EEMUA PUB NO 234
90/10 Copper nickel alloy piping for offshore applications Specification
|Publication Date:||1 November 2015|
The following EEMUA Publication 234 incorporates in this Specification the previous Edition of EEMUA 144/145/146: 90/10 copper nickel tubes, flanges and fittings. Details are as follows, with the Chapters relating to the previous Edition included in brackets:
Publication No. 144 Tubes:
Seamless and welded (Chapters 1 and 2) Publication No. 145
Flanges: Composite and solid (Chapters 3 to 6)
Publication No. 146 Fittings (Chapters 7 to 13)
The specified outside diameters of tubes, in sizes up to and including 450 mm, covered by this Specification have been selected from BS EN 12449:2012 "Copper and copper alloys - Seamless Round Tubes for General Purposes": Table 16(1).
The specified outside diameters of the remaining sizes covered by this Specification have been selected from BS MA 60 "Summary and application of copper and copper alloy tubes for ships' pipework systems [now withdrawn](2)."
The wall thicknesses have been selected to cover the specific requirements of the petroleum industries. This Specification specifies the requirements for seamless and seam-welded tubes for offshore and associated piping installations based on ASME B31.3-2014(3).
The titles of other Publications referred to in this Publication are listed in the References.
Note: The reference to "tube" rather than "pipe" in this Specification is based on the usage of this word in existing copper and copper alloy standards.
This part of the Specification is for a series of composite (lap type) and solid flanges in metric dimensions based on ASME B16.5-2013(4), MSS SP-44-2006(5) and BS EN 1759-1:2004(6).
The basic metric dimensions for drilling and flange outside diameters are those given in ASME B16.5-2013, BS EN 1759-1:2004 and MSS SP-44-2006 for Class 150 rating with inch size bolting.
The flanges covered in this Specification are suitable for maximum design pressures of 16 bar at 75°C and 20 bar at 38°C.
For sizes of a particular type of flange not covered within this Specification the Purchaser should satisfy himself that the flange is suitable for the service intended.
The diameters of hubs have been chosen to permit the use of ring spanners. A list of other standards and codes referred to in this Publication is given in the References.
Material selected from the series of Specifications contained in EEMUA Publication 234 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 part of the Publication comprises seven Chapters for pipe fittings suitable for use with 90/10 Cu Ni tube. The Chapters are as follows:
90/10 Cu Ni butt welding fittings.
90/10 Cu Ni socket welding fittings (including unions).
Copper alloy capillary brazing fittings (including unions).
Copper alloy flareless, non-manipulative type compression fittings.
Copper alloy threaded fittings.
90/10 Cu Ni reinforced branch connectors.
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 Chapter seven of this Publication) correspond to the mean bore dimensions of the corresponding 16 or 20 bar rated tubes covered by the tube Chapters of this Publication.
The "building in" dimensions of butt-welding fittings, apart from end caps, have been based on ASME B16.9:2012(7). End caps have been based on DIN 28011:2012-06(8) (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 18:1973(9) for design limitations.
The basic dimensions, based on ASME B16.11-2011(10), 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.