ISO 5019-5:1984

Overview

ISO 5019-5:1984 - Refractory bricks - Dimensions - Part 5: Skewbacks (Sommier) is an international standard published by ISO (first edition 1984-09-15) that specifies standard dimensions for two types of skewbacks (French: sommier) intended for use with refractory arch bricks. The document was prepared by ISO/TC 33 (Refractory materials).

Key topics and requirements

• Two standard sizes: The standard defines skewbacks for use with refractory bricks of 64 mm and 76 mm height.
• Reference drawings and volumes: Dimensional representations are given in two figures; the 64 mm skewback has a listed volume of 5.57 dm³, and the 76 mm skewback a volume of 4.72 dm³.
• Compatibility: These skewbacks are intended to be used together with the corresponding series of arch bricks whose dimensions are specified in ISO 5019-2.
• Tolerances: Dimensional tolerances are not fixed in the standard and must be agreed between buyer and supplier, allowing contractual flexibility for manufacturing and application needs.
• Recommendation: Adoption of the 76 mm series is strongly recommended. The standard also notes the existence of North American skewback formats with dimensions very close to those in ISO 5019-5.

Applications and users

ISO 5019-5 is directly useful to:

• Refractory brick manufacturers - for consistent production and correct volumes for skewback pieces.
• Furnace, kiln and boiler designers - to specify compatible skewbacks when designing arches and supports in refractory linings.
• Installation contractors and bricklayers - to select correct skewback sizes to match arch brick series (per ISO 5019-2).
• Procurement specialists and spec writers - for clear product specifications and commercial agreements on tolerances.
• Standards bodies and testing labs - for cross-reference and harmonization with other refractory dimensions.

Related standards

• ISO 5019-2 - Refractory bricks - Dimensions - Part 2: Arch bricks (reference for compatible arch brick dimensions).
• ISO 5019 series and documents produced by ISO/TC 33 (Refractory materials) for broader guidance on refractory brick formats and dimensions.

This concise guidance on ISO 5019-5:1984 helps ensure consistent sizing and interchangeability of skewbacks in refractory linings, aiding manufacturers, designers and purchasers in achieving reliable furnace and kiln construction. Keywords: ISO 5019-5:1984, refractory bricks, skewbacks, sommier, dimensions, 64 mm, 76 mm, tolerances, ISO 5019-2.