EEMUA 145 Welding Neck Collar
EEMUA 145 Welding Neck Collar has two type.
Type S and Type L.
The material is UNS 7060X.
Pressure Rate:16 bar, 20bar.
Welding Collar also name as inner flange.
EEMUA 145 Composite Flanges has two products, Inner Flanges and Outer Flanges


- EEMUA 145 Wedling Collar Specifications
- EEMUA 145 Welding Collar Dimension
- EEMUA 145 TYPE S INNER FLANGES 16bar
- EEMUA 145 TYPE S INNER FLANGES - 20Bar
- EEMUA 145 TYPE L INNER FLANGES - 16bar
- EEMUA 145 TYPE L INNER FLANGES - 20bar
- Welding Collar Video
- EEMUA 145 Standard
- EEMUA 145 Welding Neck Stub Ends Manufacture
- EEMUA 145 Welding Neck Stub Ends Tolerance
- EEMUA 145 Welding Neck Stub Ends Chemical Composition And Mechanical Properties
- Related Products

EEMUA 145 Welding Neck Collar Specifications
Grade:7060X
Standard : EEMUA 145
Size : 1/2″ TO 20′ IN,DN15 TO DN500

EEMUA 145 TYPE S INNER FLANGES - 16bar
Outside diameter of pipe | EEMUA145 | |||||||
16BAR | ||||||||
ØD | Wall | ØA | H | C | ØX | R1 | Theo. | |
thickness | weight | |||||||
nominal | actual | e | mm | mm | mm | mm | mm | Kg/piece |
inch | mm | mm | ||||||
0.5 | 16 | 2 | 40 | 35 | 4 | 18 | 2 | 0.07 |
0.75 | 25 | 2 | 50 | 40 | 5 | 27 | 3 | 0.16 |
1 | 30 | 2.5 | 60 | 40 | 5 | 32 | 4 | 0.2 |
1.25 | 38 | 2.5 | 70 | 40 | 5 | 40 | 4 | 0.25 |
1.5 | 44.5 | 2.5 | 80 | 45 | 6 | 46.5 | 4 | 0.42 |
2 | 57 | 2.5 | 99 | 45 | 6 | 59 | 5 | 0.5 |
2.5 | 76.1 | 2.5 | 120 | 45 | 6 | 78 | 5 | 0.67 |
3 | 88.9 | 2.5 | 130 | 50 | 7 | 91 | 5 | 0.86 |
4 | 108 | 3 | 158 | 50 | 7 | 110 | 5 | 1.18 |
6 | 159 | 3 | 212 | 50 | 9 | 161.5 | 5 | 2.2 |
8 | 219.1 | 4 | 270 | 50 | 9 | 222 | 5 | 3.2 |
10 | 267 | 4.5 | 320 | 50 | 9 | 270 | 5 | 3.9 |
12 | 323.9 | 5.5 | 370 | 50 | 11 | 327 | 7 | 6.5 |
14 | 368 | 6.5 | 430 | 50 | 11 | 371 | 7 | 7.45 |
16 | 419.1 | 7 | 482 | 50 | 12 | 422 | 7 | 9.2 |
18 | 457.2 | 8 | 530 | 50 | 12 | 460 | 7 | 11.45 |
20 | 508 | 8.5 | 585 | 50 | 12 | 511 | 7 | 13.4 |
24 | 610 | 10.5 | 685 | 60 | 14 | 613 | 9 | 20.75 |
28 | 711 | 12 | 800 | 60 | 19 | 719 | 9 | 33.35 |
32 | 813 | 13.5 | 905 | 60 | 20.5 | 821 | 9 | 42.25 |
36 | 914 | 15.5 | 1000 | 60 | 22 | 922 | 9 | 49.35 |

EEMUA 145 TYPE S INNER FLANGES - 20bar
Outside diameter of pipe | EEMUA145 | |||||||
20BAR | ||||||||
ØD | Wall | ØA | H | C | ØX | R1 | Theo. | |
thickness | weight | |||||||
nominal | actual | e | mm | mm | mm | mm | mm | Kg/piece |
inch | mm | mm | ||||||
0.5 | 16 | 2 | 40 | 35 | 4 | 18 | 2 | 0.07 |
0.75 | 25 | 2 | 50 | 40 | 5 | 27 | 3 | 0.16 |
1 | 30 | 2.5 | 60 | 40 | 5 | 32 | 4 | 0.2 |
1.25 | 38 | 2.5 | 70 | 40 | 5 | 40 | 4 | 0.25 |
1.5 | 44.5 | 2.5 | 80 | 45 | 6 | 46.5 | 4 | 0.42 |
2 | 57 | 2.5 | 99 | 45 | 6 | 59 | 5 | 0.5 |
2.5 | 76.1 | 2.5 | 120 | 45 | 6 | 78 | 5 | 0.67 |
3 | 88.9 | 2.5 | 130 | 50 | 7 | 91 | 5 | 0.86 |
4 | 108 | 3 | 158 | 50 | 7 | 110 | 5 | 1.2 |
6 | 159 | 3.5 | 212 | 50 | 9 | 161.5 | 5 | 2.2 |
8 | 219.1 | 4.5 | 270 | 50 | 9 | 222 | 5 | 3.3 |
10 | 267 | 5.5 | 320 | 50 | 9 | 270 | 5 | 4.2 |
12 | 323.9 | 7 | 370 | 50 | 11 | 327 | 7 | 6.8 |
14 | 368 | 8 | 430 | 50 | 11 | 371 | 7 | 8.2 |
16 | 419.1 | 9 | 482 | 50 | 12 | 422 | 7 | 10.35 |
18 | 457.2 | 9.5 | 530 | 50 | 12 | 460 | 7 | 12.4 |
20 | 508 | 11 | 585 | 50 | 12 | 511 | 7 | 15.1 |
24 | 610 | 13 | 685 | 60 | 14 | 613 | 9 | 23.25 |
28 | 711 | 15 | 800 | 60 | 19 | 719 | 9 | 36.8 |
32 | 813 | 17 | 905 | 60 | 20.5 | 821 | 9 | 46.85 |
36 | 914 | 19 | 1000 | 60 | 22 | 922 | 9 | 54.55 |

EEMUA 145 TYPE L INNER FLANGES - 16bar
Outside diameter of pipe | EEMUA145 | |||||||
16BAR | ||||||||
ØD | Wall | ØA | H | C | ØX | R1 | Theo. | |
thickness | weight | |||||||
nominal | actual | e | mm | mm | mm | mm | mm | Kg/piece |
inch | mm | mm | ||||||
0.5 | 16 | 2 | 40 | 51 | 4 | 18 | 2 | 0.09 |
0.75 | 25 | 2 | 50 | 51 | 5 | 27 | 3 | 0.19 |
1 | 30 | 2.5 | 60 | 51 | 5 | 32 | 4 | 0.23 |
1.25 | 38 | 2.5 | 70 | 51 | 5 | 40 | 4 | 0.29 |
1.5 | 44.5 | 2.5 | 80 | 51 | 6 | 46.5 | 4 | 0.44 |
2 | 57 | 2.5 | 99 | 64 | 6 | 59 | 5 | 0.61 |
2.5 | 76.1 | 2.5 | 120 | 64 | 6 | 78 | 5 | 0.8 |
3 | 88.9 | 2.5 | 130 | 64 | 7 | 91 | 5 | 0.97 |
4 | 108 | 3 | 158 | 76 | 7 | 110 | 5 | 1.5 |
6 | 159 | 3 | 212 | 89 | 9 | 161.5 | 5 | 2.9 |
8 | 219.1 | 4 | 270 | 102 | 9 | 222 | 5 | 5.1 |
10 | 267 | 4.5 | 320 | 127 | 9 | 270 | 5 | 8.9 |
12 | 323.9 | 5.5 | 370 | 152 | 11 | 327 | 7 | 13.8 |
14 | 368 | 6.5 | 430 | 152 | 11 | 371 | 7 | 16.6 |
16 | 419.1 | 7 | 482 | 152 | 12 | 422 | 7 | 20.25 |
18 | 457.2 | 8 | 530 | 152 | 12 | 460 | 7 | 23.6 |
20 | 508 | 8.5 | 585 | 152 | 12 | 511 | 7 | 28.65 |
24 | 610 | 10.5 | 685 | 152 | 14 | 613 | 9 | 39.25 |
28 | 711 | 12 | 800 | 190 | 19 | 719 | 9 | 75.3 |
32 | 813 | 13.5 | 905 | 190 | 20.5 | 827 | 9 | 94.6 |
36 | 914 | 15.5 | 1000 | 190 | 22 | 922 | 9 | 115.55 |

EEMUA 145 TYPE L INNER FLANGES - 20bar
Outside diameter of pipe | EEMUA145 | |||||||
20BAR | ||||||||
ØD | Wall | ØA | H | C | ØX | R1 | Theo. | |
thickness | weight | |||||||
nominal | actual | e | mm | mm | mm | mm | mm | Kg/piece |
inch | mm | mm | ||||||
0.5 | 16 | 2 | 40 | 51 | 4 | 18 | 2 | 0.09 |
0.75 | 25 | 2 | 50 | 51 | 5 | 27 | 3 | 0.19 |
1 | 30 | 2.5 | 60 | 51 | 5 | 32 | 4 | 0.23 |
1.25 | 38 | 2.5 | 70 | 51 | 5 | 40 | 4 | 0.29 |
1.5 | 44.5 | 2.5 | 80 | 51 | 6 | 46.5 | 4 | 0.44 |
2 | 57 | 2.5 | 99 | 64 | 6 | 59 | 5 | 0.61 |
2.5 | 76.1 | 2.5 | 120 | 64 | 6 | 78 | 5 | 0.8 |
3 | 88.9 | 2.5 | 130 | 64 | 7 | 91 | 5 | 0.97 |
4 | 108 | 3 | 158 | 76 | 7 | 110 | 5 | 1.5 |
6 | 159 | 3.5 | 212 | 89 | 9 | 161.5 | 5 | 2.9 |
8 | 219.1 | 4.5 | 270 | 102 | 9 | 222 | 5 | 5.2 |
10 | 267 | 5.5 | 320 | 127 | 9 | 270 | 5 | 9.8 |
12 | 323.9 | 7 | 370 | 152 | 11 | 327 | 7 | 15.4 |
14 | 368 | 8 | 430 | 152 | 11 | 371 | 7 | 19 |
16 | 419.1 | 9 | 482 | 152 | 12 | 422 | 7 | 23.95 |
18 | 457.2 | 9.5 | 530 | 152 | 12 | 460 | 7 | 26.4 |
20 | 508 | 11 | 585 | 152 | 12 | 511 | 7 | 33.85 |
24 | 610 | 13 | 685 | 152 | 14 | 613 | 9 | 45.5 |
28 | 711 | 15 | 800 | 190 | 19 | 719 | 9 | 86.2 |
32 | 813 | 17 | 905 | 190 | 20.5 | 821 | 9 | 100.15 |
36 | 914 | 19 | 1000 | 190 | 22 | 922 | 9 | 131.95 |

Composite Flanges Video

EEMUA 145 Weld Neck Stub End Basic Info
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 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.

EEMUA 145 Weld Neck Stub Ends Manufacture
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.

EEMUA 145 Weld Neck Collar Flanges Tolerance

Chemical Composition and Mechanical Properties
Chemical Composition And Mechanical Properties For Wrought 90/10 Cu Ni Weld-Neck Stub Ends