NBN EN 25199 : 1993

National foreword
Committees responsible
Specification
0. Introduction
1. Scope and field of application
2. References
3. Definitions
4. Design
5. Materials
6. Shop inspection and tests
7. Preparation for despatch
Annexes
A. Centrifugal pump - Data sheet
B. Peak displacement
C. External forces and moments on flanges
D. Typical seal arrangements
E. Piping arrangements for seals
F. Enquiry, proposal, purchase order
G. Documentation after purchase order
H. Check list
Table
1. Limits of vibration severity for horizontal pumps
     with multivane impellers
Figures
1. Prime mover output, percentage of pump power input
     at rated conditions
2. Simple amplitude, A, as a function of speed of
     rotation for various r.m.s.-frequency values
3. Curve I - Vertical forces (cast steel pumps)
4. Curve II - Horizontal forces (cast steel pumps)
5. Curve III - Total moment (cast steel pumps)

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 describes centrifugal pump, peak displacement, external forces and moments on flanges, seal arrangements and piping arrangements for seals.