BS ISO 7788:2021

What is this ISO 7788 - Surface finish of hot-rolled plates and wide flats about?

ISO 7788 discusses the steel and surface finish of hot-rolled plates and wide flats with a focus on delivery requirements.

ISO 7788 specifies delivery requirements applicable to the surface finish of hot-rolled plates rolled on reversing mills and wide flats, with a nominal thickness ≥3 mm and ≤400 mm.

Who is ISO 7788 - Surface finish of hot-rolled plates and wide flats for?

ISO 7788 on surface finish of hot-rolled plates and wide flats is useful for:

• Steel manufacturers and suppliers
• Constitution industries
• Steel testing laboratories
• Quality control department

Why should you use ISO 7788 - Surface finish of hot-rolled plates and wide flats?

Responsibility for the required surface condition, whether the product is delivered descaled or not, rests with the material producer, who has to take the necessary precautions. The producer can only take account of discontinuities that are visible to the naked eye. Rolling or heat-treatment scale can conceal surface discontinuities.

ISO 7788 discusses classification, requirements, depth and affected area of discontinuities, repair requirements, repair procedures, and action to undertake in function of the depth of discontinuities and nominal thickness of the products.

ISO 7788 will help to understand the requirements applicable to the surface finish of hot-rolled plates rolled on reversing mills and wide flats.

What’s changed since the last update?

BS ISO 7788:2021 supersedes ISO 7788:1985, which is withdrawn. BS ISO 7788:2021 includes some technical changes with respect to ISO 7788:1985.

These include:

• Updated normative reference
• New definitions added and definitions in former Annex A added to Clause 3
• Deletion of distinction concerning boilers and pressure vessel applications (Clause 4)
• New definition of two classes and three subclasses added (Clause 5)
• Deletion of former Annex A