EEMUA 145 Flanges

Shihang ,copper nickel pipe flanges manufacturer and supplier , also produce copper nickel eemua 145 composite weld neck flanges , as one of the world class copper nickel pipe line 

EEMUA 145 Flanges Dimension- Composite Weld Neck Flanges

There are two parts to form composite weld neck flanges.

• Copper Nickel Weld Neck Stub Ends ( Type S and Type L )
• Carbon Steel Backing Flanges

Please kindly check EEMUA 145 Flanges Dimension – Composite Weld Neck Flanges as below.

EEMUA 145 Copper Nickel Stub End -16 bar

EEMUA 145 Copper Nickel Stub End -20 bar

EEMUA 145 Flanges Dimension – Carbon Steel Backing Flanges

EEMUA 145 Flanges Chemical Composition

EEMUA 145 Flanges – Composite Weld Neck Flanges Tolerance

Tolerance of Copper Nickel Stub End

Tolerance of Carbon Steel Backing Flanges

3.1 Scope and Design Basis

Section 3.4 gives details of the 90/10 copper nickel weld neck stub ends, whereas Section 3.5 gives details of the forged carbon steel plate-type backing flanges.

The range of sizes covered for these composite weld-neck flanges are ½ in/16 mm – 36 in/914 mm*4 , normally ,the size is from dn 15 to dn 500 on shipment.

Two types of copper nickel stub ends are included in Section 3.4.

The short components (type S) are based on DIN 86037 but modified to suit the appropriate tube wall dimensions.

The long components (type L) are based on MSS SP-43:2013(24) to suit the appropriate tube wall dimensions. The long stub ends have been included to facilitate the attachment of this type of flange to butt welding elbows, tees, and the small end of reducers.

Only one type of backing flange is included in Section 3.5. The same backing flange is required for all weld neck stub ends whether they be long or short, 16 bar or 20 bar. This type of backing flange is not suitable for use with composite slip-on stub ends.

The thicknesses of the plate type backing flanges have been determined to meet the requirements of the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, Appendix 2, except that design stresses have been established in accordance with ASME B31.3-2014 criteria.

The following design criteria have been used:

(a) Drilling and outside diameter dimensions of flange sizes ½ inch/16 mm – 24 in/610 mm are in accordance with ASME B16.5-2013 and BS EN 1759-1:2004,

whereas the larger sizes, 28 in/711 mm – 36 in/914 mm are in accordance with MSS SP-44-2006.

(b) All calculations for backing flanges have been carried out using a design pressure of 20 bar at 38°C.

(c) Carbon Steel Backing flanges: ASTM A105-14(25) forged carbon steel. (d) Gaskets: 1.5 mm thick. (e) Bolting: ASTM A193-B7(26).

Design stresses used in the calculations were as follows:

• Steel backing flanges: 160.7 N/mm2.
• B7 bolting: 172.4 N/mm2.

Based on the results of the above calculations an attempt has been made to rationalize ½ in/16 mm up to and including 1½ in/44.5 mm backing flanges which utilize the same bolting. The opportunity was taken therefore to use the same flange thickness (dimension ‘b’) determined for the largest of this size range and apply it to the smaller sizes, resulting in identical bolt lengths for all flanges in that range. This was considered to be a practical and economical advantage within the industry.

The dimensions of backing flanges are governed by the strength required to resist the bolting forces which may occur on bolting up. Therefore all backing flanges are suitable for a maximum working pressure of 20 bars at 38°C.

This Specification does not specify hydraulic test pressures for flanges or components, details of which should be obtained from the appropriate application standards.

 3.2 Pressure/Temperature Ratings

Pressure/temperature ratings are the maximum allowable working pressures (MAWP) at the temperatures shown in Appendix B. If a stub end rated at 16 bar is required to be connected to a stub end rated at 20 bar then that flanged joint shall be rated at 16 bar (see Tables 12 and 13).

The temperature shown for a corresponding pressure rating is considered to be the same as that of the contained fluid.

3.3 EEMUA 145 Flanges Materials

3.3.1 Flanges

Stub ends detailed in Section 3.4 shall be manufactured in 90/10 Cu Ni alloy UNS 7060X,the composition and mechanical properties of which are specified in Table 17. Backing flanges detailed in Section 3.4 shall be manufactured from the material specified in Table 18. Alternative steels may be used for the backing flanges provided that they have mechanical properties equal to or better than those specified in ASTM A105-14 (normalized) and are acceptable to the Purchaser.

3.3.2 Gaskets

The gaskets shall not be graphited. Alternatively neoprene type gaskets with a minimum Shore hardness of not less than 75 may be used located within the bolt circle.

Note: Gaskets should not be used when mating with elastomer/rubber faced flanges.

3.3.3 Bolting (Stud Bolts)

Bolting for flanges to this Specification shall be selected from ASTM A193-B7 and ASTM A194-2H(27) and should be suitably protected from corrosion.

3.4 Weld Neck Stub Ends

3.4.1 Manufacture

Stub ends shall be manufactured by one or more of the following processes:

(a) Hot forging.

(b) Cold forging followed by annealing.

(c) Friction welded from wrought material in accordance with the requirements of BS EN ISO 15620:2000(28).

(d) Other methods of manufacture shall be as agreed between the Purchaser and the manufacturer.

3.4.2 Information To Be Supplied By The Purchaser

The following shall be specified by the Purchaser on the order (for stub ends).

(a) The title and number of this Specification (EEMUA Publication 234 Section 3.4). (a) Size: inches and millimetres.

(b) The pressure rating: 16 bar or 20 bar.

(c) Whether type “S” or type “L” stub ends are required.

(d) Whether certificates of compliance or manufacturer’s certificates are required (see Section 3.4.8).

(e) Whether it is his intention to inspect the material at the supplier’s works.

(f) Whether the individual cast analyses are required to be supplied (see Chapter 14). See Section 3.5.2 for information to be supplied by the Purchaser for backing flanges.

(g) Whether any additional identification marking other than that specified herein is required.

*5Alloy UNS 7060X is a modified form of the following national designated alloys UNS 70600, BS CW 352N and DIN 2.0872.

3.4.3 Freedom From Defects

The stub ends shall be visibly clean, smooth and free from defects greater than 0.5 mm in depth, irregularities, scale or deposits. 

3.4.4 Joint Facings And Surface Finish

All stub end jointing surfaces shall be machine finished and when compared by visual or tactile means with reference specimens, they shall comply with the values shown in Table 11.

It is not intended that instrument measurements be taken on the faces themselves and the Ra and R2 values relate to the reference specimens.

Table 11 Surface Finish (Weld Neck Stub Ends) 

Note: The term “turning” includes any method of machining producing concentric or spiral grooves. * Ra and Rz are defined in BS 1134:2010

3.4.5 Selection Of Test Samples

For stub ends produced by hot forging or cold forging followed by annealing, samples for determination of mechanical properties shall be selected in accordance with Table 20 of BS EN 12420:2014(30). The mechanical properties so determined shall comply with the requirements of Table 17 of this Publication.

Samples shall be selected from each cast for chemical analysis and shall comply with the requirements of Table 17 of this section.

For stub ends produced by friction welding using seamless tube and hot rolled or cold rolled and annealed sheet or plate, samples shall be selected as follows:

• Seamless tube in accordance with Section 1.6 of this Publication. The mechanical properties of the finished components shall comply with the requirements of Table 17 of this Publication.
• Sheet/plate in accordance with BS EN 1652:1998 and BS EN 1653:1998. The analysis and mechanical properties of each sheet or plate used to produce the stub ends shall comply with the requirements of Table 17 of this section.

3.4.6 Marking

3.4.6.1 All stub ends 2 in/57 mm and larger shall be clearly and permanently marked by means of a vibratory etching tool or electrochemical etching as follows:

(a)  Purchase order number (PO).

(b) The number of this section (EEMUA Publication 234: Section 3.4).

(c) Size: inches and millimeters.

(d) The nominal pressure rating: 16 bar or 20 bar.

(e) Material designation UNS 7060X.

(f) Batch traceability number (BTN).

(g) Manufacturer’s name or trademark (MTM).

Examples of marking: PO 234/3.4 2/57 20 7060X BTN MTM

Notes:

• Stamping with metallic stamps is not permitted.
• Marking shall not be on the gasket contact surfaces. 

3.4.6.2 Stub ends in sizes 11/2 in/44.5 mm and smaller where it is not practical to apply the full requirements of Section 3.4.6.1 shall be marked as follows:

(a) Material designation UNS 7060X.

(b) Batch traceability number (BTN).

(c) Manufacturer’s name or trademark (MTM).

(d) Size: inches and millimeters.

(e) Nominal pressure rating: 16 bar or 20 bar.

The remainder of the marking requirements shall be applied to indestructible-type labels securely attached to the component. The labels shall be clearly and permanently marked.

3.4.7 Inspection And Testing 

This Section does not make provision for routine pressure testing of stub ends. They shall, however, be dimensionally correct and be marked in accordance with this Section. All stub ends shall be capable of withstanding without leakage or signs of distress a hydraulic pressure as follows:

16 bar rated flanges, test pressure = 24 bar.

20 bar rated flanges, test pressure = 30 bar.

3.4.8 Certification 

Certificate(s) shall be supplied, either:

3.4.8.1 A certificate of compliance which shall manufactured in accordance with all the Publication 234: Section 3.4) or:

3.4.8.2 A Manufacturer’s certificate(s) which shall state that the stub ends have been manufactured in accordance with all the requirements of this section (EEMUA Publication 234: Section 3.4) and:

• State the actual compositional limits determined for each of the elements designated in Table 17 of the casts used in the manufacture of each batch as defined in Table 20 of BS EN 12420:2014.

In the case of stub ends produced by friction welding state the actual compositional limits determined for each of the elements separately designated in Table 17 of the casts used for producing the seamless tube and for the sheet/plate used in each batch of stub ends.

Note: Individual cast analyses shall be retained by the manufacturer see Chapter 14: discretionary contractual clauses.

• State the results of mechanical tests performed on each batch (see Section 3.4.5 – selection of test samples).

3.5 Weld Neck Backing Flanges

3.5.1 Manufacture

Backing flanges shall be of forged carbon steel to ASTM A105-14 (normalized) except that the carbon content and the carbon equivalent shall not exceed the values given in Table 18.

3.5.2 Information To Be Supplied By The Purchaser

The following shall be specified by the Purchaser on the order (for backing flanges):

• ) The title and number of this Specification (EEMUA Publication 234 Section 3.5).
• Size: inches and millimeters.
• Pressure rating: Class 150.
• Whether it is his intention to inspect the material at the supplier’s works (see Chapter 14).
• Whether manufacturer’s certificates are required (see Section 3.5.8).
• Whether any additional identification marking other than that specified herein is required.
• Whether any temporary or permanent corrosion protection is required other than that specified in Section 3.5.9.

See Section 3.4.2 for information to be supplied by the Purchaser for stub ends.

3.5.3 Drilling 

All bolt holes shall be drilled and shall be equally spaced on the pitch circle diameter ‘K’ (see Table 14).

3.5.4 Facings and Surface Finish

The outside diameters and bores of backing flanges shall be machine finished and edges shall have a radius of 3 mm in accordance with Table 14. The face of the backing flange to be in contact with the stub ends shall be machined flat.

3.5.5 Selection of Test Samples

Samples representing each lot of backing flanges shall be selected, and subjected to testing, in accordance with the requirements of ASTM A105-14.

3.5.6 Marking

Backing flanges shall be clearly marked with round-nose steel stamps around the rim. Backing flanges shall be clearly marked as follows:

• Purchase Order Number (PO).
• The number of this section (EEMUA Publication 234: section 3.5).
• Size: inches and millimeters.
• The nominal pressure rating: Class 150.
• Material designation: A105 (ASTM A105-14) see Table 8.
• Batch traceability number (BTN).
• Manufacturer’s name or trademark (MTM).

Examples of Marking:

PO 234/3.5 10/267  150 A105  BTN MTM.

3.5.7 Inspection and testing

Backing flanges shall be dimensionally correct and be marked in accordance with this section.

Backing flanges shall be visually examined for defects and irregularities in the protective coat.

3.5.8 Certification

Certificate(s) shall be supplied, either:

3.5.8.1: A certificate of compliance which shall state that the backing flanges have been manufactured in accordance with all the requirements of this Chapter (EEMUA Publication 234, Chapter 3) or:

3.5.8.2: A manufacturer’s certificate which shall state that the backing flanges have been manufactured in accordance with all the requirements of this Chapter (EEMUA Publication 234 Chapter 3) and:

• State the analysis of each heat used in the manufacture of each order (see Section 3.5: selection of test samples).
• State the results of mechanical tests performed on each heat used in the manufacture of each order (see Section 3 5.5: selection of test samples).

3.5.9 Temporary corrosion protection

Unless otherwise specified by the Purchaser flanges shall be protected against corrosion during transit and storage according to the following procedure:

• ) blast clean to standard Sa2.5 as specified in BS EN ISO 8501-1:2007(31).
• Apply blast primer of zinc rich epoxy coating to a dry film thickness of 25-50μm immediately after blast cleaning. After blast priming the identification marking shall be repeated, as necessary, by painting in such colors as to be clearly visible.