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Supplier: James Walker

Chieftain® is James Walker's premium grade universal sheet jointing.

Price Guide: POA

Its formulation contains an advanced carbon fibre material and a nitrile rubber (NBR) binder. An anti-stick finish to both surfaces is supplied as standard.

Prime features

•Carbon fibre for strength and stability.
•450°C maximum temperature.
•Outstanding chemical and steam resistance.
•User friendly - easy to cut, handle and remove from flanges.

•Easily meets the requirements of BS7531 Grade X.
•Suitable for ASME Class 300 flange ratings to at least 260°C.
Physical properties
(Typical values for 1.5mm thick material)
Density, Mg/m³ : 1.6
Transverse tensile strength, MPa : 9.0 (ASTM F152)
Residual stress, MPa : 28.0 (BS7531)
Compressibility, % : 9.0 (BS7531)
Recovery, % : 60.0 (ASTM F36J)
Flexibility after accelerated ageing : Pass (BSF125)
Gas permeability, ml/min : <1.0 (BS7531)
Leachable chloride ion content, ppm : <100

Fluid immersion properties
IRM 903, % thickness increase, 5h @ 150°C : 6.0 (BS7531)
Water, % thickness increase, 5h @ 100°C : 5.0 (BS7531)
ASTM fuel B, % thickness increase, 5h @ RT : 8.0 (ASTM F146)
Sodium hydroxide (50% concentration), % thickness increase, 10h @ 100°C : 13.0

Service capability
For service capability graphs click here to refer to the Gaskets & Jointings guide pdf (1.58MB).

How supplied
Precision cut gaskets to any shape, size and quantity. In sheets 2.0m x 1.5m, 1.5m x 1.0m. Thicknesses: 0.5mm, 0.75mm, 1.0mm, 1.5mm, 2.0mm. Please note that 3.0mm is also available but is not recommended.

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