Stainless Steel Fittings
SS Pipe Fittings A403 347
SS Pipe Fittings A403 347 Supplier, ASTM A403 WP347 Stainless Steel Fittings, Reliable Pipes & Tubes.
Reliable Pipes & Tubes – Leading SS Pipe Fittings A403 347 Supplier
Reliable Pipes & Tubes is a leading supplier, stockholder, and exporter of high-grade SS Pipe Fittings A403 347. SS Pipe Fittings A403 347 refers to ASTM A403 standard covering wrought columbium/niobium-stabilized austenitic stainless steel piping fittings for pressure service in the WP347 grade. The addition of columbium and tantalum (minimum 10 times the carbon content) in SS Pipe Fittings A403 347 stabilizes the material against chromium carbide precipitation, securing superior resistance to intergranular corrosion when exposed to temperatures in the carbide precipitation range of 800°F to 1500°F.
The SS Pipe Fittings A403 347 are designed for forged steel pipe fittings and can be used in many critical engineering fields including chemical processing, food and beverage, marine, power generation, pressure vessels, boilers, and other elevated temperature environments. Material under ASTM A403 is named as WP Grade, and for each WP grade stainless steel, several categories of pipe fittings are included to indicate that a seamless or welded structure is used.
We offer a comprehensive range of SS Pipe Fittings A403 347 from 1/2" NB to 48" NB in various schedules to meet custom applications. Every SS Pipe Fittings A403 347 supplied by Reliable Pipes & Tubes undergoes rigorous testing including tensile testing, chemical analysis, and visual inspection to ensure optimal quality and structural integrity.
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What is SS Pipe Fittings A403 347?
SS Pipe Fittings A403 347 refers to ASTM A403 standard for wrought austenitic stainless steel piping fittings, specifically the WP347 niobium-stabilized variant. The SS Pipe Fittings A403 347 are specifically designed for forged steel pipe fittings; cast pipe fittings are not suitable under this standard. The key advantage of SS Pipe Fittings A403 347 is its stabilization with niobium (columbium) and tantalum, which prevents sensitization during welding and ensures excellent resistance to intergranular corrosion in high-temperature settings. All SS Pipe Fittings A403 347 should be supplied in heat treated condition and all welding work should be done before heat treatment.
SS Pipe Fittings A403 347 Quick Details
| Parameter |
Details |
| Company Name | Reliable Pipes & Tubes |
| Country/Region | India |
| FOB Price | US $2500 - $7500 / Metric Ton |
| Port | Nhava Sheva Port, Mumbai |
| Main Products | Pipe Fittings, Elbows, Tees, Reducers, Caps, Flanges |
| Certification | ISO 9001, ISO 14001 & OHSAS 18001 |
SS Pipe Fittings A403 347 Specifications
| Specification Heading |
Details |
| Specification | ASTM A403 / ASME SA403 |
| Grade | WP347 |
| UNS Number | S34700 |
| DIN / EN | 1.4550 |
| Types | Seamless or Welded |
| Dimension Range | 1/2" NB to 48" NB (15 NB to 1200 NB) |
| Wall Thickness Range | Schedule 5S, Schedule 10S, Schedule 40S, Schedule 80S, Schedule 160S, Schedule XXS |
| Dimension Standards | ASME B16.9, ASME B16.11, ASME B16.28, MSS SP-43, MSS SP-79, MSS SP-95, MSS SP-97, BS3799, BS21, ISO 4144, DIN 2605, DIN 2615, DIN 2616 |
| Fitting Types | Elbow, Tee, Cap, Reducer, Coupling, Nipple, Bend, Olets, Stubend, Cross |
| Surface Finish | Pickled, Annealed & Pickling, Shot Blasted, Passivated |
| Ends | Plain Ends, Beveled Ends, Threaded Ends |
| Packaging | Wooden Pallet / Wooden Box / Plastic Cloth Wraps / Plastic End Caps |
| Material Test Certificate | EN10204 3.1, 3.2 / Laboratory Test Certificate from NABL Approved Lab. / Under Third Party Inspection Agency like SGS, TUV, DNV, LLOYDS, ABS etc. |
| Equivalent Standards | GOST, AWWA, BS, SS, KS, AISI, JIS, GB, IS, ISO, SAE, DIN, NFA, API, ASTM, CSA, ANSI, EN, UNI |
Referred Standards of SS Pipe Fittings A403 347
| Standard |
Description |
| ASTM A182/A182M | Forged or rolled alloy steel pipe flanges, forged fittings and valves and parts for high temperature service |
| ASTM A403/A403M | Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings |
| ASTM A815/A815M | Wrought ferritic, ferritic/austenitic and martensitic stainless steel piping fittings |
| AS 2129 | Flanges for pipes, valves and fittings |
| ANSI/ASME B1.20.1 | Pipe threads, general purpose (inch) |
| ANSI B16.5 | Steel pipe flanges and flanged fittings |
| ANSI B16.9 | Factory-made wrought steel butt-welding fittings |
| ANSI B16.11 | Forged steel fittings socket-welding and threaded |
| ANSI B16.25 | Butt-welding ends |
| MSS SP-43 | Wrought stainless steel butt-welding fittings |
| MSS SP-95 | Swage(d) Nipples and Bull Plugs |
| BS 21 | Threading |
| ISO 4144 | Stainless steel fittings threaded to ISO 7-1 |
| BS 3799 | Specification for Steel pipe fittings, screwed and Socket-welding for the petroleum industry |
| ASME B16.28 | Wrought Steel Buttwelding Short Radius Elbows and Returns |
| AWS A5.4, A5.9, A5.11, A5.14 | Welding Consumables Standards |
Chemical Composition of SS Pipe Fittings A403 347
| Element |
Min (%) |
Max (%) |
| Carbon (C) | - | 0.08 |
| Chromium (Cr) | 17.00 | 19.00 |
| Nickel (Ni) | 9.00 | 13.00 |
| Columbium + Tantalum (Cb+Ta) | 10 x C | 1.00 |
| Molybdenum (Mo) | 3.00 | 4.00 |
| Silicon (Si) | - | 0.75 |
| Manganese (Mn) | - | 2.00 |
| Phosphorus (P) | - | 0.045 |
| Sulfur (S) | - | 0.030 |
| Iron (Fe) | - | Balance |
* Note: Columbium and Tantalum stabilization is the key characteristic of SS Pipe Fittings A403 347, ensuring high performance in the carbide precipitation temperature range.
Mechanical Properties of SS Pipe Fittings A403 347
| Property |
Value |
| Density | 8.0 g/cm3 |
| Melting Point | 1454 °C (2650 °F) |
| Tensile Strength, min | 515 MPa (75000 Psi) |
| Yield Strength 0.2% Offset, min | 205 MPa (30000 Psi) |
| Elongation, min % | 35% |
| Hardness Brinell (HB), max | 217 |
Equivalent Grades For SS Pipe Fittings A403 347
| STANDARD |
WERKSTOFF NR. |
UNS |
JIS |
AISI / BS |
EURONORM / EN |
| WP347 |
1.4550 |
S34700 |
SUS 347 |
347 |
X6CrNiNb18-10 |
* Note: These comparisons are approximate only. If exact equivalents are needed original specifications must be consulted.
SS Pipe Fittings A403 347 Dimensions
1. SS Pipe Fittings A403 347 Elbows and Returns Dimensions
| Nominal Pipe Size (inches) |
Outside Diameter (mm) |
Outside Diameter (inches) |
90° Elbows |
45° Elbows |
180° Returns |
| Long Radius (inches) |
Short Radius (inches) |
Long Radius (inches) |
Center to Center (inches) |
Back to Face (inches) |
| 1/2 | 21.3 | 0.840 | 1 1/2 | - | 5/8 | 3 | 1 7/8 |
| 3/4 | 26.7 | 1.050 | 1 1/8 | - | 7/16 | 2 1/4 | 1 11/16 |
| 1 | 33.4 | 1.315 | 1 1/2 | 1 | 7/8 | 3 | 2 3/16 |
| 1 1/4 | 42.2 | 1.660 | 1 7/8 | 1 1/4 | 1 | 3 3/4 | 2 7/8 |
| 1 1/2 | 48.3 | 1.900 | 2 1/4 | 1 1/2 | 1 1/8 | 4 1/2 | 3 1/4 |
| 2 | 60.3 | 2.375 | 3 | 2 | 1 3/8 | 6 | 4 3/16 |
| 2 1/2 | 73.0 | 2.875 | 3 3/4 | 2 1/2 | 1 3/4 | 7 1/2 | 5 3/16 |
| 3 | 88.9 | 3.500 | 4 1/2 | 3 | 2 | 9 | 6 1/4 |
| 3 1/2 | 101.6 | 4.000 | 5 1/4 | 3 1/2 | 2 1/4 | 10 1/2 | 7 1/4 |
| 4 | 114.3 | 4.500 | 6 | 4 | 2 1/2 | 12 | 8 1/4 |
| 5 | 141.3 | 5.563 | 7 1/2 | 5 | 3 1/8 | 15 | 10 5/16 |
| 6 | 168.3 | 6.625 | 9 | 6 | 3 3/4 | 18 | 12 5/16 |
| 8 | 219.1 | 8.625 | 12 | 8 | 5 | 24 | 16 5/16 |
| 10 | 273.1 | 10.750 | 15 | 10 | 6 1/4 | 30 | 20 3/8 |
| 12 | 323.9 | 12.750 | 18 | 12 | 7 1/2 | 36 | 24 3/8 |
2. SS Pipe Fittings A403 347 Tees, Caps, Stub Ends and Straight Crosses Dimensions
| Nominal Pipe Size (inches) |
Outside Diameter (mm) |
Outside Diameter (inches) |
Caps |
Straight Tees |
Straight Crosses |
Stub Ends |
| Length (inches) |
Center to End (inches) |
Center to End (inches) |
Lap Diameter (inches) |
Long Length (inches) |
Short Length (inches) |
| 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 1/2 | 1 7/8 | 1 7/8 | 2 1/2 | 4 | 2 |
| 1 1/2 | 48.3 | 1.900 | 1 1/2 | 2 1/4 | 2 1/4 | 2 7/8 | 4 | 2 |
| 2 | 60.3 | 2.375 | 1 1/2 | 2 1/2 | 2 1/2 | 3 5/8 | 6 | 2 1/2 |
| 2 1/2 | 73.0 | 2.875 | 1 1/2 | 3 | 3 | 4 1/8 | 6 | 2 1/2 |
| 3 | 88.9 | 3.500 | 2 | 3 3/8 | 3 3/8 | 5 | 6 | 2 1/2 |
| 3 1/2 | 101.6 | 4.000 | 2 1/2 | 3 3/4 | 3 3/4 | 5 1/2 | 6 | 3 |
| 4 | 114.3 | 4.500 | 2 1/2 | 4 1/8 | 4 1/8 | 6 1/16 | 6 | 3 |
| 5 | 141.3 | 5.563 | 3 | 4 7/8 | 4 7/8 | 7 5/16 | 8 | 3 |
| 6 | 168.3 | 6.625 | 3 1/2 | 5 5/8 | 5 5/8 | 8 1/2 | 8 | 3 1/2 |
| 8 | 219.1 | 8.625 | 4 | 7 | 7 | 10 5/8 | 8 | 4 |
| 10 | 273.1 | 10.750 | 5 | 8 1/2 | 8 1/2 | 12 3/4 | 10 | 5 |
| 12 | 323.9 | 12.750 | 6 | 10 | 10 | 15 | 10 | 6 |
3. SS Pipe Fittings A403 347 Reducers Dimensions
| Nominal Pipe Size (inches) |
Outside Diameter (mm) |
Outside Diameter (inches) |
Reduced to (inches) |
Concentric & Eccentric Length (inches) |
| 1/2 | 21.3 | 0.840 | 1/4, 3/8 | 1 1/2 |
| 3/4 | 26.7 | 1.050 | 3/8, 1/2 | 2 |
| 1 | 33.4 | 1.315 | 3/8, 1/2, 3/4 | 2 |
| 1 1/4 | 42.2 | 1.660 | 1/2, 3/4, 1 | 2 |
| 1 1/2 | 48.3 | 1.900 | 1/2, 3/4, 1, 1 1/4 | 2 1/2 |
| 2 | 60.3 | 2.375 | 3/4, 1, 1 1/4, 1 1/2 | 3 |
| 2 1/2 | 73.0 | 2.875 | 1, 1 1/4, 1 1/2, 2 | 3 1/2 |
| 3 | 88.9 | 3.500 | 1, 1 1/2, 2, 2 1/2 | 3 1/2 |
| 3 1/2 | 101.6 | 4.000 | 1 1/4, 1 1/2, 2, 2 1/2, 3 | 4 |
| 4 | 114.3 | 4.500 | 1 1/2, 2, 2 1/2, 3, 3 1/2 | 4 |
| 5 | 141.3 | 5.563 | 2, 2 1/2, 3, 3 1/2, 4 | 5 |
| 6 | 168.3 | 6.625 | 2 1/2, 3, 3 1/2, 4, 5 | 5 1/2 |
| 8 | 219.1 | 8.625 | 3, 3 1/2, 4, 5, 6 | 6 |
| 10 | 273.1 | 10.750 | 4, 5, 6, 8 | 7 |
| 12 | 323.9 | 12.750 | 5, 6, 8, 10 | 8 |
Fitting Types for SS Pipe Fittings A403 347
| Fitting Type |
Description |
| Elbow | SS Pipe Fittings A403 347 – 45°, 90°, 180° elbows, including 1D/3D/5D radius elbows for directional flow changes |
| Tee | SS Pipe Fittings A403 347 – Equal and reducing/unequal tees for branch pipe connections |
| Cap | SS Pipe Fittings A403 347 – End caps / pipe end caps for closing pipe ends |
| Reducer | SS Pipe Fittings A403 347 – Concentric and eccentric reducers for size transitions |
| Coupling | SS Pipe Fittings A403 347 – Couplings for jointing pipe systems |
| Nipple | SS Pipe Fittings A403 347 – Barrel nipples, reducing nipples, swage nipples |
| Bend | SS Pipe Fittings A403 347 – Long radius bends, short radius bends, piggable bends, induction bends |
| Olets | SS Pipe Fittings A403 347 – Weldolets, sockolets, threadolets for structural branching |
| Stub End | SS Pipe Fittings A403 347 – Lap joint stub ends (long & short length) for flanged connections |
SS Pipe Fittings A403 347 ASTM A403 Standard Scope
The ASTM A403 standard for SS Pipe Fittings A403 347 includes several grades of austenitic stainless steel alloys, and uses the WP or CR prefix to mark the grade of steel. Steel for SS Pipe Fittings A403 347 should be smelted using one of the following methods:
- Electric furnace (with separate refining optional)
- Vacuum furnace
- One of the former followed by vacuum remelting or electroslag consumable electrode remelting
- If secondary melting is used, the furnace number refers to all steel ingots remelted with one smelting furnace number
The forming or forging operation for SS Pipe Fittings A403 347 may be performed by hammer forging, press forging, perforating, extrusion, upsetting, rolling, bending, welding or machining, or two or more methods at the same time. All SS Pipe Fittings A403 347 should be supplied in heat treated condition and all welding work should be done before heat treatment.
Surface Finish Requirements for SS Pipe Fittings A403 347
- Surface crack (fish scales) deeper than 1/64 inch (0.4 mm) should be removed from SS Pipe Fittings A403 347
- Mechanical flaws deeper than 1/16 inch (1.6 mm) should be removed from SS Pipe Fittings A403 347
- SS Pipe Fittings A403 347 shall not have a surface discontinuity deeper than 5% of the specified nominal wall thickness
- SS Pipe Fittings A403 347 shall have a good machined surface and shall be free of scale and passivated
Repair by Welding Allowance for SS Pipe Fittings A403 347
- When the defect depth exceeds 33 1/3% of the nominal wall thickness in SS Pipe Fittings A403 347, weld repair is not allowed
- When the defect area exceeds 10% of the surface area of SS Pipe Fittings A403 347, weld repair is not allowed
- Unacceptable defects should be removed by mechanical means or by thermal cutting or gouging methods
- SS Pipe Fittings A403 347 shall be free of scale and shall be passivated
SS Pipe Fittings A403 347 Stock List
- SS Pipe Fittings A403 347 – 90 Deg Elbow (Long / Short Radius / 1D / 3D / 5D)
- SS Pipe Fittings A403 347 – 45 Deg Elbow
- SS Pipe Fittings A403 347 – 180 Deg Return Bend
- SS Pipe Fittings A403 347 – Equal / Reducing Tee
- SS Pipe Fittings A403 347 – Concentric / Eccentric Reducer
- SS Pipe Fittings A403 347 – End Cap / Pipe Cap
- SS Pipe Fittings A403 347 – Lap Joint Stub End
- SS Pipe Fittings A403 347 – Barrel / Swage / Reducing Nipple
- SS Pipe Fittings A403 347 – Piggable / Induction Bend (R=3D, 5D, 10D)
- SS Pipe Fittings A403 347 – Weldolets / Sockolets / Cross / Lateral
Testing Requirements for SS Pipe Fittings A403 347
| Test Type |
Details |
| Tensile Test | Longitudinal or transverse cut specimens; properties shall comply with tensile requirements per A370 methods |
| Chemical Analysis | Each cast or furnace steel chemical composition shall be determined and comply with WP347 requirements |
| Visual Inspection | All SS Pipe Fittings A403 347 shall be visually inspected for surface discontinuities |
| Liquid Penetrant Test | As per ASTM E165 Practice for Liquid Penetrant Examination for General Industry |
| Grain Size Test | As per ASTM E112 Test Methods for Determining Average Grain Size |
| Radiography Testing | 100% Radiography Tested for welded fittings where specified |
| PMI Testing | Positive Material Identification for SS Pipe Fittings A403 347 |
| Hydrostatic Test | As required per applicable standards |
| Hardness Test | Rockwell and Brinell hardness testing as required |
SS Pipe Fittings A403 347 Price List
| Product Description |
Price (FOB) |
| SS Pipe Fittings A403 347 – Elbow | US $2.80 - 24.00 / Piece |
| SS Pipe Fittings A403 347 – Tee | US $3.80 - 29.00 / Piece |
| SS Pipe Fittings A403 347 – Reducer | US $3.20 - 26.00 / Piece |
| SS Pipe Fittings A403 347 – Cap | US $2.00 - 18.00 / Piece |
| SS Pipe Fittings A403 347 – Coupling | US $1.40 - 12.00 / Piece |
| SS Pipe Fittings A403 347 – Bend | US $6.00 - 70.00 / Piece |
| SS Pipe Fittings A403 347 – Per Ton | US $2600 - 5800 / Ton |
Packaging and Sea Transportation Protection
At Reliable Pipes & Tubes, packaging is processed with standard anti-rust measures and sea transportation security rules. We ensure that your SS Pipe Fittings A403 347 reach safely and in perfect condition via the following packaging modes:
- Each fitting sleeved into plastic bag individually
- Pieces wrapped with water-proof material, bundled with nylon rope
- Wooden Boxes or Crates (steel/wooden) with separator for each radius
- End of fittings protected by plastic strips / caps
- Laminated packaging list placed with box/crate