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1987 Edition, 1987

Complete Document

90/10 Copper Nickel Alloy Piping for Offshore Applications - Specification: Fittings

Includes all amendments and changes through Change/Amendment , 1987

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Superseded By: EEMUA PUB NO 234

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The Publications in this series of specifications for 90/10 copper nickel tubes, flanges and fittings are as follows:

Publication No. 144 Tubes - Seamless and Welded

Publication No. 145 Flanges - Composite and Solid

Publication No. 146 Fittings

Material selected from the series of specifications contained in EEMUA Publications Nos. 144, 145 and 146 provide for the total requirements of 90/10 copper nickel piping systems intended to operate at pressures up to 16 bar at 75°C or 20 bar at 38°C.

This publication comprises a series of sections for pipe fittings suitable for use with 90/10 Cu Ni tube. The sections are as follows:-

Section one 90/10 Cu Ni butt welding fittings.

Section two 90/10 Cu Ni socket welding fittings (including unions)

Section three copper alloy capillary brazing fittings (including unions)

Section four copper alloy flareless, non manipulative type compression fittings

Section five copper alloy threaded fittings

Section six 90/10 Cu Ni reinforced branch connectors

Section seven 90/10 Cu Ni saddle pieces

Fittings other than butt weld tube may be suitable for design pressures and temperatures higher than those required by this specification. Where this is required the manufacturer of such fittings should be consulted.

In order that a more satisfactory match than hitherto is obtained between the bores of fittings (and other butt welding components) and the bores of tubes to which they would be butt welded, a greater emphasis has been placed on the bore dimensions and tolerances of the fittings. The mean bore dimensions of butt weld fittings (See section one of this publication) correspond to the mean bore dimensions of the corresponding 16 or 20 bar rated tubes covered by EEMUA Publication 144: 1987: Tubes - seamless and welded.

The "building in" dimensions of butt-welding fittings, apart from end caps, have been based on ANSI B16.9. End caps have been based on DIN 28011 (with suitable amendments) since the majority of manufacturers tend to follow this particular specification.

Additional compensatory thicknesses have been applied to the intrados of long radius (butt welded) elbows and to the end caps, (see section one of this publication).

Socket weld type fittings are included as an alternative to capillary brazed fittings or flareless, non manipulative fittings.

Threaded fittings including caps, plugs and bushings have also been included in this publication.

Materials of manufacture for each type of fitting are covered in the relevant sections within this publication. Where other copper base or non ferrous materials are covered in the various sections, the purchaser may select accordingly. All materials covered are compatible with the 90/10 Cu Ni alloy. However, reference should also be made to BS MA 18 for design limitations.

The basic dimensions, based on ANSI B16.11, together with the acceptance criteria are included with additional test requirements for union type fittings. With reference to capillary brazed fittings, appropriate tests to establish that sufficient brazing alloy has been included as an integral part of the fitting design are outlined, together with the extra test requirements for the acceptance of union type fittings.

A list of other standards and codes referred to in this publication is given in Appendix A.