Clamps


Clamps to BS 4825 part 3

13 LB Double hinged clamp 304

BS4825 part 3

ASME BPE Compliant

Size tube O.D. A(mm) B(mm) C(mm) D(mm) E(mm)
½" -¾" DN10-20 19 28 38 26 60
1" - 1 ½" DN25-40 43 54 64 28 85
2" DN50 56 67 77 28 99
2½" - 70 80 90 28 114
3" DN65 80 94 102 28 129
4" DN100 110 122 132 28 157
6" - 153 170 175 34 217
8" - 205 220 228 34 265

Technical Data - 13LB Double hinged clamp

13LB Double hinge Pressure rating (psi) - with wing nut tightenedto 25in-lb of torque.

Temperature (°F) (°C)

½" - ¾" 1"-1½" 2" 2 ½" 3" 3½" 4" 6" 8"    
70 21 1500 500 450 400 350 300 200 150 100
250 121 1200 250 250 200 150 130 125 75 50

Saddle clamp (2 Bolt) - 304

GS™ Saddle clamp

Size Tube O.D. A mm B mm C mm D mm
10" 258.0 277.0 289.0 325.0
12" 309.0 327.5 340.0 376.0

Technical Data - Saddle clamp

2-piece saddle clamp Pressure rating (psi) - with nut tightened to 25in-lb of torque

Temperature Size Tube O.D.
°F °C 10" 12"
70 21 200 200
250 121 100 100

Clamps to BS4825 part 3 - Standard 304

13MHH - heavy clamp, single hinge

Wing Nut Type - 12

Size Tube O.D. A mm
½" -¾" 28.0
1"-1½" 53.6
2" 67.0
2½" 80.6
3" 94.0
3½" 110.0
4" 122.0
4½" 134.0
6" 170.4
8" 220.0

13MHP High pressure clamp

Brass Nut/SS304 Bolt

Size Tube O.D. A mm
1/2" - 3/4" 26.0
1½” 52.0
2” 65.5
2½” 79.0
3” 92.5
4” 120.5
6” 170.0

13MHHM - heavy clamp

Wing Nut Type - 14

Size Tube O.D. A mm
½” -¾” 28.2
1”-1 ½” 53.6
2” 67.0
2½” 80.6
3” 94.0
4” 122.0
6” 175.0

3-piece clamp

Wing Nut Type - 14

Size Tube O.D. A mm
1”-1 ½” 53.9
2” 67.4
2½” 80.9
3” 94.4
4” 122.4

Technical Data - O.D. Clamps

13MHH - heavy clamp Pressure rating (psi) - with wing nut tightened to 25in-lb of torque

Temperature Size Tube O.D.
°F °C ½" - ¾" 1"-1.5" 2" 2.5" 3" 4" 6" 8"
70 21 1500 500 450 400 350 200 150 100
250 121 1200 250 250 200 150 125 75 50

13MHHM - heavy clamp Pressure rating (psi) with wing nut tightened to 25in-lb of torque

Temperature Size Tube O.D.
°F °C ½" - ¾" 1"-1.5" 2" 2.5" 3" 4"
70 21 1500 500 450 400 350 200
250 121 1200 250 250 200 150 125

13MHP - heavy clamp Pressure rating (psi) - with nuts tightened to 20ft-lbof torque

Temperature Size Tube O.D. (Not Recommended For 1" Fittings)
°F °C 1½" 2" 2.5" 3" 4"
70 21 1000 1000 1000 1000 300
250 121 800 800 800 800 200

3-piece Clamp Pressure rating (psi) - with wing nut tightened to 25in-lb oftorque

Temperature Size Tube O.D.
°F °C ½" - ¾" 1"-1.5" 2" 2.5" 3" 4"
70 21   600 550 450 350 350
50 121   300 275 225 160 150

To convert Pressure values from psig to kPa use the following formula: psi x 6.895 = kPa (approx). Example: 200psi x 6.895 = 1379kPa.