MATERIAL SPECIFICATIONS
Part | Material |
Flanges | Ductile Iron (DN32…DN300) Carbon Steel (DN350…DN600) Stainless Steel 304 Stainless Steel 316 |
Reinforcing Ring | Carbon Steel |
Inner Rubber | EPDM |
Outer Rubber | EPDM |
Reinforcing Cord | Nylon |
Control Rod | Mild Steel |
Notes: Carbon steel flanges only available for PN25 (DN25 … DN300)
OPERATING PRESSURE & TEMPERATURE
DIMENSIONS AND MOVEMENTS
Diameter | Dimension | Pre-Gap | Allowable Movements(mm) | ||||
mm | inch | L(mm) | L(mm) | Axial Elongation(mm) | Axial Compression(mm) | Lateral Displacement(mm) | Angle of Deflection(“) |
32 | 1¼ | 175 | 170-180 | 20 | 30 | 45 | 30 |
40 | 1½ | 175 | 170-180 | 20 | 30 | 45 | 30 |
50 | 2 | 175 | 170-180 | 20 | 30 | 45 | 30 |
65 | 2½ | 175 | 170-180 | 25 | 50 | 45 | 30 |
80 | 3 | 175 | 170-180 | 25 | 50 | 45 | 30 |
100 | 4 | 225 | 220-230 | 35 | 50 | 35 | 30 |
125 | 5 | 225 | 220-230 | 35 | 50 | 35 | 30 |
150 | 6 | 225 | 220-230 | 35 | 50 | 35 | 30 |
200 | 8 | 325 | 320-330 | 35 | 50 | 30 | 30 |
250 | 10 | 325 | 320-330 | 35 | 50 | 30 | 15 |
300 | 12 | 325 | 320-330 | 35 | 50 | 30 | 15 |
350 | 14 | 345 | 340-350 | 25 | 40 | 28 | 10 |
400 | 16 | 345 | 340-350 | 25 | 40 | 28 | 10 |
450 | 18 | 345 | 340-350 | 25 | 40 | 28 | 10 |
500 | 20 | 345 | 340-350 | 25 | 40 | 28 | 10 |
600 | 24 | 345 | 340-350 | 25 | 40 | 28 | 10 |
USE OF CONTROL UNITS WITH RUBBER FLEXIBLE JOINTS
A control unit assembly is an accessory of two or more control rod units (limit rods, tie rods or compression sleeves) placed between the flanges across a flexible joint to minimize possible destruction caused by excessive motion of a pipeline. When used in this manner, control units are an additional safety factor which can minimize possible damage to the adjacent equipment.
A control unit is strongly recommended to use when:
– In case that proper anchoring cannot be provided.
– In case that it is hard to withstand the line thrusts generated by internal pressure or wide temperature fluctuations.
– In case that the anticipated elongation, compression and lateral movement are more than the design, pre-gap and/or installation tolerance.
– In case that the anticipated angle of deflection is more than the design and/or installation tolerance.
RECOMMENDED QUANTITY FOR CONTROL RODS
DN(mm) | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 |
Quantity | N/A | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 4 | 4 | 4 | 4 | 4 |