Welded Stainless Steel Fittings
Stainless butt-weld fittings are AISI 304 and AISI 316 connection parts such as elbows, tees, reducers, caps, weld unions and flanges welded to stainless pipelines with TIG or stainless electrodes.
They are used in process lines in food and beverage, dairy, pharmaceutical, chemical, treatment and marine environments. Elbows are supplied from 21.3 mm to 355 mm, reducers up to 20″ × 16″ and flanges from DN15 to DN450.
Main Applications
- Food, dairy and beverage process lines
- CIP cleaning lines
- Pharmaceutical and cosmetics plants
- Chemical and treatment plants
- Seawater and saline environment lines
- Hot domestic water and condensate lines
- Stainless tank and reactor connections
Technical Data
| Fitting types | Butt-weld elbow, tee, reducing tee, cross, concentric and eccentric reducer, cap, weld union, single-end nipple, flange |
|---|---|
| Material | AISI 304; AISI 316 on selected parts (product range) |
| Elbows | 90°, 21.3 – 219.1 mm; 154 mm and 355 mm options (product range) |
| Reducers | Concentric 1″ × 3/4″ – 20″ × 16″; eccentric in selected sizes (product range) |
| Tees and caps | Tees 1/2″ – 8″, caps 1/2″ – 10″ (product range) |
| Weld unions | Weld type and spanner type, 1/2″ – 4″ (product range) |
| Single-end nipples | 1/8″ – 4″ (product range) |
| Flanges | Plate, blind, weld neck, slip-on; DN15 – DN450, mostly PN16 (product range) |
| Connection | TIG welding or stainless electrode; bolted on flanges |
| Surface | Uncoated stainless |
| Wall thickness | Depending on model |
| Working pressure | Depending on wall thickness, material and flange class |
Material Options
| Part | AISI 304 stainless | AISI 316 stainless | Carbon steel |
|---|---|---|---|
| Body | AISI 304 stainless steel | AISI 316 stainless steel (selected sizes) | Carbon steel, grade depending on model |
| Surface | Uncoated stainless | Uncoated stainless | Black or oiled |
| Wall thickness | Depending on model | Depending on model | Standard, SCH40, SCH80 |
| Welding | TIG / stainless electrode | TIG / stainless electrode | Stick or TIG/MIG |
| Suitable media | Food, drinking water, mild chemicals | Chloride-containing water, seawater, aggressive chemicals | Heating water, steam, fire water |
Which material? AISI 304 should be chosen for food, drinking water and general process lines, AISI 316 for chloride-containing water, marine environments and aggressive chemicals; welding uses filler wire of the same grade as the pipe.
Advantages
Hygienic Lines
- Uncoated stainless surface is cleanable
Corrosion Resistant
- The material itself resists corrosion
Two Grades
- 304 for general use, 316 for aggressive media
Wide Product Family
- All butt-weld parts from elbows to flanges
Detachable Option
- Maintenance points with weld unions and flanges
Construction and Design Features
- Square-cut ends suited to TIG welding
- Elbows with the same outside diameter as the pipe
- Size transitions with concentric and eccentric reducers
- Spanner-type and hexagonal weld union types
- Flanges mostly with PN16 bolt pattern
Send the pipe outside diameter, material grade (304 / 316), fitting type and DN/PN class for flanges; we will confirm suitable stainless parts from stock.
How to Choose?
- Choose the materialDecide on AISI 304 or AISI 316 for the medium.
- Determine the pipe sizeMeasure the stainless pipe outside diameter and wall thickness.
- Plan removable pointsFit weld unions or flanges at maintenance points.
- Choose the welding methodSelect TIG welding and suitable filler wire for the grade.
Complementary Products
Why ORFA?
Types of Welded Stainless Steel Fittings
Stainless Steel Eccentric Reducers
Stainless steel eccentric reducers change pipe size on welded stainless lines while keeping one side flat.
Details →
Stainless Steel Flanges
Stainless steel flanges connect stainless steel pipelines to valves and equipment with bolted, removable joints.
Details →
Stainless Steel Butt Weld Reducing Tees
Stainless steel butt weld reducing tees are used to take a smaller branch off the main run on stainless steel lines.
Details →
Stainless Steel Butt Weld Caps
Stainless steel butt weld caps are used to close the end of a stainless steel pipe by welding.
Details →
Stainless Steel Weld-End Conical Unions
Stainless steel weld-end conical unions create a tight, removable joint on welded stainless steel lines.
Details →
Stainless Steel Butt Weld Crosses
Stainless steel butt weld crosses split flow in four directions on welded stainless steel lines.
Details →
Stainless Steel Butt Weld Tees
Stainless steel butt weld tees split flow in three directions on welded stainless steel lines.
Details →
Stainless Steel Concentric Reducers
Stainless steel concentric reducers change pipe size on welded stainless lines along the same centre line.
Details →
Stainless Steel Butt Weld Elbows
Stainless steel butt weld elbows are fittings used to change direction on welded stainless steel lines.
Details →
Stainless Steel Single-Side Threaded Nipples
Stainless steel single-side threaded nipples are transition pieces with one threaded end and one plain end for welding.
Details →Other Weld Fittings
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