180 Deg Returns | |||||
Normal Size Of Steel Pipe | ID at End |
OD at Bevel |
WT For (Wall Thickness) t / t1 |
Center-End Dai. A-B-C-M | Back-Face Dai. (K) |
Center-Center Dai. (O) |
Align-ment of Ends (U) |
3 a 3 1/2 | 1,6 | 1 | less | 2 | 7 | 7 | 1 |
1/2 a 2 1/2 | 0,8 | 1 | Not | 2 | 7 | 7 | 1 |
32 a 48 | 4,8 | +7 -5 | 5 | ||||
4 | 1,6 | +2 -1 | than | 2 | 7 | 7 | 1 |
8 | 1,6 | 2 | of nominal | 2 | 7 | 7 | 1 |
5 a 6 | 1,6 | +3 -1 | 87,50% | 2 | 7 | 7 | 1 |
10 | 3,2 | +4 -3 | tickness | 2 | 7 | 7 | 2 |
20 a 24 | 4,8 | +6 -5 | 3 | 10 | 2 | 7 | |
12 a 18 | 3,2 | +4 -3 | 3 | 10 | 2 | 7 | |
26 a 30 | 4,8 | +7 -5 | 3 |
Construction | fittings Classes | Non-destructive Exam |
---|---|---|
Welded | WX | Radiography |
Welded | W | Radiography or Ultrasonic |
Seamless | S | None |
Welded | WU | Ultrasonic |
fittings (psig) Pressure-Temperature ratings | |||||
---|---|---|---|---|---|
Ratings of Temperature | fittings Pressure Class | ||||
150 | 300 | ||||
1 1/4 – 2 inch. | 1/4 – 1 inch. | 2 1/2 – 3 inch. | |||
(oC) | (oF) | ||||
93 | 200 | 265 | 1350 | 1785 | 910 |
-29 to 66 | -20 to 150 | 300 | 1500 | 2000 | 1000 |
149 | 300 | 185 | 1050 | 1360 | 735 |
121 | 250 | 225 | 1200 | 1575 | 825 |
204 | 400 | 750 | 935 | 560 | |
177 | 350 | 150 | 900 | 1150 | 650 |
260 | 500 | 450 | 510 | 385 | |
232 | 450 | 600 | 725 | 475 | |
288 | 550 | 300 | 300 | 300 |
- MSS SP-43
- ASME B16.9
- ASME SA403/ASTM A403
Welded fittings | Seamless fittings | |
---|---|---|
Elbows | Up to 42″ | Up to 24″ |
End Caps | Up to 24″ | |
Tees | Upto 36″ | Upto 24″ |
Return Bends | Up to 8″ | |
Reducers | Up to 48″ | Up to 24″ |
Swage Nipple | Up to 4″ | |
Cross | Upto 36″ | Upto 8″ |
Nominal Pipe Size |
Outside Diameter |
Reducers | ||
---|---|---|---|---|
Reduced from (Inch) |
(mm) | (Inch) | Reduced to (Inch) |
Concentric & Eccentric Length (Inch) |
1/2 | 21.3 | 0.840 | 1/4 | 1 1/2 |
3/8 | 1 1/2 | |||
3/4 | 26.7 | 1.050 | 3/8 | 2 |
1/2 | 2 | |||
1 | 33.4 | 1.315 | 3/8 | 2 |
1/2 | 2 | |||
3/4 | 2 | |||
1 1/4 | 42.2 | 1.660 | 1/2 | 2 |
3/4 | 2 | |||
1 | 2 | |||
1 1/2 | 48.3 | 1.900 | 1/2 | 2 1/2 |
3/4 | 2 1/2 | |||
1 | 2 1/2 | |||
1 1/4 | 2 1/2 | |||
2 | 60.3 | 2.375 | 3/4 | 3 |
1 | 3 | |||
1 1/4 | 3 | |||
1 1/2 | 3 | |||
2 1/2 | 73.0 | 2.875 | 1 | 3 1/2 |
1 1/4 | 3 1/2 | |||
1 1/2 | 3 1/2 | |||
2 | 3 1/2 | |||
3 | 88.9 | 3.500 | 1 | 3 1/2 |
1 1/2 | 3 1/2 | |||
2 | 3 1/2 | |||
2 1/2 | 3 1/2 | |||
3 1/2 | 101.6 | 4.000 | 1 1/4 | 4 |
1 1/2 | 4 | |||
2 | 4 | |||
2 1/2 | 4 | |||
3 | 4 | |||
4 | 114.3 | 4.500 | 1 1/2 | 4 |
2 | 4 | |||
2 1/2 | 4 | |||
3 | 4 | |||
3 1/2 | 4 | |||
5 | 141.3 | 5.563 | 2 | 5 |
2 1/2 | 5 | |||
3 | 5 | |||
3 1/2 | 5 | |||
4 | 5 | |||
6 | 168.3 | 6.625 | 2 1/2 | 5 1/2 |
3 | 5 1/2 | |||
3 1/2 | 5 1/2 | |||
4 | 5 1/2 | |||
5 | 5 1/2 | |||
8 | 219.1 | 8.625 | 3 | 6 |
3 1/2 | 6 | |||
4 | 6 | |||
5 | 6 | |||
6 | 6 | |||
10 | 273.1 | 10.750 | 4 | 7 |
5 | 7 | |||
6 | 7 | |||
8 | 7 | |||
12 | 323.9 | 12.750 | 5 | 8 |
6 | 8 | |||
8 | 8 | |||
10 | 8 |
DN | SCH 40S | SCH 10S | SCH 80S | ||||||
---|---|---|---|---|---|---|---|---|---|
90° Elbow | 45° Elbow | Equal tee | 90° Elbow | 45° Elbow | Equal tee | 90° Elbow | 45° Elbow | Equal tee | |
8 | 0.03 | 0.02 | 0.06 | 0.02 | 0.01 | 0.03 | 0.04 | 0.03 | 0.07 |
10 | 0.03 | 0.02 | 0.03 | 0.03 | 0.02 | 0.05 | 0.06 | 0.04 | 0.09 |
15 | 0.08 | 0.04 | 0.10 | 0.06 | 0.03 | 0.09 | 0.10 | 0.05 | 0.14 |
20 | 0.08 | 0.04 | 0.17 | 0.07 | 0.03 | 0.13 | 0.11 | 0.05 | 0.20 |
25 | 0.15 | 0.11 | 0.29 | 0.14 | 0.08 | 0.28 | 0.22 | 0.14 | 0.38 |
32 | 0.26 | 0.17 | 0.59 | 0.23 | 0.11 | 0.49 | 0.40 | 0.23 | 0.68 |
40 | 0.40 | 0.23 | 0.86 | 0.30 | 0.17 | 0.68 | 0.51 | 0.29 | 1.02 |
50 | 0.70 | 0.4 | 1.28 | 0.50 | 0.25 | 0.85 | 0.91 | 0.59 | 1.59 |
65 | 1.40 | 0.77 | 2.19 | 0.85 | 0.48 | 1.41 | 1.81 | 0.99 | 3.13 |
80 | 2.20 | 1.08 | 3.31 | 1.25 | 0.63 | 1.77 | 2.97 | 1.50 | 4.45 |
90 | 2.83 | 1.42 | 4.08 | 1.70 | 0.75 | 2.67 | 4.00 | 2.00 | 5.44 |
100 | 4.47 | 2.09 | 5.27 | 2.10 | 1.08 | 3.46 | 6.18 | 2.81 | 7.71 |
150 | 10.89 | 5.44 | 10.99 | 5.45 | 2.72 | 8.07 | 16.32 | 8.16 | 13.61 |
200 | 21.54 | 10.77 | 20.91 | 10.20 | 5.33 | 15.65 | 33.11 | 16.56 | 28.12 |
250 | 38.56 | 19.27 | 35.38 | 18.15 | 9.75 | 26.46 | 51.71 | 25.86 | 49.90 |
300 | 59.42 | 29.71 | 62.14 | 25.80 | 13.62 | 39.46 | 79.38 | 39.69 | 83.91 |
Nominal Pipe Size (inch) |
Outside Diameter |
45° Elbows | 90° Elbow | 180° Returns | ||||
---|---|---|---|---|---|---|---|---|
Long Radius | Long Radius | Short Radius | Long Radius | |||||
(milimeter) | (inch) | Center to Face (inch) |
Radius (inch) |
Center to Face (inch) |
Center to Face (inch) |
Center to Center (inch) |
Back to face (inch) |
|
1/2 | 21.3 | 0.840 | 5/8 | 1 1/2 | – | 2 | 1 7/8 | |
3/4 | 26.7 | 1.050 | 7/16 | 1 1/8 | – | 2 1/4 | 1 11/16 | |
1 | 33.4 | 1.315 | 7/8 | 1 1/2 | 1 | 3 | 2 3/16 | |
1 1/4 | 42.2 | 1.660 | 1 | 1 7/8 | 1 1/4 | 3 3/4 | 2 3/4 | |
1 1/2 | 48.3 | 1.900 | 1 1/8 | 3 | 2 1/4 | 1 1/2 | 4 1/2 | 3 1/4 |
2 | 60.3 | 2.375 | 1 3/8 | 4 | 3 | 2 | 6 | 4 3/16 |
2 1/2 | 73.0 | 2.875 | 1 3/4 | 5 | 3 3/4 | 2 1/2 | 7 1/2 | 5 3/16 |
3 | 88.9 | 3.500 | 2 | 6 | 4 1/2 | 3 | 9 | 6 1/4 |
3 1/2 | 101.6 | 4.000 | 2 1/4 | 7 | 5 1/4 | 3 1/2 | 10 1/2 | 7 1/4 |
4 | 114.3 | 4.500 | 2 1/2 | 8 | 6 | 4 | 12 | 8 1/4 |
5 | 141.3 | 5.563 | 3 1/8 | 10 | 7 1/2 | 5 | 15 | 10 5/16 |
6 | 168.3 | 6.625 | 3 3/4 | 12 | 9 | 6 | 18 | 12 5/16 |
8 | 219.1 | 8.625 | 5 | 12 | 12 | 8 | 24 | 16 5/16 |
10 | 273.1 | 10.750 | 6 1/4 | 15 | 15 | 10 | 30 | 20 3/8 |
12 | 323.9 | 12.750 | 7 1/2 | 18 | 18 | 12 | 36 | 24 3/8 |
Nominal Pipe Sizes (inch) |
Outside Dia |
Straight Crosses | Caps | Straight Tees | Stub Ends | |||
---|---|---|---|---|---|---|---|---|
(milimeter) | (inch) | Center to End (inch) |
Length (inch) |
Center to End (inch) |
Lap Diameter (inch) |
Long Length (inch) |
Short Length (inch) |
|
1/2 | 21.3 | 0.840 | – | 1 | 1 | 1 3/8 | 3 | 2 |
3/4 | 26.7 | 1.050 | – | 1 | 1 1/8 | 1 11/16 | 3 | 2 |
1 | 33.4 | 1.315 | 1 1/2 | 1 1/2 | 1 1/2 | 2 | 4 | 2 |
1 1/4 | 42.2 | 1.660 | 1 7/8 | 1 1/2 | 1 7/8 | 2 1/2 | 4 | 2 |
1 1/2 | 48.3 | 1.900 | 2 1/4 | 1 1/2 | 2 1/4 | 2 7/8 | 4 | 2 |
2 | 60.3 | 2.375 | 2 1/2 | 1 1/2 | 2 1/2 | 3 5/8 | 6 | 2 1/2 |
2 1/2 | 73.0 | 2.875 | 3 | 1 1/2 | 3 | 4 1/8 | 6 | 2 1/2 |
3 | 88.9 | 3.500 | 3 3/8 | 2 | 3 3/8 | 5 | 6 | 2 1/2 |
3 1/2 | 101.6 | 4.000 | 3 3/4 | 2 1/2 | 3 3/4 | 5 1/2 | 6 | 3 |
4 | 114.3 | 4.500 | 4 1/8 | 2 1/2 | 4 1/8 | 6 3/16 | 6 | 3 |
5 | 141.3 | 5.563 | 4 7/8 | 3 | 4 7/8 | 7 5/16 | 8 | 3 |
6 | 168.3 | 6.625 | 5 5/8 | 3 1/2 | 5 5/8 | 8 1/2 | 8 | 3 1/2 |
8 | 219.1 | 8.625 | 7 | 4 | 7 | 10 5/8 | 8 | 4 |
10 | 273.1 | 10.750 | 8 1/2 | 5 | 8 1/2 | 12 3/4 | 10 | 5 |
12 | 323.9 | 12.750 | 10 | 6 | 10 | 15 | 10 | 6 |
The pressure class – 150, 3000, etc. – indicates the pressure the fittings can handle (in PSI). A stainless steel elbow must withstand the amount stated in the corresponding piping code.
The schedule number, or SCH, linked to the thickness of the pipe, is salient here. Note that if the pipe sections have different dimensions, both ends have to comply.
Stainless steel seamless fittings are suited to high-pressure conditions, primarily as they don’t contain a welded seam (a potentially weak region). They can also be used with corrosive fluids.
The widespread acceptance of these fittings emanates from their many merits: long service life, corrosion resistance, and low maintenance requirements.
- Analyse application requirements, i.e., altering the direction, branching the piping, or lowering the diameter
- Select the kind of fittings: For instance, threaded SS fittings are straightforward to install with limited expert help or tools. They are appropriate for non-critical applications.
- Assess the dimensions, pressure class, and atmospheric/ambient conditions.
- Find a manufacturer that uses quality raw materials for stainless steel tube fittings.
- Check the quality norms and adherence to global standards.
- Lay out delivery timelines, with packaging and shipping guidelines.
- Verify intensive testing, like a PMI and other NDT procedures, and supporting documents, like an MTC.
These fittings are considered the strongest and most suitable for tolerating high pressures. Stainless steel buttweld fittings deliver a robust connection due to complete-penetration welding. They use hot or cold forming followed by heat treatment to attain desired mechanical properties.
SS buttweld fittings benefit from a smooth inner surface, which maintains the flow of the corresponding media. Also, it reduces turbulence and circumvents sudden pressure fluctuations.
Trusted manufacturers with sizable portfolios and established clientele can usually provide discounts on stainless pipe fittings. Pick a provider with a keen quality focus, efficient production techniques, and scalable shipping.
Customers can also request discounts on delivery and installation charges of SS pipe fittings. Expedited timelines and customized requirements usually cost more.