DIPTI METAL INDUSTRIES
ASTM A403 WP316 Stainless Steel Butt-Weld Fittings
Molybdenum-alloyed austenitic stainless steel for enhanced pitting & crevice corrosion resistance in chloride-containing and acidic environments. Ideal for marine, chemical, pharmaceutical, pulp & paper applications. Types: elbows, tees, reducers, caps, crosses, stub ends, laterals. NPS 1/2″–48″, schedules SCH 5S–XXS. Full traceability with EN 10204 3.1 MTC; TPI on request.
🏭 Company Introduction
Dipti Metal Industries, founded in 2009 in Mumbai, India, is a globally trusted manufacturer, exporter & stockist of ASTM A403 WP316 stainless steel butt-weld fittings. Our brand Dipti® stands for unwavering quality, consistent metallurgical performance, and reliable on-time delivery across 60+ export markets and to 190+ countries. We engineer corrosion-resistant piping components for stringent specifications in marine, chemical processing, pharmaceutical, and pulp & paper industries.
Why Dipti
- Seamless & welded fittings: elbows, tees, reducers, caps, crosses, stub ends, laterals
- Large dies & ready stock for rapid deliveries
- PMI, NDE (UT/RT/MT/PT), dimensional & documentation packs
- PED/CE/IBR support; TPI by BV, TÜV, LR, SGS, DNV
Compliance & QA
- Standards: ASME B16.9, B16.28, MSS SP-43, EN 10253-3/4, JIS B2312
- Certificates: EN 10204 3.1 MTC with full heat traceability
- QAP/ITP, HT charts, hardness/impact/tensile on request
- Seaworthy packing; line-wise bagging & tagging
📘 Grade Overview: WP316 (UNS S31600 / EN 1.4401)
Typical Chemical Composition (%)
| Element | Min | Max |
|---|---|---|
| C | — | 0.08 |
| Mn | — | 2.00 |
| P | — | 0.045 |
| S | — | 0.030 |
| Si | — | 1.00 |
| Cr | 16.0 | 18.0 |
| Ni | 10.0 | 14.0 |
| Mo | 2.00 | 3.00 |
Values indicative; actual limits per ASTM A403/A403M and product form.
Typical Mechanical Properties (Room Temp)
| Property | Value | Unit |
|---|---|---|
| Tensile Strength (Rm) | ≥ 515 | MPa |
| Yield Strength (Rp0.2) | ≥ 205 | MPa |
| Elongation (A) | ≥ 40 | % |
| Hardness | ≤ 217 HB (~95 HRB) | — |
Performance depends on size, schedule, and final heat treatment.
Common equivalents: UNS S31600 = EN 1.4401 ≈ JIS SUS 316 ≈ AISI/TP 316. Check project specs for exact substitutability.
📚 Key Standards & Specifications
| Category | Standard | Title / Scope | Remarks |
|---|---|---|---|
| Fittings (Dimensions) | ASME B16.9 | Factory-Made Wrought Buttwelding Fittings | LR/SR elbows, tees, reducers, caps |
| Fittings (Returns) | ASME B16.28 | Wrought BW Fittings — LR/SR Returns | Short radius elbows/returns |
| Thin-Wall Fittings | MSS SP-43 | Wrought & Fabricated BW Fittings | Common for stainless schedules |
| Material / Wrought | ASTM A403 / A403M | Wrought Austenitic SS Piping Fittings | WP316, WP316L, WP316H |
| EN Fittings | EN 10253-3/4 | Butt-welding pipe fittings (stainless) | European projects |
| JIS | JIS B2312 | Butt-welding pipe fittings | Regional projects |
| Certs | EN 10204 | Metallic products — inspection docs | MTC 3.1 supplied |
| Compliance | PED / CE / IBR | EU Pressure Equipment • India Boiler Reg. | Support on request |
🔧 Product Range — WP316 Butt-Weld Fittings
| Type | Forms | Sizes / Schedules | Notes |
|---|---|---|---|
| Elbows | LR 90°/45°/180°, SR 90°/180°, custom bends | NPS 1/2″–48″, SCH 5S–XXS | ASME B16.9/B16.28; seamless & welded |
| Tees | Equal, reducing, barred, lateral (45°/90°) | NPS 1/2″–48″, SCH 5S–XXS | MSS SP-43 thin-wall option |
| Reducers | Concentric, eccentric | NPS 1/2″–48″, SCH 5S–XXS | Smooth transition for corrosive media |
| Type | Forms | Sizes / Schedules | Notes |
|---|---|---|---|
| Caps | Seamless & welded | NPS 1/2″–48″, SCH 5S–XXS | End closures for corrosive lines |
| Stub Ends | Long pattern, short pattern | NPS 1/2″–48″ | For lap joint flanges (MSS SP-43) |
| Crosses | Equal, reducing | NPS 1/2″–24″ (typ.) | For complex networks |
| Laterals | Seamless & welded | NPS 1″–24″ (typ.) | Angled branches for distribution |
Finish options: solution annealed, pickled & passivated. PMI available. Exact availability by item and size on request.
⭐ Customer Reviews
- 4.9/5 — Kevwe Ogheneovo, Buyer in Nigeria: “Reliable WP316 fittings, fast docs and on-time delivery.”
- 4.9/5 — S. Ravishankar, Buyer in Chennai (India): “Excellent elbows & reducers; great anti-corrosion performance.”
Average rating 4.9 based on recent client feedback.
🌍 Global Export Coverage
We export to all major industrial regions worldwide. Below is the complete country list.
Africa
Algeria,
Angola,
Benin,
Botswana,
Burkina Faso,
Burundi,
Cabo Verde,
Cameroon,
Central African Republic,
Chad,
Comoros,
Congo (Republic),
Congo (DRC),
Côte d’Ivoire,
Djibouti,
Egypt,
Equatorial Guinea,
Eritrea,
Eswatini,
Ethiopia,
Gabon,
Gambia,
Ghana,
Guinea,
Guinea-Bissau,
Kenya,
Lesotho,
Liberia,
Libya,
Madagascar,
Malawi,
Mali,
Mauritania,
Mauritius,
Morocco,
Mozambique,
Namibia,
Niger,
Nigeria,
Rwanda,
São Tomé & Príncipe,
Senegal,
Seychelles,
Sierra Leone,
Somalia,
South Africa,
South Sudan,
Sudan,
Tanzania,
Togo,
Tunisia,
Uganda,
Zambia,
Zimbabwe
Americas
Antigua & Barbuda,
Argentina,
Bahamas,
Barbados,
Belize,
Bolivia,
Brazil,
Canada,
Chile,
Colombia,
Costa Rica,
Cuba,
Dominica,
Dominican Republic,
Ecuador,
El Salvador,
Grenada,
Guatemala,
Guyana,
Haiti,
Honduras,
Jamaica,
Mexico,
Nicaragua,
Panama,
Paraguay,
Peru,
Saint Kitts & Nevis,
Saint Lucia,
Saint Vincent & the Grenadines,
Suriname,
Trinidad & Tobago,
United States,
Uruguay,
Venezuela
Asia
Afghanistan,
Armenia,
Azerbaijan,
Bahrain,
Bangladesh,
Bhutan,
Brunei,
Cambodia,
China,
Cyprus,
Georgia,
India,
Indonesia,
Iran,
Iraq,
Israel,
Japan,
Jordan,
Kazakhstan,
Kuwait,
Kyrgyzstan,
Laos,
Lebanon,
Malaysia,
Maldives,
Mongolia,
Myanmar,
Nepal,
North Korea,
Oman,
Pakistan,
Palestine,
Philippines,
Qatar,
Saudi Arabia,
Singapore,
South Korea,
Sri Lanka,
Syria,
Taiwan,
Tajikistan,
Thailand,
Timor-Leste,
Turkey,
Turkmenistan,
United Arab Emirates,
Uzbekistan,
Vietnam,
Yemen,
Russia
Europe
Albania,
Andorra,
Austria,
Belarus,
Belgium,
Bosnia & Herzegovina,
Bulgaria,
Croatia,
Czechia,
Denmark,
Estonia,
Finland,
France,
Germany,
Greece,
Hungary,
Iceland,
Ireland,
Italy,
Kosovo,
Latvia,
Liechtenstein,
Lithuania,
Luxembourg,
Malta,
Moldova,
Monaco,
Montenegro,
Netherlands,
North Macedonia,
Norway,
Poland,
Portugal,
Romania,
Russia,
San Marino,
Serbia,
Slovakia,
Slovenia,
Spain,
Sweden,
Switzerland,
Ukraine,
United Kingdom,
Vatican City
Oceania
Australia,
Fiji,
Kiribati,
Marshall Islands,
Micronesia,
Nauru,
New Zealand,
Palau,
Papua New Guinea,
Samoa,
Solomon Islands,
Tonga,
Tuvalu,
Vanuatu
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📍 Contact
Company
Dipti Metal Industries
Address
No.9, Shreepati Castle, D-1, 10–11th Khetwadi Back Road, Mumbai – 400004, Maharashtra, India
Phone +91-22-66381301 • +91-9975266499 (WhatsApp)
Email info@diptimetal.com • diptimetal@gmail.com
Seaworthy export packing • Line-wise bagging & tagging • Complete documentation & TPI.