What is ISO 28721-1 - Glasslined apparatus for process plants about?
ISO 28721-1 is the first part of the multi-series standard that is applicable to glasslined apparatus for process plants.
ISO 28721-1 specifies the quality requirements for apparatus, components, appliances and accessories of glass-lined steel (including semi-crystallized enamel coatings) and glass-lined steel castings used for process plants. It specifies the quality requirements and the tests to be carried out by the manufacturer as well as the actions to be taken to repair defects.
ISO 28721-1 is applicable to new apparatus and components as well as used items that have been re enamelled. It is also applicable to glass-lined pumps, pump components and fittings.
Note-
ISO 28721-1 does not apply to glass-lined flanged steel pipes or glass-lined flanged steel fittings.
ISO 28721-1 does not contain requirements regarding the chemical or physical properties of vitreous and porcelain enamels.
Who is ISO 28721-1 - Glasslined apparatus for process plants for?
ISO 28721-1 on glasslined apparatus for process plants is useful fo:
- Manufacturer of glass-lined apparatus for process plants
- Chemical industry
- Maintenance and repairer of glass lined apparatus
- Packaging and transport industry
- Testing laboratories
Why should you use ISO 28721-1 - Glasslined apparatus for process plants?
ISO 28721-1 provides you with different types of tests like visual examination, high-voltage test, testing for cracks, coating thickness measurement, measurement of dimensions which help you to cover checking the enamel, the dimensional accuracy, and the performance of apparatus and components.
ISO 28721-1 helps you in inspections and repairing defects.
What’s changed since the last update?
BS EN ISO 28721-1:2019 supersedes BS EN ISO 28721‑1:2011, which is withdrawn.
The main changes compared with the previous edition are as follows:
- The normative references have been updated
- The subclause for “high-voltage test” (5.3) has been revised
- The 7 kv test voltage for conductive or dissipative enamel according to 5.3 has been added to clause 10