SYI can supply the Dedicated Couplings dedicated Couplings, dedicated to connect the ductile iron pipe (upto DN2200)

SYI S. N. | DN | pipe O.D. | O.D. Tolerance | D2 | H | L | Min. pipe end prepared length | |
mm | ||||||||
DC40 | 40 | 56 | +1.0 | -3.0 | 120 | 102 | 166 | 100 |
DC50 | 50 | 66 | +1.0 | -3.0 | 126 | 102 | 166 | 100 |
DC60 | 60 | 77 | +1.0 | -3.0 | 135 | 102 | 166 | 100 |
DC65 | 65 | 82 | +1.0 | -3.0 | 156 | 102 | 166 | 100 |
DC80 | 80 | 98 | +1.0 | -3.0 | 184 | 102 | 166 | 100 |
DC100 | 100 | 118 | +1.0 | -3.0 | 205 | 102 | 166 | 100 |
DC125 | 125 | 144 | +1.0 | -3.0 | 232 | 102 | 166 | 100 |
DC150 | 150 | 170 | +1.0 | -3.0 | 264 | 102 | 173 | 100 |
DC200 | 200 | 222 | +1.0 | -3.5 | 315 | 102 | 173 | 100 |
DC250 | 250 | 274 | +1.0 | -3.5 | 374 | 102 | 173 | 100 |
DC300 | 300 | 326 | +1.0 | -3.5 | 426 | 102 | 173 | 100 |
DC350 | 350 | 378 | +1.0 | -3.5 | 494 | 152 | 254 | 150 |
DC400 | 400 | 429 | +1.0 | -4.0 | 544 | 152 | 254 | 150 |
DC450 | 450 | 480 | +1.0 | -4.0 | 595 | 152 | 254 | 150 |
DC500 | 500 | 532 | +1.0 | -4.0 | 650 | 152 | 254 | 150 |
DC600 | 600 | 635 | +1.0 | -4.5 | 753 | 152 | 254 | 150 |
DC700 | 700 | 738 | +1.0 | -4.5 | 858 | 152 | 254 | 150 |
DC800 | 800 | 842 | +1.0 | -4.5 | 962 | 152 | 254 | 150 |
DC900 | 900 | 945 | +1.0 | -5.0 | 1070 | 178 | 280 | 150 |
DC1000 | 1000 | 1048 | +1.0 | -5.0 | 1173 | 178 | 280 | 150 |
DC1100 | 1100 | 1152 | +1.0 | -6.0 | 1282 | 178 | 280 | 150 |
DC1200 | 1200 | 1255 | +1.0 | -6.0 | 1385 | 178 | 280 | 150 |
DC1400 | 1400 | 1462 | +1.0 | -6.0 | 1592 | 178 | 295 | 150 |
DC1500 | 1500 | 1565 | +1.0 | -6.0 | 1691 | 178 | 295 | 150 |
DC1600 | 1600 | 1668 | +1.0 | -6.0 | 1798 | 178 | 295 | 150 |
DC1800 | 1800 | 1875 | +1.0 | -6.0 | 2015 | 254 | 375 | 150/300 |
DC2000 | 2000 | 2082 | +1.0 | -6.0 | 2222 | 254 | 375 | 150/300 |
DC2200 | 2200 | 2288 | +1.0 | -6.0 | 2415 | 254 | 375 | 150/300 |


1. Material
BODY: Ductile Iron grade 500-7/450-10 in accordance with ISO 1083 or 70-50-05/65-45-12 with ASTM A536
GLAND: Ductile Iron grade 500-7/450-10 in accordance with ISO 1083 or 70-50-05/65-45-12 with ASTM A536
GASKET: Rubber E.P.D.M./SBR/NBR in accordance with EN 681.1
D-BOLTS AND NUTS: Carbon Steel Grade 8.8 with dacromet coating
3. Fluid Temperature: 0°C - 50°C, excluding frost
5. Joint Gap:19mm
6. Coating
External Coatings: Liquid epoxy resin painting Epoxy applied by FBE According to customers' requirements | Internal Coatings: Liquid epoxy resin painting Epoxy applied by FBE According to customers' requirements |
Designed and tested in accordance with EN14525, ANSI/AWWA C219 and EN545


Quality Control


are ready. We are capable to finish all the production processes from moulding, shot-blasting, machining, coating to packaging. We have over 100,000 m2 foundry land including:
-10,000 m2 of the pattern, sand mixing, polishing, machining, hydraulic pressure, coating, packaging workshops;
-4,000 m2 of three green sand moulding workshops and one resin sand moulding workshops;
-3,000 m2 of automatic moulding machine line and epoxy coating line
-professional laboratory
-machining shop
-and our own tooling shop
Strict process and operating regulations together with perfect quality assurance system making every production step under control. All the products are subject to tests and inspections including composition analysis, metallographic examination, dimension & surface finish inspection, ring test, tensile test, hardness test, hydrostatic test, lining and coating test to be sure that the products meet the requirements of the standards.
Since 2009, SYI Pipeline has developed from a pipes & fittings seller to a professional project solution provider, including the one stop service and solution from pipes, fittings, couplings & flanged adaptors, valves, fire hydrants, to water meters and accessories.

SYI products have served 111 countries worldwide up to now!
Most of these customers cooperated with SYI for more than 20 years!
We value long term cooperation relationship mostly!



Welcome to send us an inquiry for more details and price!!!