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Crevet Ductile Fittings

Iplex’s foundry NIBF (Northern Iron and Brass Foundry) manufactures the Crevet® range of ductile iron fittings for the water industry. These fittings are produced in diameters from 80mm to 750mm and are compatible with Irontite® DI, PVC, GRP and AC pipelines.

Material Properties

Mechanical Properties
Property Value & Unit
Density (Specific Gravity) 7.1
Ultimate tensile strength 400MPa
Yield Strain 12%
Tensile Modulus 170MPa
Hardness Brinell 230
Poisson’s Ratio 0.3
Design Stress 130MPa
Ring bending modulus (3 mins) 165MPa
Ring bending modulus (50 yrs) 165MPa
Thermal Properties
Property Value & Unit
Coefficient of Thermal Expansion 12.5 x 10³/°C
Flammability Non-Flammable
Allowable Operating Temperature 50°C
Allowable Pressure Ratings

Allowable pressure ratings table for fittings used within a PN20 or PN35 pipeline with integral joints.

DN Allowable Operating Pressure - MPa Allowable Maximun Operating Pressure - MPa Allowable Site Test Pressure - MPa
80-750 3.5 4.2 4.38
80-750 2.0 2.4 2.50

Allowable pressure ratings table for fittings used within a PN35 pipeline with flange joints.

Flange to AS4087 DN Allowable Operating Pressure - MPa Allowable Max. Operating Pressure - MPa Allowable Site Test Pressure - MPa
PN16 80-750 1.6 1.92 2.0
PN35 80-750 3.5 4.2 4.38