Stainless steel 90° elbow, female/female 316, BSP threaded
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Shipping and Delivery
| Product Type | Delivery Method | Preparation Time | Transport Time | Delivery Time |
|---|---|---|---|---|
| All Parts | Pickup Point | 0 to 3 days | 3 to 6 days | 3 to 9 days |
| All Parts | Home Delivery | 0 to 3 days | 3 to 5 days | 3 to 8 days |
| Tubes > 90cm | Home Delivery | 0 to 3 days | 3 to 5 days | 3 to 8 days |
| Tubes < 200cm | Home Delivery | 0 to 3 days | 3 to 5 days | 3 to 8 days |
| Tubes > 200cm | Home Delivery | 0 to 6 days | 6 to 10 days | 6 to 16 days |
| Assembled Products | Home Delivery & Pickup Point | 0 to 5 days | (see methods) | 3 to 11 days |
* Tubes longer than 90cm cannot be delivered to a pickup point
For orders of more than 50 units of the same item or more than 100 kg, restocking may exceptionally extend the delivery time by up to 10 working days.
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Stainless steel 90° elbow, female/female 316, BSP threaded
Stainless steel 90° elbow, female/female 316, tapped BSP (Rp to ISO 7-1) at both ends, from 1/4" to 4" (DN8 to DN100). It makes a right-angle change of direction on threaded pipework. PN 20 up to 40 °C, drinking water compliant, for all fluids compatible with stainless steel.
Description of the stainless steel 90 degree BSP elbow
This threaded stainless steel pipe fitting connects two components with R male threads at 90°. It is investment cast (lost wax) in CF8M (AISI 316) stainless steel, and designed, manufactured and inspected to ISO 4144.
Both ends have a parallel Rp tapped thread, which fits onto a taper R male thread with no welding or soldering. The elbow comes in 11 sizes, from 1/4" (French size 8x13) to 4" (102x114). The 1/2" corresponds to French size 15x21, i.e. DN15. The body has no flats: each end finishes in a band. Dimensions and weights are given below.
Stainless steel 90° elbow: technical specifications
| Material | CF8M (AISI 316) stainless steel |
| Manufacture | Investment casting (lost wax) |
| Standard | Designed, manufactured and inspected to ISO 4144 |
| Thread | Rp tapped (parallel) to ISO 7-1 (BSP, R series). Mates with an R male thread (taper). Not compatible with NPT |
| Connection | Female/female |
| Angle | 90° |
| Nominal pressure | PN 20: 20 bar from −20 to 40 °C, lower above that |
| Temperature | −20/+220 °C, permissible pressure reduced above 40 °C |
| Fluids | All fluids compatible with stainless steel |
| Sizes | 11 sizes, from 1/4" to 4" |
| Compliance | 4MS; drinking water: French order of 25 June 2020 |
Pressure and temperature
PN 20 applies from −20 to 40 °C. Above that, the permissible pressure falls. Values marked ≈ are read from the pressure/temperature curve in the technical data sheet.
| Temperature (°C) | Max. pressure (bar) |
|---|---|
| −20 → 40 | 20 |
| 100 | ≈ 16.5 |
| 150 | ≈ 15 |
| 220 | ≈ 13.5 |
Certification and compliance
According to the technical data sheet for the series:
- 4MS: compliant with the 4MS requirements, the harmonized European rules for materials and products in contact with drinking water.
- Drinking water: compliant with the French order (arrêté) of 25 June 2020 on metallic materials and products in contact with water intended for human consumption.
Uses and installation advice
This stainless steel 90° elbow is used on drinking water systems and on circuits carrying fluids compatible with 316 stainless steel. Check fluid compatibility and the permissible pressure at the working temperature.
- Thread sealing: an Rp/R joint seals on the threads, using PTFE or jointing compound suited to the fluid and the working temperature.
- Galling: with stainless steel on stainless steel, the thread can gall. Screw in gradually, without forcing.
- Tightening: tighten with an open-ended or adjustable spanner on the flats of the male component (a strap wrench on pipe), not with pipe grips or pliers, which mark stainless steel. As the elbow has no flats, hold it with a strap wrench.
- Dissimilar metals: on a water system, stainless steel forms a galvanic couple with galvanized steel or cast iron. Allow for this when choosing the connected components.
Technical drawing
Dimensions (mm)
Dimensions in millimetres, PN in bar, weight in kilograms. Dimensions for the 3" are not currently available: contact us if you need them. ØA and ØB are the outside diameters of the body and the band. Depending on the size, the band value may appear in either column: for overall dimensions, use the larger of the two.
| Rp size | French size | ØA | ØB | L1 | L2 | T | PN (bar) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 1/4" | 8x13 | 17.5 | 16 | 19 | 6.5 | 2.5 | 20 | 0.026 |
| 3/8" | 12x17 | 21 | 19.5 | 23 | 6.5 | 2.5 | 20 | 0.044 |
| 1/2" | 15x21 | 27 | 25 | 27 | 6.5 | 1.8 | 20 | 0.074 |
| 3/4" | 20x27 | 30.5 | 32.5 | 32.5 | 6.5 | 2.2 | 20 | 0.107 |
| 1" | 26x34 | 37.5 | 38.5 | 38 | 8 | 2.7 | 20 | 0.174 |
| 1"1/4 | 33x42 | 49.5 | 47.5 | 45 | 10 | 2.7 | 20 | 0.282 |
| 1"1/2 | 40x49 | 56 | 54 | 48 | 11.5 | 3.2 | 20 | 0.401 |
| 2" | 50x60 | 67 | 65.5 | 57 | 11 | 3 | 20 | 0.517 |
| 2"1/2 | 66x76 | 85 | 82 | 69 | 13.5 | 3.2 | 20 | 0.909 |
| 3" | 80x90 | – | – | – | – | – | 20 | 1.366 |
| 4" | 102x114 | 125.5 | 122.5 | 101 | 16.5 | 4 | 20 | 2.448 |
Size conversion
Conversion between the French size designation, inches, DN and the outside diameter stated in the designation (a rounded value, not a pipe dimension).
| French size | 8x13 | 12x17 | 15x21 | 20x27 | 26x34 | 33x42 | 40x49 | 50x60 | 66x76 | 80x90 | 102x114 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Inches | 1/4" | 3/8" | 1/2" | 3/4" | 1" | 1"1/4 | 1"1/2 | 2" | 2"1/2 | 3" | 4" |
| DN | DN8 | DN10 | DN15 | DN20 | DN25 | DN32 | DN40 | DN50 | DN65 | DN80 | DN100 |
| OD (French size) | 13 mm | 17 mm | 21 mm | 27 mm | 34 mm | 42 mm | 49 mm | 60 mm | 76 mm | 90 mm | 114 mm |
Stainless steel elbow: frequently asked questions
What is the pressure rating at 100 °C?
≈ 16.5 bar, against 20 bar from −20 to 40 °C.
BSP or NPT thread?
BSP to ISO 7-1: Rp parallel tapped thread, for use with an R taper male thread. This elbow is not compatible with NPT.
316 or 304 stainless steel?
This elbow is 316 (CF8M). Unlike 304, 316 contains molybdenum and has better resistance to chlorides.
Can this elbow be used with brass or malleable iron fittings?
The threads must match: the mating component must have an R taper male thread to ISO 7-1. Note that, with few exceptions, our flat-seal and conical-seat brass fittings are threaded to ISO 228-1 (BSPP, parallel), not R male. With malleable iron, allow for the galvanic couple on a water system.
The appearance of the part may vary depending on the batch in stock. Contact us for confirmation.
See also
Full range: all stainless steel BSP fittings
Other stainless steel fittings: stainless steel female/female coupling, stainless steel union PN 20, stainless steel union PN 40.
Other materials: all elbows, brass elbows, black malleable iron elbows.
Useful guides:
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