Stainless Steel Weld-End Conical Unions
A stainless weld union is a taper-seat AISI 304 or 316 connection with both ends welded to stainless pipe, allowing the line to be dismantled by opening the nut.
It is used at pump, filter and equipment maintenance points in food, dairy and chemical lines. It is supplied in weld-end and spanner types from 1/2″ to 4″.
Main Applications
- Stainless pump connections
- Filter and strainer maintenance points
- Detachable joints in food and dairy lines
- Chemical dosing groups
- Heat exchanger and tank connections
- Separating equipment in CIP lines
Technical Data
| Fitting type | Weld union: two weld ends and a nut |
|---|---|
| Material | AISI 304; AISI 316 in selected sizes (product range) |
| Weld type | 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″, 3″, 4″ (product range) |
| Spanner type | 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″ (product range) |
| Seat | Taper, metal-to-metal (depending on model) |
| Connection | TIG welding; removal by the nut |
| Surface | Uncoated stainless |
| Working pressure | Depending on model |
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? A weld union gives a more compact removal point than a flange on welded stainless lines; the spanner type is practical where frequent removal is needed.
Advantages
Removal on Welded Lines
- Maintenance point without a flange
Spanner-Type Option
- Practical at frequently dismantled points
Gasket-Free Seat
- Taper metal-to-metal (depending on model)
Compact
- Less space than a flange
Construction and Design Features
- Body with two weld ends and a nut
- Hexagonal or spanner-slot nut
- Taper seat face (depending on model)
- Uncoated stainless
Send the union size, type, grade and quantity; we will confirm the suitable stainless weld union from stock.
How to Choose?
- Define the maintenance pointPlan a union before pumps, filters and equipment.
- Choose the typeUse the spanner type for frequent removal, hexagonal for general use.
- Match the gradeChoose the same material as the pipe.
- Take care when weldingProtect the nut and seat from welding heat.
Complementary Products
Why ORFA?
Other Welded Stainless Steel Fittings
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Stainless Steel Concentric Reducers
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Stainless Steel Butt Weld Elbows
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Stainless Steel Single-Side Threaded Nipples
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Details →Get a quote for your project
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