Corrosion resistance and outstanding durability make these fittings in-demand by multiple industries. Stainless steel 904L pipe fittings work in chemical processing for formulating organic and inorganic acids.
They also work in oil refineries, fertiliser plants (esp. phosphate-based), and equipment for pharmaceuticals or paper-pulp processing. A prime role of these pipe fittings is in condensers and heat exchangers for saltwater applications – thanks to their favourable thermal and corrosion-proof properties.
ASTM A403 WP904L Elbow manufacturer in India
Elbow fittings are widely used in industrial pipelines to divert and manage the flow of the required media. Buyers should select an A403 WP904L elbowthat matches the application needs for curvature (90, 45, or 180 degrees) and ambient pressure and temperature. It should resist pitting and intergranular corrosion.
Engineers have to analyse the centre-to-face distance and judge the kind of fittings – short or long radius elbow. You will also have to decide the kind of connection, wherein buttweld elbows are ideal for higher pressures and temperatures. Buyers can consider threaded elbows for repair or maintenance.
We recommend procuring SS 904L pipe fittings from manufacturers who prioritise quality control. Fully traceable fittings that undergo testing like Positive Material Identification and spectro analysis are likelier to offer long-term, reliable service.
We are one of India’s largest SS 904L buttweld fittings supplier in Mumbai, Save 10% – 15% by ordering online
Stainless steel 904L pipe fittings
A403 WP904L elbow
Stainless steel 904L fittings
The demand for these pipe fittings is rising across industries, mainly for air pollution control and metallurgical processing. The lead time for stainless steel 904L fittings is 7 to 15 working days. But the availability depends on order volumes.
Suppliers with a sizable repository with multiple sizes and types – like a Werkstoff Nr. 1.4539 end cap – will be able to hasten deliveries. Scalable logistics partners provide attractive lead times.
We are here to assist you with any UNS N08904 tee and reducer required to satisfy the requirements of your project as a stockist of stainless steel 904L fittings.
Table of Content
| Schedule | Applications | 904 Fittings Type |
|---|---|---|
| SCH 5 to XXS |
|
Elbow, reducer, tee, cap, stub end |
| Specification | 904 Fittings Process | Testing methods |
| ASTM A403 / ASME SA403 | Seamless, fabricated, welded |
|
| 904 Fittings Sizes | Standard | Hardness |
|  1/2″ to 48″ | ASME B16.9/ ASME B16.28 | 70-90 HRB |
Here you can easily find a large variety of WNR 1.4539 stub ends and end caps at factory prices with all required paperwork.
SS 904L buttweld fittings
- Testing methods: proof test, hydrotest, NDT test, destructive
ASTM A403 WP 904L tee
- Application: petrochemical, Chemical, oil and gas
- Sizes: 1/2″ to 48″
SS 904L reducer
- Thickness: 1.5MM to 20MM
- Hardness: 70-90 HRB
UNS N08904 stub end
- Schedule: SCH 5 to SCH XXS
- Tensile strength : 490 MPa
SS 904L pipe fittings
- Standard: ASME B16.9/ ASME B16.28 fittings
- Yield strength : 220 MPa
Werkstoff nr. 1.4539 end cap
- Methods: Seamless, welded, buttweld fittings
- Temperature: 800°F – 1500°F
| NPS for 904l fittings | KG | LBS |
|---|---|---|
| 2-1¼ | 0.54 | 1.2 |
| 2-1½ | 0.59 | 1.3 |
| 2-3/4 | – | – |
| 2-1 | 0.5 | 1.1 |
| 2½-1½ | 1 | 2.2 |
| 2½-2 | 1.11 | 2.45 |
| 2½-1 | – | – |
| 3-2½ | 1.88 | 4.15 |
| 2½-1¼ | 0.95 | 2.1 |
| 3-1½ | 1.45 | 3.2 |
| 3-1¼ | – | – |
| 3-2 | 1.59 | 3.5 |
| 3½-3 | 2.72 | 6 |
| 3½-2 | 2.04 | 4.5 |
| 3½-1½ | – | – |
| 3½-2½ | 2.45 | 5.4 |
| 3½-1¼ | – | – |
| 4-3 | 3.4 | 7.5 |
| 4-3½ | 3.72 | 8.2 |
| 4-2 | 2.7 | 5.95 |
| 4-1½ | – | – |
| 4-2½ | 4.76 | 10.5 |
| 5-4 | 5.94 | 13.1 |
| 5-3 | 5.17 | 11.4 |
| 5-3½ | 5.53 | 12.2 |
| 5-2½ | 4.76 | 10.5 |
| 6-5 | 9.39 | 20.7 |
| 5-2 | – | – |
| 6-4 | 8.35 | 18.4 |
| 6-3 | 7.44 | 16.4 |
| 6-3½ | 7.85 | 17.3 |
| 6-2½ | – | – |
| 8-5 | 16.1 | 35.5 |
| 8-6 | 17.78 | 39.2 |
| 8-4 | 14.7 | 32.4 |
| 10-8 | 32.3 | 71.2 |
| 8-3½ | – | – |
| 10-6 | 27.76 | 61.2 |
| 10-4 | – | – |
| 10-5 | 25.72 | 56.7 |
| 12-8 | 43.77 | 96.5 |
| 12-10 | 50.58 | 111.5 |
| 12-6 | 38.42 | 84.7 |
| NPS (Normal Pipe Size) | OD(Outside Daimeter) | 45 Deg Elbow Fittings | 90 Deg Elbow Fittings | 180 Deg Return Elbow | ||||
|---|---|---|---|---|---|---|---|---|
| (inch) | Long Radius Elbow | Short Radius | Long Radius Elbow | Long Radius Elbow | ||||
| inch | mm | Radius (Inch) |
Center to Face (Inch) |
Center to Face (Inch) |
Center to Face (Inch) |
Back to face (Inch) |
Center to Center (Inch) |
|
| 3/4 | 1.050 | 26.7 | 7/16 | – | 1 1/8 | 1 11/16 | 2 1/4 | |
| 1/2 | 0.840 | 21.3 | 5/8 | – | 1 1/2 | 1 7/8 | 2 | |
| 1 1/4 | 1.660 | 42.2 | 1 | 1 1/4 | 1 7/8 | 2 3/4 | 3 3/4 | |
| 1 | 1.315 | 33.4 | 7/8 | 1 | 1 1/2 | 2 3/16 | 3 | |
| 1 1/2 | 1.900 | 48.3 | 3 | 1 1/8 | 1 1/2 | 2 1/4 | 3 1/4 | 4 1/2 |
| 2 1/2 | 2.875 | 73.0 | 5 | 1 3/4 | 2 1/2 | 3 3/4 | 5 3/16 | 7 1/2 |
| 2 | 2.375 | 60.3 | 4 | 1 3/8 | 2 | 3 | 4 3/16 | 6 |
| 3 1/2 | 4.000 | 101.6 | 7 | 2 1/4 | 3 1/2 | 5 1/4 | 7 1/4 | 10 1/2 |
| 3 | 3.500 | 88.9 | 6 | 2 | 3 | 4 1/2 | 6 1/4 | 9 |
| 5 | 5.563 | 141.3 | 10 | 3 1/8 | 5 | 7 1/2 | 10 5/16 | 15 |
| 4 | 4.500 | 114.3 | 8 | 2 1/2 | 4 | 6 | 8 1/4 | 12 |
| 6 | 6.625 | 168.3 | 12 | 3 3/4 | 6 | 9 | 12 5/16 | 18 |
| 10 | 10.750 | 273.1 | 15 | 6 1/4 | 10 | 15 | 20 3/8 | 30 |
| 8 | 8.625 | 219.1 | 12 | 5 | 8 | 12 | 16 5/16 | 24 |
| 12 | 12.750 | 323.9 | 18 | 7 1/2 | 12 | 18 | 24 3/8 | 36 |
- MSS SP-43
- ASME B16.9
- ASME SA403/ASTM A403
| 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 | |
| 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 | ||||
| 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 | |||
| 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″ |
The only place you’ll find affordable 904l stainless steel seamless and welded fittings widely used in gas scrubbing plants, seawater cooling devices
| C | Cu | Mn | Cr | Mo | P | Ni | S |
|---|---|---|---|---|---|---|---|
| Maximum | Maximum | Maximum | Maximum | ||||
| 0.02 | 2.0 | 4.0-5.0 | 19.0-23.0 | 23.0-28.0 | 0.035 | 0.045 | 1.0 |
| Grade | Tensile Strength (MPa) minimum | Elongation (% in 50mm) minimum | Yield Strength 0.2% Proof (MPa) minimum | Hardness | |
|---|---|---|---|---|---|
| Rockwell B (HR B) | Brinell (HB) | ||||
| 904L | 490 | 36 | 220 | 70-90 typical | 150 |
| STANDARD | UNS | WERKSTOFF NR. | JIS | KS | AFNOR | BS | EN |
|---|---|---|---|---|---|---|---|
| SS 904L Fittings | N08904 | 1.4539 | SUS 904L | STS 317J5L | Z2 NCDU 25-20 | 904S13 | X1NiCrMoCu25-20-5 |
| Grades | (µm/m/°C) Mean Co-eff of Thermal Expansion | Density (kilogram/meter3) |
Elastic Modulus (GPa) |
Specific Heat 0-100°C (J/kg.K) |
(W/m.K)Thermal Conductivity | Elec Resistivity (nΩ.m) |
|||
|---|---|---|---|---|---|---|---|---|---|
| 0-315°C | 0-100°C | 0-538°C | At 500°C | At 20°C | |||||
| 904L Fittings | 15 | 7900 | 190 | 500 | 11.5 | 952 | |||
The schedule of the fittings varies with the wall thickness and the inner diameter. SS 904L buttweld fittings of Schedule 80 are appropriate for a thicker wall but a smaller inner diameter. Schedule 40 can handle lower pressure.
These metrics depend on nominal pipe size (a dimensionless approximation of outer pipe diameter). The correct schedule for a UNS N08904 stub end is critical for the safety, performance, and durability of the pipe.
Corrosion resistance is a hallmark of these fittings, thanks to their chemical composition comprising nickel, copper, and molybdenum (4.5%). An ASTM A403 WP 904L stainless steel buttweld tee exhibits medium to high corrosion resistance in various forms: stress cracking, pitting, and general. The range of chemicals it can handle includes chlorides, dilute sulphuric acids, phosphoric, and organic acids.
A reducer is indispensable for connecting pipes of different diameters. An SS 904L reducer works in numerous industries, including the pharmaceutical sector and refineries.
- These reducers are available as eccentric (can connect to the side) and concentric (more common).
- Its high corrosion resistance makes it perfect for applications exposed to acids and seawater.
- A BS 904S13 reducer gets welded easily, even without using a filler.
- This material is ductile and formable, with a high tensile strength of 490 MPa. But it may require specific tools because of the addition of elements like molybdenum and nitrogen.
- It has a high melting point: 1300 to 1390°C.
- It has a Brinell hardness of 150 HB.