Pipe Fittings

Crane Fluid Systems offer a full range of pipe fittings in malleable iron, bronze or mild steel.

Malleable

Crane Fluid Systems offer a full range of malleable iron pipe fittings, available in sizes from 1/8" to 6" PN25 rated. Crane FS taper threads meet BS EN 10226-2 (ISO 7-1).

Malleable iron pipe fittings are available in black and galvanised finishes, the majority of fittings have the BSI Kitemark approval, are LPCB approved and are listed in the WRAS directory. Malleable iron fittings conforming to BS EN 10242 have UL approval.

Crane Fluid Systems malleable iron is of the Blackheart type ideally suited to pipe fitting and manufacture and conforms to BS EN 1562 Designation EN-GJMB-300-6, ASTM A197 and ISO 5922.

The close relationship between the physical properties of test bars and actual castings ensures design integrity and the preservation of high safety factors. Shock pressures within pipe systems can be tolerated with complete safety. The corrosion resistance of Crane malleable iron is good when compared with grey cast iron and mild steel for most general applications including water, gas and steam.

Bronze

Bronze pipe fittings are available in sizes from 1/8" to 6" PN25 rated. Crane FS taper threads meet BS EN 10226-2 (ISO 7-1). Crane bronze has very good resistance to corrosion by aggressive waters, steam and other fluids which promote dezincification in certain copper alloys. It is also suitable for a wide range of temperatures. Bronze fittings meet BS143 & 1256.

Mild Steel

BS EN 10242 and BS143 & 1256 allow small size (3/8 and smaller) straight fittings to be supplied in other ferrous materials e.g. mild steel as an alternative to malleable cast iron, providing the mechanical properties are at least equivalent to the specified grade of malleable iron.

Galvanising

Where additional resistance to corrosion is required, malleable cast iron fittings can be hot-dip zinc coated (galvanised) prior to machining. This process involves coating the fittings with zinc which, in addition to its natural resistance to corrosion, provides electro-chemical protection where the iron of the fitting is exposed by damage. Mild steel fittings can be supplied with a proprietary zinc based coating. The thickness of the zinc coating on Crane galvanised fittings conforms to the requirements of BS EN 10242 1994 and BS143 & 1256 200 - the surface related mass of the zinc coating shall not be less than 500 g/m2 as an average of 5 fittings. This corresponds to a thickness of 70µ. Average coatings are well in excess of this and exceed the standard requirements. When ordering galvanised or zinc coated fittings add the suffix 'G' to the figure number.

Press/Temperature Ratings

BS EN 10242 1994 and BS 143 & 1256 : 2000 states that fittings are for general purposes for the transmission of fluids within the pressure and temperature ranges specified. The ratings given are uprated from those in the 1968 edition, both for malleable cast iron and bronze fittings. The graph below shows the BS pressure temperature ratings. Crane malleable iron and bronze fittings are suitable for use at these new ratings with the exception of certain unions (see note below), but such use is dependent on the suitability of the connecting pipe material, the threaded joint and any thread sealants used. Due consideration should also be given to any applicable codes of practice. Pressures stated are maximum non-shock gauge.

Testing

Production testing: Meets requirements of BS EN 10242 or BS 143 & 1256 as applicable. Type testing: In addition to production testing, all pressure containing fittings are required by BS EN 10242, BS 143 & 1256 and ISO 49 to be designed to withstand specified design test pressures and to be type tested accordingly - 100 bar (1450 lbf/in2) for sizes 4 and smaller malleable iron fittings, 64 bar (928 lbf/in2) for sizes 5 and 6 malleable iron and all sizes bronze fittings. Tests carried out show that production fittings have safety margins well in excess of the BS requirement.

Finish

All malleable iron fittings are given an oil finish as protection against rust while in stock or during transit and after installation prior to plant commissioning. Finished fittings are free of any polycyclic aromatic hydrocarbons.

Marking

All Crane fittings are marked with the C logo and where size permits, the fitting size and Kitemark symbol. In addition, some castings also display a pattern identification number. This is normally located next to the band of the fitting. This number is used during the manufacturing process as part of the rigorous quality control procedures to ensure consistent high quality castings. The number is not of relevance to the end user of the product.

When you see these signs - you're safe

Suitable for Use with Drinking Water

The British Standards Kitemark means that the fittings have been independently assessed by BSI to confirm compliance with the product standards - BSEN 10242 and BS143 & 1256.

Crane kitemarked fittings are deemed to satisfy the requirements of the United Kingdom Water Regulations (Byelaws).

Crane malleable iron fittings also have the approval of the Loss Prevention Certification Board for use in sprinkler systems.

Pipe Fittings

This sign means that the pipe fitting is manufactured to Crane standards.