Stainless Steel 321 Buttweld Fittings are titanium stabilized stainless steel pipe fittings made to ASTM A403 WP321 specification for high temperature and corrosion resistant applications. The fittings are used in piping systems in oil & gas, petrochemical, chemical processing and heat exchanger industries and include elbows, tees, reducers, bends and caps.
321 Pipe Fittings Butt weld Stainless Steel
Stainless Steel 321 Buttweld Fittings are austenitic stainless steel fittings stabilized with titanium for high temperature and corrosion resistant applications. These fittings exhibit good resistance to intergranular corrosion when exposed to temperatures from 800 °F to 1500 °F . Stainless Steel 321 Pipe Fittings are titanium-alloyed to improve strength and oxidation resistance at high temperatures.
We are manufacturer and exporter of wide range of Stainless Steel 321 Buttweld Pipe Fittings in seamless, welded, fabricated and tailor made forms as per international standards. Our goods line includes elbows, tees, reducers, pipe bends, stub ends, caps, crosses and unique fittings for petrochemical, oil & gas, fertilizer, pharmaceutical, food processing, marine and power producing industries.
Our ASTM A403 WP321 Buttweld Fittings are manufactured using high quality raw materials and tested under stringent quality standards to ensure durability, dimensional accuracy and leak proof performance.
Table of Contents
- ➤ 321 Pipe Fittings Butt weld Stainless Steel
- ➤ Advantages of SS 321 Buttweld Fittings
- ➤ Types of Stainless Steel 321 Buttweld Fittings
- ➤ Available Grades Equivalent to SS 321 Pipe Fittings
- ➤ ASTM A403 WP321 Buttweld Fittings Specification
- ➤ Chemical Composition of Stainless Steel 321 Pipe Fittings
- ➤ Mechanical Properties of ASTM A182 SS321 Pipe Fittings
- ➤ Stainless Steel 321 Pipe Fittings Dimensions Chart
- ➤ SS 321 Buttweld Fittings Weight Chart
- ➤ Applications of Stainless Steel 321 Pipe Fittings
- ➤ Manufacturing Process of Stainless Steel 321 Buttweld Fittings
- ➤ Why Choose Our Stainless Steel 321 Buttweld Fittings?
Advantages of SS 321 Buttweld Fittings
- Excellent High Temperature Resistance: ASTM A403 SS 321 Pipe Fittings perform efficiently in continuous exposure to elevated temperatures without losing mechanical strength.
- Superior Corrosion Resistance: These fittings provide strong resistance against oxidation, chemical corrosion, and stress corrosion cracking.
- Good Weldability: SS 321 Seamless Buttweld Fittings can be easily welded using conventional welding methods without requiring post-weld annealing.
- Long Service Life: The stabilized structure of UNS S32100 Buttweld Fittings increases durability and reduces maintenance requirements.
- Excellent Fabrication Properties: The material is easy to fabricate, form, and machine for complex industrial piping systems.
Types of Stainless Steel 321 Buttweld Fittings
We offer a complete range of SS 321 Buttweld Fittings manufactured according to ASME B16.9, MSS SP-43, and international piping standards.
Common Types Include:- 90 Degree Elbow
- 45 Degree Elbow
- Long Radius Elbow
- Short Radius Elbow
- Equal Tee
- Unequal Tee
- Concentric Reducer
- Eccentric Reducer
- Stub End
- Pipe Cap
- Cross Tee
- SS 321 Pipe Bends
- Custom Fabricated Fittings
Our ANSI B16.9 SS 321 Pipe Cap and SS 321 Pipe Bends are widely used in high-pressure and high-temperature piping systems.
Testing of UNS S32109 Seamless Fittings
To ensure product reliability, all fittings undergo multiple testing procedures:
- Positive Material Identification (PMI) Test
- Hydrostatic Testing
- Intergranular Corrosion Test
- Ultrasonic Test
- Radiographic Examination
- Hardness Test
- Flattening Test
- Eddy Current Testing
These tests confirm the integrity and quality of our ASME B16.9 SS 321 Pipe Fittings.
Available Grades Equivalent to SS 321 Pipe Fittings
| Standard | Grade |
|---|---|
| UNS | S32100 |
| WNR | 1.4541 |
| ASTM | A403 WP321 |
| EN | X6CrNiTi18-10 |
| JIS | SUS 321 |
ASTM A403 WP321 Buttweld Fittings Specification
| Specifications | Details |
|---|---|
| Product Name | Stainless Steel 321 Buttweld Fittings |
| Material Grade | SS 321 / UNS S32100 |
| Other Grade | UNS S32109 Seamless Fittings |
| Standard | ASTM A403 WP321 |
| Dimensions Standard | ASME B16.9 / ANSI B16.9 |
| Size Range | ½” NB to 48” NB |
| Thickness | SCH 5 to SCH XXS |
| Type | Seamless / Welded / Fabricated |
| Form | Elbow, Tee, Reducer, Bend, Cap |
| Pressure Rating | SCH10, SCH20, SCH40, SCH80, SCH160 |
| End Connection | Butt Weld |
| Surface Finish | Pickled, Polished, Sand Blasted |
| Testing | PMI, Hydro Test, Radiography, IGC Test |
Chemical Composition of Stainless Steel 321 Pipe Fittings
| Element | Composition (%) |
|---|---|
| Carbon | 0.08 Max |
| Manganese | 2.00 Max |
| Silicon | 1.00 Max |
| Chromium | 17.0 – 19.0 |
| Nickel | 9.0 – 12.0 |
| Titanium | 5x(C+N) Min |
| Phosphorus | 0.045 Max |
| Sulfur | 0.030 Max |
| Nitrogen | 0.10 Max |
The titanium stabilization in Alloy 321 Welded Fittings helps prevent carbide precipitation during welding and high-temperature service.
Mechanical Properties of ASTM A182 SS321 Pipe Fittings
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa Min |
| Yield Strength | 205 MPa Min |
| Elongation | 35% Min |
| Hardness | 95 HRB Max |
| Density | 8.0 g/cm³ |
| Melting Point | 1400 – 1450°C |
Stainless Steel 321 Pipe Fittings Dimensions Chart
90 Degree Elbow Dimensions
| NPS | Center to End A (mm) |
|---|---|
| ½” | 38 |
| ¾” | 38 |
| 1” | 38 |
| 1½” | 57 |
| 2” | 76 |
| 3” | 114 |
| 4” | 152 |
| 6” | 229 |
SS 321 Buttweld Fittings Weight Chart
| Size | SCH 40 Weight (Kg) |
|---|---|
| ½” Elbow | 0.10 |
| 1” Elbow | 0.25 |
| 2” Elbow | 0.75 |
| 3” Tee | 1.80 |
| 4” Reducer | 2.50 |
| 6” Pipe Cap | 5.20 |
Applications of Stainless Steel 321 Pipe Fittings?
Our Stainless Steel 321 Buttweld Pipe Fittings are used across various industrial sectors:
- Petrochemical Plants
- Chemical Processing Industries
- Refineries
- Oil & Gas Pipelines
- Heat Exchangers
- Pressure Vessels
- Food Processing Units
- Power Generation Plants
- Marine Applications
- Pharmaceutical Industries
- Aerospace Exhaust Systems
The high-temperature stability of ASTM A403 WP321 Buttweld Fittings makes them ideal for thermal processing equipment and furnace applications.
Manufacturing Process of Stainless Steel 321 Buttweld Fittings
The manufacturing of Stainless Steel 321 Pipe Fittings follows stringent quality control procedures to ensure dimensional accuracy and superior performance.
Manufacturing Steps- Raw Material Inspection
- Cutting & Forming
- Hot or Cold Forming
- Welding & Fabrication
- Heat Treatment
- Pickling & Passivation
- Dimensional Inspection
- Non-Destructive Testing
- Final Packaging & Dispatch
We manufacture ASTM A403 WP321 Buttweld Fittings using advanced machinery and international manufacturing standards.
Why Choose Our Stainless Steel 321 Buttweld Fittings?
Our business is to offer dependable plumbing solutions for crucial industrial applications. All of our fittings are made to stringent quality standards and are delivered with full material traceability and test certificates.
What We Offer- Wide Range of Sizes & Thicknesses
- Competitive Pricing
- Fast Delivery
- Custom Manufacturing
- International Quality Standards
- Third-Party Inspection Support
- Export Packaging
Our experience in manufacturing Stainless Steel 321 Buttweld Pipe Fittings helps industries achieve reliable and long-lasting piping performance.
Related Stainless Steel Fittings
- Stainless Steel 304 Buttweld Fittings
- Stainless Steel 316 Buttweld Fittings
- Stainless Steel 347 Pipe Fittings
- Stainless Steel 410 Pipe Fittings
- Stainless Steel 446 Buttweld Fittings
- Stainless Steel 347 Pipe Fittings
- Stainless Steel 347H Pipe Fittings
Frequently Asked Questions
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