Stainless Steel 321H Buttweld Fittings are high temperature resistant pipe fittings manufactured using stabilized austenitic stainless steel with Titanium. ASTM A403 WP321H Stainless Steel Buttweld Fittings are widely used in heat exchangers, refineries, pressure vessels, petrochemical plants and power generation industries because of its good resistance to intergranular corrosion and oxidation at elevated temperatures. Standard Products include Elbow, Tee, Reducer, Stub End and Pipe Bend in SS 321H material adhering to ASME B16.9 requirements.
Table of Contents
- ➤ What are ASTM A403 WP321H Stainless Steel Buttweld Fittings?
- ➤ Benefits of Stainless Steel 321H Pipe Fittings
- ➤ Types of SS 321H Buttweld Fittings We Manufacture
- ➤ Stainless Steel 321H Buttweld Fittings Specifications
- ➤ Chemical Composition of ASTM A403 WP321H Stainless Steel Buttweld Fittings
- ➤ Mechanical Properties of SS 321H Pipe Fittings
- ➤ SS 321H Elbow Dimensions Chart
- ➤ Stainless Steel 321H Pipe Bend Weight Chart
- ➤ Applications of SS 321H Buttweld Fittings
- ➤ Why Choose Us as Your Stainless Steel 321H Pipe Fittings Manufacturer?
321H Stainless Steel Butt Weld Fittings
We are well known Manufacturer, Supplier and Exporter of high quality Stainless Steel 321H Buttweld Fittings for vital industrial piping systems. These fittings are made from high grade raw materials and unique production techniques to guarantee dimensional accuracy, exceptional corrosion resistance and extended life.
We are involved in delivering a wide range of SS 321H Buttweld Fittings which are used in industries where high temperature and corrosive environment need exceptional performance. 321H stainless steel is titanium stabilized for greater stability against chromium carbide precipitation . These fittings are for long time service at high temperature.
We are a major manufacturer of SS 321H buttweld fittings and supply these fittings in different diameters, wall thickness and schedules as to international standards like ASTM A403 WP321H, ASME B16.9.
What are ASTM A403 WP321H Stainless Steel Buttweld Fittings?
ASTM A403 WP 321H Stainless Steel Buttweld Fittings are wrought austenitic stainless steel fittings intended for use in pressure pipe applications. Grade 321H is the higher carbon form of SS 321, offering superior creep resistance and higher strength at extreme temperatures.
Fittings are routinely welded to piping systems to change direction, to branch flow, to reduce pipe size or to terminate pipes. Their outstanding resistance to oxidation and stress corrosion cracking makes them suited for harsh industrial applications.
Benefits of Stainless Steel 321H Pipe Fittings
- Excellent High Temperature Strength – 321H stainless steel is specially developed for elevated temperature applications where creep resistance is required.
- Superior Corrosion Resistance – The titanium stabilization helps prevent intergranular corrosion after welding.
- Good Weldability – These fittings can be easily welded using standard fusion welding techniques.
- Oxidation Resistance – Suitable for intermittent service up to 870°C and continuous service up to 925°C.
- Long Service Life – The fittings maintain structural integrity under thermal cycling and pressure conditions.
Types of SS 321H Buttweld Fittings We Manufacture
We manufacture and supply a wide range of ASME B16.9 WP321H Butt Weld Fittings in seamless, welded, and fabricated forms.
Available Product Range- SS 321H Long Radius Elbow
- SS 321H Short Radius Elbow
- SS 321H Tee
- SS 321H Equal Tee
- SS 321H Unequal Tee
- SS 321H Concentric Reducer
- SS 321H Eccentric Reducer
- SS 321H Stub End
- SS 321H End Cap
- SS 321H Pipe Bend
- SS 321H Cross
- SS 321H Return Bend
As a leading SS 321H pipe fittings supplier, we also provide customized dimensions and special configurations according to project requirements.
Stainless Steel 321H Buttweld Fittings Specifications
| Specification | Details |
|---|---|
| Product Name | Stainless Steel 321H Buttweld Fittings |
| Material Grade | SS 321H / UNS S32109 |
| Standard | ASTM A403 WP321H |
| Dimensions | ASME B16.9, MSS SP-43, ASME B16.28 |
| Size Range | ½” NB to 48” NB |
| Thickness | SCH 5 to SCH XXS |
| Type | Seamless / Welded / Fabricated |
| End Connection | Butt Weld |
| Form | Elbow, Tee, Reducer, Cap, Stub End, Bend |
| Pressure Rating | SCH 10 to SCH 160 |
| Surface Finish | Pickled, Annealed, Polished, Sand Blasted |
| Origin | India |
Chemical Composition of ASTM A403 WP321H Stainless Steel Buttweld Fittings
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.04 – 0.10 |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Chromium (Cr) | 17.00 – 19.00 |
| Nickel (Ni) | 9.00 – 12.00 |
| Titanium (Ti) | 5 x (C+N) min to 0.70 max |
| Nitrogen (N) | 0.10 max |
Mechanical Properties of SS 321H Pipe Fittings
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa min |
| Yield Strength | 205 MPa Min |
| Elongation | 35% Min |
| Hardness | 95 HB Max |
SS 321H Elbow Dimensions Chart
| NPS | Outside Diameter (mm) | Center to End LR (mm) | Center to End SR (mm) |
|---|---|---|---|
| 1/2" | 21.3 | 38 | 25 |
| 3/4" | 26.7 | 38 | 25 |
| 1" | 33.4 | 38 | 25 |
| 1 1/2" | 48.3 | 57 | 38 |
| 2" | 60.3 | 76 | 51 |
| 3" | 88.9 | 114 | 76 |
| 4" | 114.3 | 152 | 102 |
| 6" | 168.3 | 229 | 152 |
Stainless Steel 321H Pipe Bend Weight Chart
| Size | SCH 40 Weight (Approx.) |
|---|---|
| 1" | 0.45 kg |
| 2" | 1.20 kg |
| 3" | 2.80 kg |
| 4" | 4.60 kg |
| 6" | 9.50 kg |
| 8" | 16.80 kg |
Applications of SS 321H Buttweld Fittings
Our Stainless Steel 321H fittings exporter services cater to a wide range of industries worldwide.
Industries We Serve- Petrochemical Plants
- Oil & Gas Industries
- Refineries
- Power Generation
- Fertilizer Plants
- Pharmaceutical Industries
- Heat Exchangers
- Pressure Vessel Manufacturing
- Chemical Processing Plants
- Food Processing Industries
Because of their excellent thermal stability, SS 321H Reducer / Pipe Bend manufacturer products are highly preferred for high-temperature process piping systems.
Testing & Quality Assurance
Our ASTM A403 WP 321H Stainless Steel Buttweld Fittings are tested according to international quality standards.
- PMI Testing
- Hydrostatic Testing
- Radiography Testing
- Ultrasonic Testing
- Intergranular Corrosion Testing
- Hardness Testing
- Flattening Test
- Dimensional Inspection
Why Choose Us as Your Stainless Steel 321H Pipe Fittings Manufacturer?
We focus on delivering reliable industrial piping solutions backed by strict quality standards and industry expertise.
Our Key Advantages- High-quality raw materials
- Precision manufacturing process
- Third-party inspection support
- Competitive pricing
- Fast delivery schedules
- Global export capability
- Customized fitting solutions
- Complete traceability and test certificates
Each fitting undergoes rigorous dimensional, chemical, and mechanical testing before dispatch to ensure international quality compliance.
Related Stainless Steel Fittings
We also supply:
- SS 309H Buttweld Fittings
- SS 310 Buttweld Fittings
- SS 310s Buttweld Fittings
- SS 316 Buttweld Fittings
- SS 410 Buttweld Fittings
- SS 446 Buttweld Fittings
- SS SMO 254 Buttweld Fittings
Frequently Asked Questions
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