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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.

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Our Crevet Ductile Fittings range

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Applications

Applications

The Crevet® Ductile fittings are suitable for installation in the following applications:

  • Convey potable water
  • Gravity and pressure sewerage
  • Chemical and slurry solutions
  • Irrigation water

The comprehensive range of pipe, fittings and valves up to 750mm offers a pipeline solution for all applications.

DI Irontite® Pipe and Fittings Technical Guide

Advantages

Crevet® range of ductile fittings have been a popular chose for pipeline construction due to the materials advantages and characteristics.

  

Features Benefits
Complete range Allows flexibility in design and construction  
Compact design Providing benefits in packaging and handling  
Deep sockets For us with all pipe systems including PVC-O, PVC-M, PVC-U, GRP and ductile iron  
Compatible Can be used for Series 1 and Series 2 PVC pipe systems
Corrosion protected Fittings feature protective coating Plascoat
Material Options

Material Options

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
Product Details

Product Details

Standards and Approvals

Crevet® ductile iron fittings are manufactured to the Australian Product Standard under third party accreditation quality assurance systems confirming to ISO 9001.

  • AS/NZS 2280 “Ductile iron pipes and fittings”
  • AS/NZS 4020 “Testing of products for use in contact with drinking water”
  • AS 1646 “Rubber joint rings for water supply, sewerage and drainage purposes”
  • AS 1831 “Spheroidal or nodular graphite iron castings”
  • AS/NZS 4087 “Metallic flanges for waterworks purposes”
  • AS/NZS 4158 “Thermal bonded polymeric coatings on valves and fittings”
  • ISO 16132 “Ductile iron pipes and fittings, seal coats for cement mortar linings”

View Iplex Product Certifications

Rubber Ring Seals

Elastomeric seals are dual hardness EPDM rubber to AS1646. All seal configurations have been tested to AS/NZS 2280 for Elastomeric Seal Joints. The tests are carried out in the configuration of maximum design radial gap between the components to be joined. Tests include hydrostatic pressure and joint infiltration at maximum deflection angle, hydrostatic pressure and a joint infiltration test under a shear force load.

Socket Joint Deflections
DN Minimum Joint Deflection (AS/NZS 2280)
80-250 3.5°
300-600 2.5°
750
Polymeric Coatings

Thermal Bonded Polymeric Coatings (Standard Option)

Crevet® ductile fittings are supplied coated with a thermal bonded polymeric coating. Fittings can be supplied with Polyamide (thermoplastic coating) or other thermoplastic type coatings for Fusion Bonded Epoxy (FBE – thermosetting coating).

Both coating types provided the necessary protection, allowing product to be installed without the need for sleeving. Thermoplastic and Thermosetting coatings are applied and tested to the requirements of AS4158.

Coating Thickness as per AS4158

Coating Material Minimum film thickness – Internal surface (µm) Minimum film thickness – External surface (µm)
Polyamide (Thermoplastic) 250 200
FBE (Thermosetting) 350 300

Note: 1 µm = 1/1000th of a millimetre.

Cement Lining (Non-standard option)

Cement lining is applied to the requirements of AS/NZS 2280 to give a dense even surface concentric with the internal diameter of the fitting. Cement used is manufactured to AS3972. Fittings come standard with general purpose (GP) and can be supplied with Gb or SR type cement upon requires. All cement lined fittings are required to be seal coated.

Cement Mortar Lining Thicknesses

Nominal Diameter DN (mm) Lining Thickness (mm)
Nominal Minimum
80-300 6 9
375 – 750 9 7

 

Bitumen Coatings

Bitumen coating is applied to both cement lined and unlined fittings. Bitumen coatings conforms with the requirements of AS/NZS 3750.4.

Crevet® Ductile Fittings

The Crevet® ductile fittings are available from DN80 – DN750 in socket, spigot and flange combinations. The extensive range includes:

  • Tees
  • Bends
  • Connectors and Pretaps
  • Tapers
  • Crosses and Wyes
  • Bellmouths
  • Hydrant Risers
  • Dismantling Joints

With NIBF one of the only Australian foundries still locally manufacturing ductile iron fittings. Iplex and rapidly respond to requests for uncommon fitting configurations and to meet tight project time lines or assist in supplying fittings for unscheduled repairs.

Design

Installation & Testing

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