SS 316 Stainless Steel Pipe Fittings & Flanges.
Stainless steel pipe fittings and flange enquiries for industrial piping, plant maintenance and process systems.
Can’t find your grade? Send it — we’ll source it.
Our stockist and mill sourcing network extends beyond the grades listed here. Send rare grades, unusual forms and small-quantity requirements for sourcing review.
One enquiry gives us the details to check suitable sources across the network and help move your purchase forward. Share the exact grade, standard, form, size, quantity, delivery town and required date. We’ll confirm availability, minimum order quantity and lead time against your requirement.
Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request.
Quick details
| Material grade | SS 316 (UNS S31600) |
|---|---|
| Standard | ASTM A403 WP316 |
| Type | Elbows 45°, 90° and 180°, Equal and reducing tees, Concentric and eccentric reducers, Caps, stub ends and crosses |
| Size range | 1/2" to 24" NB seamless; larger welded on enquiry |
| Usage / application | Chemical and petrochemical process lines, Marine and coastal fabrication, Pharmaceutical equipment |
| Test certificate | Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request. |
| Business type | Stockist and supplier |
| Location | 231/235, Sant Sena Maharaja Marg, Mumbai, Maharashtra 400004, India |
Also searched as: SS 316 fitting, 316 stainless steel fitting, stainless steel 316 fitting, ASTM A403 WP316 fitting, UNS S31600 fitting, 1.4401 fitting
Product information for purchasing teams
Stainless steel pipe fittings and flange enquiries for industrial piping, plant maintenance and process systems. Exact specification, availability and commercial details are confirmed against your enquiry.
Industrial pipework and process systems. Correct selection depends on pressure class, piping standard, grade, dimensions and service conditions.
Standards and specifications
Wrought austenitic stainless steel fittings: ASTM A403 WP316 / WP316L. Forged stainless steel flanges: ASTM A182 F316 / F316L. Specify the material standard, grade, schedule or pressure class, facing and dimensional standard separately for each item.
Grades and material families
SS 316 / 316L and other specified stainless grades, subject to requirement and sourcing confirmation.
Forms and supply options
Elbows, tees, reducers, caps, butt-weld fittings and flange types as specified in the enquiry.
Separate fitting and flange requirements
The detailed fitting specifications below concern wrought butt-weld fittings. Forged flanges have a separate material specification; fitting schedules and flange pressure classes are not interchangeable.
| Flange material standard | ASTM A182 F316 or F316L, as specified |
|---|---|
| Flange RFQ details | Type, nominal size, pressure class, facing, bore, dimensional standard and quantity |
SS 316 Butt-weld Fittings specifications
| Material standard | ASTM A403 WP316 |
|---|---|
| Grade | SS 316, UNS S31600, W.Nr 1.4401 |
| Size range | 1/2" to 24" NB seamless; larger welded on enquiry |
| Schedules | To match pipe: Sch 5S to XXS |
| Dimensional standards | ASME B16.9, ASME B16.28, MSS SP-43; forged socket-weld and threaded to ASME B16.11 |
| Radius | Long radius and short radius elbows; 3D and 5D bends on enquiry |
| Inspection | Third-party inspection on request |
| Documents | Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request. |
Related designation references
| Grade | UNS | Werkstoff Nr. | EN / BS | JIS |
|---|---|---|---|---|
| SS 316 | S31600 | 1.4401 | X5CrNiMo17-12-2 | SUS 316 |
Cross-standard references are not automatic substitutes. Confirm the exact product form, specification, composition, class and condition before accepting a substitution.
Composition and mechanical properties
Composition and mechanical requirements depend on the product form and specification. Specify ASTM A403 WP316 and confirm the grade, class, condition, dimensions and applicable limits against the purchase specification and mill test certificate.
Types we supply
- Elbows 45°, 90° and 180°
- Equal and reducing tees
- Concentric and eccentric reducers
- Caps, stub ends and crosses
Applications
- Chemical and petrochemical process lines
- Marine and coastal fabrication
- Pharmaceutical equipment
- Pulp and paper machinery
What to include in your RFQ
Share the exact grade and standard, product dimensions, quantity, required delivery location and any inspection or material certificate requirements. This helps the team review the specification and confirm availability before quotation.
Questions buyers ask
Should I choose 304 or 316?
316 contains molybdenum, which improves resistance to some forms of corrosion. Grade selection still depends on the medium, concentration, temperature, fabrication and service conditions. Confirm suitability with the project specification rather than treating either grade as suitable for every chloride environment.
Which standard covers SS 316 Butt-weld Fittings?
SS 316 Butt-weld Fittings are supplied to ASTM A403 WP316.
What sizes of SS 316 Butt-weld Fittings does Steel Impex India supply?
Size range: 1/2" to 24" NB seamless; larger welded on enquiry. Schedules: To match pipe: Sch 5S to XXS. Exact availability is confirmed for each enquiry.
Do SS 316 Butt-weld Fittings come with a mill test certificate?
Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request.
What should I send for the SS 316 Butt-weld Fittings quotation?
Send fitting type, size, schedule, radius, quantity and certificate type.
Where is Steel Impex India located?
Steel Impex India is at 231/235, Sant Sena Maharaja Marg, Mumbai, Maharashtra 400004, India We supply across India.