Black Pipe Crossover Bends
A black pipe crossover is a curved malleable cast iron fitting with two female-threaded ends that lets a threaded black steel line pass over another pipe crossing in the same plane. It replaces a crossing built with four elbows with a single piece.
It is used where heating flow and return lines cross, in surface-mounted installations and in narrow shafts. Sizes and stock vary by model.
Main Applications
- Crossing points of heating flow and return lines
- Passing over pipes in surface-mounted installations
- Crossing lines at radiator connections
- Pipe crossings in narrow shafts and recesses
- Crossing points in compressed air lines
- Passing over another line in gas installations (in projects compliant with regulations)
Technical Data
| Fitting type | Crossover (curved bridge) |
|---|---|
| Product standard | TS EN 10242, design symbol A (manufacturer information) |
| Material | Blackheart malleable cast iron B 350-10 (sales sheet information) |
| Surface | Black, without galvanized coating |
| Thread | ISO 7-1 Rp parallel female thread on both ends |
| Sizes | Depending on model, please ask |
| Permissible pressure | 25 bar, −20 … +120 °C (EN 10242, design A) |
| Pressure at high temperature | 20 bar, up to +300 °C (EN 10242, design A) |
| Leak test | At least 5 bar air or 20 bar water (sales sheet information) |
| End axis | Both ends on the same axis; curved middle section |
| Alternative | Crossing with four elbows and nipples |
| Installation | Thread sealing tape, hemp or anaerobic sealant |
Material Options
| Part | Black malleable iron | Galvanized malleable iron | Stainless steel casting |
|---|---|---|---|
| Body | Blackheart malleable cast iron B 350-10 | Malleable iron EN-GJMB-350-10, hot-dip galvanized | Depending on model |
| Surface | Black, uncoated | Zinc coated | Depending on model |
| Thread | ISO 7-1 Rp female thread | ISO 7-1 Rp female thread | Depending on model |
| Pressure rating | 25 bar −20…120 °C, 20 bar 300 °C (EN 10242) | 25 bar −20…120 °C (EN 10242) | Depending on model |
| Suitable media | Closed heating water, gas, compressed air | Drinking and domestic water, fire water | Depending on model |
Which material? Where heating lines cross, a black crossover has the same surface as the pipe; a galvanized crossover is preferred in domestic water installations.
Advantages
One Piece Instead of Four Elbows
- Fewer threaded joints and sealing points
Neat Appearance
- Tidy crossings in surface-mounted installations
Fast Installation
- The crossing point is solved with a single piece
Heat Resistance
- Rated 20 bar at +300 °C
Construction and Design Features
- Both ends on the same axis with a curved bridge in the middle
- Rp female-threaded ends
- One-piece cast body
- TS EN 10242 design A
Send the pipe size and the outside diameter of the pipe to be crossed; we will confirm a suitable crossover and its stock.
How to Choose?
- Identify the crossing pointDecide which of two lines crossing in the same plane will pass over.
- Measure the pipe sizeDetermine the pipe size of the crossing line in inches.
- Check the crossed pipeMake sure the bend height suits the outside diameter of the pipe underneath.
- Check pressure and temperatureMatch the flow temperature and pressure of the crossing line with the limits of the standard.
Complementary Products
Why ORFA?
Other Threaded Black Fittings
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Black Elbows
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Black Reducing Tees
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Black Conical Unions
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Black Plugs and Caps
Black plugs and caps are used to close the ends of threaded black steel pipes and fittings.
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Black Crosses
Black crosses are fittings that split flow in four directions on threaded black steel pipelines.
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Black Street Elbows
Black street elbows have one female and one male threaded end and change direction on black steel lines without an extra nipple.
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Black Reducing Sockets
Black reducing sockets are female threaded fittings that join two black steel pipes of different sizes.
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Black Sockets
Black sockets are female threaded fittings that join two black steel pipes of the same size in a straight line.
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Black Nipples
Black nipples are short black steel pieces with male threads on both ends, used to connect two female threaded fittings.
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Black Reducing Bushes
Black reducing bushes are fittings with male and female threads used to change pipe size on threaded black steel lines.
Details →Get a quote for your project
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