Black Crosses
A black cross is a malleable cast iron fitting with four female-threaded ends that splits flow in four directions or joins four pipes at a single point on a threaded black steel line. Using one body instead of two tees shortens the connection.
It is used in boiler room distributors, sprinkler and gas distribution nodes, and lines that need measuring and drain points. The store stocks 8 sizes from 1/2″ to 3″.
Main Applications
- Heating distributor and manifold nodes
- Taking two opposite branches from the main line
- Combined measuring, drain and air vent points
- Compressed air distribution nodes
- Gas distribution nodes (in projects compliant with regulations)
- Test and trial rigs
Technical Data
| Fitting type | Equal cross, all four ends the same size |
|---|---|
| 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 all four ends |
| Sizes | 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″, 2 1/2″, 3″ (product range) |
| 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) |
| Unused end | Closed with a black plug |
| Three-way alternative | With a black tee |
| 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 | Investment casting 1.4408 (AISI 316 equivalent), depending on model |
| Surface | Black, uncoated | Zinc coated | Stainless, uncoated |
| 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 | Corrosive media and media requiring hygiene |
Which material? In a closed heating distributor a black cross matches the pipe and other black fittings; a galvanized cross should be chosen for sprinkler and domestic water lines.
Advantages
Four Connections in One Body
- A single piece instead of two tees and a nipple
- Fewer sealing points and shorter length
Flexible Use
- A spare end can be plugged and reserved for a future branch
Symmetrical Distribution
- Opposite branches leave from the same axis
Heat Resistance
- Rated 20 bar at +300 °C
Construction and Design Features
- Four ends on two perpendicular axes, same size and same Rp thread
- Common flow chamber at the centre
- One-piece cast body
- TS EN 10242 design A
Send the cross size and quantity; we will also prepare plugs for the ends that will not be used.
How to Choose?
- Determine the number of endsUse a cross if four connections are needed and a tee for three.
- Measure the sizeAll four ends are the same size; add reducing bushes for branches of a different size.
- Plan spare endsClose ends reserved for future use with plugs.
- Check pressure and temperatureCompare operating values with the EN 10242 limits.
Complementary Products
Why ORFA?
Other Threaded Black Fittings
Threaded Black Tees
Threaded black tees are equal-size fittings used to split flow in three directions on threaded black steel pipelines.
Details →
Black 45° Elbows
Black 45° elbows are fittings used to change direction by 45 degrees on threaded black steel pipelines.
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Black Pipe Crossover Bends
Black pipe crossover bends are curved fittings used to pass over another pipe on threaded black steel lines.
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Black Unions
Black unions are fittings that join two threaded black steel pipes in a way that can be taken apart again.
Details →
Black Elbows
Black elbows are fittings used to change direction by 90 degrees on threaded black steel pipelines.
Details →
Black Reducing Tees
Black reducing tees are fittings used to take a smaller branch off the main run on threaded black steel lines.
Details →
Black Conical Unions
Black conical unions provide a tight, removable connection on threaded black steel pipes through a conical seat.
Details →
Black Plugs and Caps
Black plugs and caps are used to close the ends of threaded black steel pipes and fittings.
Details →
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.
Details →
Black Reducing Sockets
Black reducing sockets are female threaded fittings that join two black steel pipes of different sizes.
Details →
Black Sockets
Black sockets are female threaded fittings that join two black steel pipes of the same size in a straight line.
Details →
Black Nipples
Black nipples are short black steel pieces with male threads on both ends, used to connect two female threaded fittings.
Details →
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
Our sales team will prepare the best solution for your needs.