Stainless Steel Fittings
SS Pipe Fittings A403 316Ti
SS Pipe Fittings A403 316Ti Supplier, ASTM A403 WP316Ti Stainless Steel Fittings, Reliable Pipes & Tubes.
Reliable Pipes & Tubes – Leading SS Pipe Fittings A403 316Ti Supplier
Reliable Pipes & Tubes is a leading supplier, stockholder, and exporter of high-grade SS Pipe Fittings A403 316Ti. SS Pipe Fittings A403 316Ti refers to ASTM A403 standard covering wrought titanium-stabilized austenitic stainless steel piping fittings for pressure service in the WP316Ti grade. The addition of titanium (minimum 5 times carbon plus nitrogen content) in SS Pipe Fittings A403 316Ti prevents sensitization and chromium carbide precipitation at grain boundaries during welding or high-temperature service (up to 1500°F).
The SS Pipe Fittings A403 316Ti 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 316Ti from 1/2" NB to 48" NB in various schedules to meet custom applications. Every SS Pipe Fittings A403 316Ti 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 316Ti?
SS Pipe Fittings A403 316Ti refers to ASTM A403 standard for wrought austenitic stainless steel piping fittings, specifically the WP316Ti titanium-stabilized variant. The SS Pipe Fittings A403 316Ti 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 316Ti is its titanium stabilization, which allows the fittings to withstand prolonged exposure to elevated temperatures in corrosive environments without experiencing intergranular corrosion. All SS Pipe Fittings A403 316Ti should be supplied in heat treated condition and all welding work should be done before heat treatment.
SS Pipe Fittings A403 316Ti Quick Details
| Parameter |
Details |
| Company Name | Reliable Pipes & Tubes |
| Country/Region | India |
| FOB Price | US $2400 - $7200 / 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 316Ti Specifications
| Specification Heading |
Details |
| Specification | ASTM A403 / ASME SA403 |
| Grade | WP316Ti |
| UNS Number | S31635 |
| DIN / EN | 1.4571 |
| 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 316Ti
| 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 |
Physical Properties of SS Pipe Fittings A403 316Ti
| Property |
Value |
| Density | 7.99 g/cm3 (0.29 lb/in3) |
| Melting Point | 1371 – 1399 °C (2500 – 2550 °F) |
| Annealed Temperature | 1040 °C (1900 °F) |
| Quench Method | Rapid Air/Water |
| Modulus of Elasticity | 193 GPa |
Chemical Composition of SS Pipe Fittings A403 316Ti
| Element |
Min (%) |
Max (%) |
| Carbon (C) | - | 0.08 |
| Chromium (Cr) | 16.00 | 18.00 |
| Nickel (Ni) | 10.00 | 14.00 |
| Molybdenum (Mo) | 2.00 | 3.00 |
| Titanium (Ti) | 5 x (C+N) | 0.70 |
| Silicon (Si) | - | 0.75 |
| Manganese (Mn) | - | 2.00 |
| Phosphorus (P) | - | 0.045 |
| Sulfur (S) | - | 0.030 |
| Nitrogen (N) | - | 0.10 |
* Note: Titanium stabilization is the key characteristic of SS Pipe Fittings A403 316Ti, preventing carbide precipitation during thermal operations.
Mechanical Properties of SS Pipe Fittings A403 316Ti
| Property |
Value |
| Tensile Strength, min | 515 MPa (75 ksi) |
| Yield Strength 0.2% Offset, min | 205 MPa (30 ksi) |
| Elongation, min % | 35% |
| Hardness Brinell (HB), max | 217 |
Equivalent Grades For SS Pipe Fittings A403 316Ti
| STANDARD |
WERKSTOFF NR. |
UNS |
JIS |
BS |
EURONORM / EN |
| WP316Ti |
1.4571 |
S31635 |
SUS 316Ti equivalent |
- |
X6CrNiMoTi17-12-2 |
| WP316L |
1.4404 |
S31603 |
SUS 316L |
316S11 |
X2CrNiMo17-12-2 |
| WP316 |
1.4401 |
S31600 |
SUS 316 |
316S31 |
X5CrNiMo17-12-2 |
* Note: These comparisons are approximate only. If exact equivalents are needed original specifications must be consulted.
SS Pipe Fittings A403 316Ti Dimensions
1. SS Pipe Fittings A403 316Ti 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 316Ti 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 316Ti 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 316Ti
| Fitting Type |
Description |
| Elbow | SS Pipe Fittings A403 316Ti – 45°, 90°, 180° elbows, including 1.5D and 3D/5D radius elbows for flow direction change |
| Tee | SS Pipe Fittings A403 316Ti – Equal tees and reducing/unequal tees for branch connections |
| Cap | SS Pipe Fittings A403 316Ti – End caps / pipe end caps for closing pipe ends |
| Reducer | SS Pipe Fittings A403 316Ti – Concentric and eccentric reducers for size reductions |
| Coupling | SS Pipe Fittings A403 316Ti – Couplings for joint connections |
| Nipple | SS Pipe Fittings A403 316Ti – Barrel nipples, reducing nipples, swage nipples |
| Bend | SS Pipe Fittings A403 316Ti – Long radius bends, short radius bends, piggable bends, induction bends |
| Olets | SS Pipe Fittings A403 316Ti – Weldolets, sockolets, threadolets for high-temperature branching |
| Stub End | SS Pipe Fittings A403 316Ti – Lap joint stub ends for flanged connections |
SS Pipe Fittings A403 316Ti ASTM A403 Standard Scope
The ASTM A403 standard for SS Pipe Fittings A403 316Ti 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 316Ti 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 316Ti 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 316Ti 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 316Ti
- Surface crack (fish scales) deeper than 1/64 inch (0.4 mm) should be removed from SS Pipe Fittings A403 316Ti
- Mechanical flaws deeper than 1/16 inch (1.6 mm) should be removed from SS Pipe Fittings A403 316Ti
- SS Pipe Fittings A403 316Ti shall not have a surface discontinuity deeper than 5% of the specified nominal wall thickness
- SS Pipe Fittings A403 316Ti shall have a good machined surface and shall be free of scale and passivated
Repair by Welding Allowance for SS Pipe Fittings A403 316Ti
- When the defect depth exceeds 33 1/3% of the nominal wall thickness in SS Pipe Fittings A403 316Ti, weld repair is not allowed
- When the defect area exceeds 10% of the surface area of SS Pipe Fittings A403 316Ti, weld repair is not allowed
- Unacceptable defects should be removed by mechanical means or by thermal cutting or gouging methods
- SS Pipe Fittings A403 316Ti shall be free of scale and shall be passivated
SS Pipe Fittings A403 316Ti Stock List
- SS Pipe Fittings A403 316Ti – 90 Deg Elbow (Long / Short Radius / 3R)
- SS Pipe Fittings A403 316Ti – 45 Deg Elbow
- SS Pipe Fittings A403 316Ti – 180 Deg Return Bend
- SS Pipe Fittings A403 316Ti – Equal / Reducing Tee
- SS Pipe Fittings A403 316Ti – Concentric / Eccentric Reducer
- SS Pipe Fittings A403 316Ti – End Cap / Pipe Cap
- SS Pipe Fittings A403 316Ti – Lap Joint Stub End
- SS Pipe Fittings A403 316Ti – Barrel / Swage Nipple
- SS Pipe Fittings A403 316Ti – Piggable / Induction Bend (R=3D, 5D, 10D)
- SS Pipe Fittings A403 316Ti – Weldolets / Sockolets / Cross / Lateral
Testing Requirements for SS Pipe Fittings A403 316Ti
| 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 WP316Ti requirements |
| Visual Inspection | All SS Pipe Fittings A403 316Ti 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 316Ti |
| Hydrostatic Test | As required per applicable standards |
| Hardness Test | Rockwell and Brinell hardness testing as required |
SS Pipe Fittings A403 316Ti Price List
| Product Description |
Price (FOB) |
| SS Pipe Fittings A403 316Ti – Elbow | US $3.00 - 25.00 / Piece |
| SS Pipe Fittings A403 316Ti – Tee | US $4.00 - 30.00 / Piece |
| SS Pipe Fittings A403 316Ti – Reducer | US $3.50 - 28.00 / Piece |
| SS Pipe Fittings A403 316Ti – Cap | US $2.20 - 18.00 / Piece |
| SS Pipe Fittings A403 316Ti – Coupling | US $1.50 - 12.00 / Piece |
| SS Pipe Fittings A403 316Ti – Bend | US $6.50 - 75.00 / Piece |
| SS Pipe Fittings A403 316Ti – Per Ton | US $2700 - 6200 / 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 316Ti 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