Groove fittings are steel pipe connection fittings, also known as clamp connections, with many advantages.
The design specification for automatic fire sprinkler systems states that the system piping should be connected using grooved couplings, threaded connections, or flange connections. For pipes with a diameter equal to or greater than 100mm, flange or grooved couplings should be used for segmented connections.
Grooved coupling technology, also known as mechanical coupling technology, has become the preferred method for connecting liquid and gas pipelines, gradually replacing the traditional methods of flange and welding connections.
The application of grooved coupling technology simplifies and expedites the complex process of pipeline connections, representing a significant advancement in pipeline connection technology.
Red color serves as a visual indicator to identify the pipes and fittings as part of the fire protection system. Red epoxy coating not only helps distinguish the purpose, but also provides additional protection against corrosion, making it more suitable for use in wet environments.
Youfa brand red coating fire sprinkler pipes and fittings with and UL certification provide high quality and safety and are a reliable choice in fire protection systems.
Standard: ANSI B36.10, JIS B2302,ASME/ANSI/BS1560/DIN2616 etc.
Material: Cast Iron, Ductile Iron
Surface: Red Painted or Blue Painted or Silver Painted
MECHANICAL CROSS (GROOVED)
| NORMAL SIZE (mm/in) | OUTSIDE DIAMETER(mm) |
| 100x50(4x2) | 114.3x60.3 |
| 100x65 (4x2-1/2) | 114.3x73 |
| 100x65(4x2-1/2) | 114.3x76. 1 |
| 100x80(4x3) | 114.3x88.9 |
| 125x65(5x2-1/2) | 139.7x76. 1 |
| 125x80(5x3) | 139.7x88.9 |
| 150x65(6x2-1/2) | 165.1x 76. 1 |
| 150x80(6x3) | 165.1x88.9 |
| 150x100(6x4) | 165.1x114.3 |
| 200x65(8x2-1/2) | 219.1x76.1 |
| 200x80(8x3) | 219.1x88.9 |
| 200x100(8x4) | 219.1x114.3 |
MECHANICAL CROSS (THREADED)
| NORMAL SIZE (mm/in) | OUTSIDE DIAMETER(mm) |
| 50x25(2x1) | 60.3xRcl |
| 65x25(2-1/2x1) | 76. lxRcl |
| 65x40(2-1/2x1-1/2) | 76. lxRcl-1/2 |
| 80x25(3x1) | 88.9xRcl |
| 80x50(3x2) | 88.9xRc2 |
| 100x25(4x1) | 108xRcl |
| 100x65 (4x2-1/2) | 114.3xRc2-1/2 |
| 125x25(5x1) | 133xRcl |
| 125x80(5x3) | 133xRc3 |
| 125x25(5x1) | 139.7xRcl |
| 150x25(6x1) | 159xRcl |
| 150x80(6x3) | 165. 1xRc3 |
| 200x25(8x1) | 219. lxRcl |
| 200x80(8x3) | 219. 1xRc3 |
MECHANICAL TEE (GROOVED)
| NORMAL SIZE (mm/in) | OUTSIDE DIAMETER(mm) |
| 100x50(4x2) | 114,3x60.3 |
| 100x80(4x3) | 114.3x88.9 |
| 125x65(5x2-1/2) | 139.7x76.1 |
| 125x80(5x3) | 139.7x88.9 |
| 150x65 (6x2-1/2） | 165.1x76.1 |
| 150x100 (6x4) | 165.1x114.3 |
| 200x65(8x2-1/2) | 219.1x76.1 |
| 200x100(8x4) | 219.1x114.3 |
MECHANICAL TEE (THREADED)
| NORMAL SIZE (mm/in) | OUTSIDE DIAMETER(mm) |
| 50x25(2x1) | 60.3xRcl |
| 65x25(2-1/2x1) | 76. lxRcl |
| 65x40(2-1/2x1-1/2) | 76. lxRcl-1/2 |
| 80x25(3x1) | 88.9xRcl |
| 80x50(3x2) | 88.9xRc2 |
| 100x25(4x1) | 108xRcl |
| 100x65(4x2-1/2) | 108xRc2-1/2 |
| 100x25(4x1) | 114.3xRcl |
| 100x65 (4x2-1/2) | 114.3xRc2-1/2 |
| 125x25(5x1) | 133xRcl |
| 125x80(5x3) | 133xRc3 |
| 125x25(5x1) | 139.7xRcl |
REDUCING TEE (GROOVED)
| NORMAL SIZE (mm/in) | OUTSIDE DIAMETER(mm) |
| 65x50(2/1/2x2) | 76.1x60.3 |
| 80x65(3x2-1/2) | 88.9x76.1 |
| 100x50(4x2-1/2) | 108x76.1 |
| 100x50(4x2) | 114.3x60.3 |
| 100x80(4x3) | 114.3x88.9 |
| 125x100(5x4) | 133x108 |
| 125x65(5x2-1/2) | 139.7x76.1 |
| 125x100 (5x4) | 139.7x114.3 |
| 150x100(6x4) | 159x108 |
| 150x125(6x5) | 159x133 |
| 150x65 (6x2-1/2） | 165.1x 76. 1 |
| 150x125(6x5) | 165.1x139.7 |
| 200x50(8x2) | 219.1x60.3 |
| 200x150(8x6) | 219.1x165.1 |
TEE (GROOVED)
| NORMAL SIZE (mm/in) | OUTSIDE DIAMETER(mm) |
| 50(2) | 60.3 |
| 65(2-1/2) | 76.1 |
| 80(3) | 88.9 |
| 100⑷ | 108 |
| 100⑷ | 114.3 |
| 125(5) | 133 |
| 125(5) | 139.7 |
| 150⑹ | 159 |
| 150(6) | 165.1 |
| 150⑹ | 168.3 |
| 200⑻ | 219.1 |
REDUCING CROSS (GROOVED)
| NORMAL SIZE (mm/in) | OUTSIDE DIAMETER(mm) |
| 100x65(4x2-1/2) | 114.3x76 |
| 100x80(4x3) | 114.3x88.9 |
| 125x65(5x2-1/2) | 139.7x76 |
| 125x100(5x4) | 139.7x114.3 |
| 150x65(6x2-1/2) | 165.1x76 |
| 150x125(6x5) | 165.1x139. 7 |
| 200x100(8x4) | 219.1x114.3 |
| 200x150(8x6) | 219.1x165.1 |
CROSS (GROOVED)
| NORMAL SIZE (mm/in) | OUTSIDE DIAMETER(mm) |
| 65(2-1/2) | 76.1 |
| 80⑶ | 88.9 |
| 100⑷ | 114.3 |
| 125⑸ | 139.7 |
| 150(6) | 165 |
| 200⑻ | 219.1 |
45° Elbow
22.5° Elbow
90° Elbow
| NORMAL SIZE (mm/in) | OUTSIDE DIAMETER(mm) |
| 50⑵ | 60.3 |
| 65(2-1/2) | 76.1 |
| 80⑶ | 88.9 |
| 100⑷ | 108 |
| 100⑷ | 114.3 |
| 125⑸ | 133 |
| 125(5) | 139.7 |
| 150⑹ | 159 |
| 150⑹ | 165 |
| 200⑻ | 219.1 |
REDUCER (THREADED)
| NORMAL SIZE (mm/in) | OUTSIDE DIAMETER(mm) |
| 50x20(2x3/4) | 60.3xRc3/4 |
| 50x40 (2x1-1/2) | 60.3xRcl-1/2 |
| 65x25(2-1/2x1) | 76. lxRcl |
| 65 x 50 (2-1/2 x 2) | 76. 1xRc2 |
| 80x25(3x1) | 88.9xRcl |
| 80x65(3x2-1/2) | 88.9xRc2-1/2 |
| 100x25(4x1) | 108xRcl |
| 100x25(4x1) | 114.3xRcl |
| 125x25(5x1) | 133xRcl |
| 125x25(5x1) | 139.7xRcl |
| 150x25(6x1) | 159xRcl |
| 150x80(6x3) | 159xRc3 |
| 150x25(6x1) | 165. lxRcl |
| 150x80(6x3) | 165. 1xRc3 |
| 200x25(8xRcl) | 219. lxRcl |
| 200x80(8x3) | 219. 1xRc3 |
REDUCER (GROOVED)
| NORMAL SIZE (mm/in) | OUTSIDE DIAMETER(mm) |
| 65 x 50 (2-1/2 x 2) | 76.1x60.3 |
| 80x50(3x2) | 88.9x60.3 |
| 80x65(3x2-1/2) | 88.9x76.1 |
| 100x65(4x2-1/2) | 108x76.1 |
| 100x80(4x3) | 108x88.9 |
| 100x50(4x2) | 114.3x60.3 |
| 100x80(4x3) | 114.3x88.9 |
| 125x65(5x2-1/2) | 133x76.1 |
| 125x100(5x4) | 133x114.3 |
| 125x50(5x2) | 139.7x60.3 |
| 125x100(5x4) | 139.7x114.3 |
| 150x65(6x2-1/2) | 159x76.1 |
| 150x125(6x5) | 159x139.7 |
| 150x50(6x2) | 165.1x60.3 |
| 150x125(6x5) | 165.1x139.7 |
| 200x65(8x2) | 219.1x60.3 |
| 200x150(8x6) | 219.1x165.1 |
HEAVY DUTY FLANGE
(GROOVED)
| NORMAL SIZE(mm/in) | OUTSIDE DIAMETER(mm) | WORKING PRESSURE(MPA) | DIMENSIONS(MM) | NO. OF HOLES | |||
| A | B | c | D | ||||
| 65(2-1/2) | 76.1 | 2.5 | 63.5 | 17 | 185 | 145 | 8 |
| 65⑶ | 88.9 | 2.5 | 63.5 | 17 | 200 | 160 | 8 |
| 100⑷ | 108 | 2.5 | 67.5 | 16.5 | 235 | 190 | 8 |
| 100⑷ | 114.3 | 2.5 | 68 | 15 | 230 | 190 | 8 |
| 150⑹ | 159 | 2.5 | 68 | 17 | 300 | 250 | 8 |
| 150⑹ | 165.1 | 2.5 | 68 | 17 | 300 | 250 | 8 |
| 200⑻ | 219.1 | 2.5 | 77 | 20 | 360 | 310 | 12 |
ADAPTOR FLANGE
(GROOVED)
| NORMAL SIZE(mm/in) | OUTSIDE DIAMETER(mm) | WORKING PRESSURE(MPA) | DIMENSIONS(MM) | NO. OF HOLES | |||
| A | B | c | D | ||||
| 50⑵ | 60.3 | 1.6 | 50 | 15 | 160 | 125 | 4 |
| 65(2-1/2) | 76.1 | 1.6 | 50 | 15 | 178 | 145 | 4 |
| 80⑶ | 88.9 | 1.6 | 50 | 15 | 194 | 160 | 8 |
| 100⑷ | 108 | 1.6 | 55 | 15 | 213 | 180 | 8 |
| 100⑷ | 114.3 | 1.6 | 55 | 15 | 213 | 180 | 8 |
| 125⑸ | 133 | 1.6 | 58 | 17 | 243 | 210 | 8 |
| 125⑸ | 139.7 | 1.6 | 58 | 17 | 243 | 210 | 8 |
| 150⑹ | 159 | 1.6 | 65 | 17 | 280 | 240 | 8 |
| 150⑹ | 165.1 | 1.6 | 65 | 17 | 280 | 240 | 8 |
| 200⑻ | 219.1 | 1.6 | 78 | 19 | 340 | 295 | 812 |
BLIND FLANGE
| NORMAL SIZE(mm/in) | OUTSIDE DIAMETER(mm) | WORKING PRESSURE(MPA) | HEIGHT(MM) | |
| 50⑵ | 60.3 | 2.5 | 28 | |
| 65(2-1/2) | 76.1 | 2.5 | 28 | |
| 80⑶ | 88.9 | 2.5 | 29 | |
| 100⑷ | 108 | 2.5 | 31 | |
| 100⑷ | 114.3 | 2.5 | 31 | |
| 125(5) | 133 | 2.5 | 31.5 | |
| 125⑸ | 139.7 | 2.5 | 31.5 | |
| 150⑹ | 159 | 2.5 | 31.5 | |
| 150⑹ | 165.1 | 2.5 | 31 | |
| 200⑻ | 219.1 | 2.5 | 36.5 | |
THREADED FLANGE
| NORMAL SIZE (mm/in) | OUTSIDE DIAMETER(mm) | WORKING PRESSURE(MPA) | DIMENSIONS(MM) | NO. OF HOLES | |||
| A | B | c | D | ||||
| 25⑴ | Rcl | 1.6 | 18 | 10 | 85 | 110 | 4 |
| 32(1-1/4) | Rcl-1/4 | 1.6 | 18 | 11 | 100 | 130 | 4 |
| 40(1-1/2) | Rcl-1/2 | 1.6 | 19 | 13 | 110 | 145 | 4 |
| 50(2) | Rc2 | 1.6 | 20 | 13 | 125 | 155 | 4 |
| 65(2-1/2) | Rc2-1/2 | 1.6 | 21 | 15 | 144 | 178 | 4 |
| 80⑶ | Rc3 | 1.6 | 25.5 | 15 | 160 | 193.5 | 8 |
| 100⑷ | Rc4 | 1.6 | 25.75 | 15 | 180 | 213.5 | 8 |
BOLTS & NUTS
| SIZE | THREADED LENGTH L1 | TOTAL LENGTH | FISHTAIL BOLT WIDTH | NUT WIDHT |
| M10 x 55 | 30±3 | 55±1.2 | 14. 5±0. 5 | 9. 6~10 |
| M10 x 60 | 30±3 | 60±1.2 | 14.5 + 0.5 | 9. 6~10 |
| M10 x 65 | 30±3 | 65±1.2 | 14. 5±0. 5 | 9. 6~10 |
| M12 x 65 | 36+4 | 65±1.2 | 15.2±0.4 | 11. 6~12 |
| M12 x 70 | 36+4 | 70+1. 2 | 15.2±0.4 | 11. 6 ~12 |
| M12 x 75 | 41+4 | 75+1. 2 | 15.2±0.4 | 11. 6 ~12 |
| M16 x 85 | 44+4 | 85+1. 2 | 19. 0-19. 9 | 15. 3~16 |
| M20 x 120 | 50+5 | 120+2. 0 | 24±0.8 | 18. 9~20 |
The mechanical properties of bolts shall not be lower than grade 8.8 specified in GB / T 3098.1, and the thread tolerance shall be 6G. The mechanical properties of the nut shall comply with Grade 8 requirements specified for nuts in GB / T 3098.2, thread tolerance 6h.
GASKET RING
| NAME | GASKET | GENERAL SERVICE RECOMMENDATION | TEMPERATURE RANGE |
| EPDM | E | Water supply, drainage, sewage and normal temperature air, weak acid and weak alkali | -30°C~+130°C |
| NBR | D | Petroleum based oils | -20°C〜+80°C |
| SILICOMN RUBBER | S | Drinking water, hot dry air and some hot chemicals | -40°C~+180°C |