Describes class II requirements for centrifugal pumps of back pull-out construction used in the chemical and petrochemical industries. Individual clauses can be applied in other industries. Includes design features concerned with installation, maintenance and safety. Covers references, definitions, design, materials, shop inspection and tests and preparation for despatch. Appendices describe centrifugal pump, peak displacement, external forces and moments on flanges, seal arrangements and piping arrangements for seals. BS AMD 7527 RENUMBERS THIS STANDARD TO BS EN 25199