The Bumper Ring (Spacer Ring) improves pipe protection during the handling, transportation or storage to avoid contact between the outside surface of the pipes, especially for high alloy or chromium grades pipes. Bumper Rings are prevention of damage or corrosion caused by the pipe surface coming into contact with each to other. Bumper Rings are produced in standard size range from 2 3/8“ to 13 3/8“ corresponding to the conventional pipe diameters. Upon request it is possible to manufacture the rings out of the specified range or other custom type.

Spacer Rings

Pipe Diameter [inch] Pipe Diameter [mm] Material
2 3/8” 60 Polyethylene
2 7/8” 73 Polyethylene
3 1/2” 89 Polyethylene
4” 102 Polyethylene
4 1/2” 114 Polyethylene
5” 127 Polyethylene
5 1/2” 140 Polyethylene
6 5/8” 168 Polyethylene
7” 178 Polyethylene
7 5/8” 194 Polyethylene
7 3/4” 197 Polyethylene
8 5/8” 219 Polyethylene
9 5/8” 244 Polyethylene
9 7/8” 251 Polyethylene
10 3/4” 273 Polyethylene
11 3/4” 298 Polyethylene
11 7/8” 302 Polyethylene
13 3/8” 340 Polyethylene
13 5/8” 346 Polyethylene

Material Specification

Property Unit Typical value
YIELD STRESS MPa 27
FLEXURAL MODULUS MPa 1300
CHARPY NOTCHED IMPACT STRENGTH 23°C kJ/m2 17.0
CHARPY NOTCHED IMPACT STRENGTH -30°C kJ/m2 10.0
VICAT SOFTENING TEMPERATURE °C 125
SHORE HARDNESS D 61