Centrifugal pumps for chemical applications

Horizontal single-stage end-suction overhung impeller centrifugal pumps (for chemical applications includes ISO 2858, ISO 3069, ISO 3661, ASMEIANSI B73.1 designs)

ANSI, the American National Standards Institute, has a philosophy more similar to DIN than ISO in that it specifies materials and mechanical seal options. B73.1 is a standard for single stage centrifugal pumps, with back pull-out, intended for chemical and corrosive duties.  The Standard specifies bareshaft pump dimensions, also installation dimensions for complete packages with motor and baseplate. The Standard does not specify hydraulic duties. Mechanical seal arrangements, with various piping plans, are detailed to cover most applications. Depending upon materials and cooling arrangements pumpsmust be suitable for at least 260 deg. C.

IEC vs NEMA enclosure

NEMA Standards Enclosures for Electrical Equipment (1000Volts maximum) comparison to IEC 60529 Degrees of Protection provided by Enclosure IP Classification designation (cannot be used to convert IEC classification designations to NEMA type numbers)

NEMA Enclosure Type Number              IEC Enclosure Classification
                       1                                                                 IP 10
                       2                                                                 IP 11
                       3                                                                 IP 54
                       3R                                                              IP 14
                       3S                                                               IP 54
                       4 and 4X                                                    IP 56
                       5                                                                 IP 52
                       6 and 6P                                                    IP 67
                       12 and 12K                                                IP 52
                       13                                                               I P 54"

API 610 Power rating for motor drives

Flange Standards

There are a variety of standards used in the design and selection of flanges. The
following codes and standards relate to pipe flanges:
ASME Codes and Standards:
B16.1 Cast Iron Flanges and Flanged Fittings
B16.5 Pipe Flanges and Flanged Fittings
B16.24 Bronze Flanges and Fittings–150 and 300 Classes
B16.42 Ductile Iron Pipe Flanges and Flanged Fittings–150 and 300 Classes
B16.47 Large Diameter Steel Flanges

API Std 674 Positive Displacement Pumps - Reciprocating

Covers the minimum requirements for reciprocating positive displacement pumps for use in petroleum, chemical, and gas industry services. Both direct-acting and power-frame types are included.

Pump Standard API 676

the minimum requirements for rotary positive displacement pumps for use in the petroleum, chemical, and gas industries. It provides a purchase specification to facilitate the manufacture and purchase of rotary positive displacement pumps.

API 610 pump designation

1. OH1
Foot mounted single stage overhung pumps

2. OH2
Centerline mounted single stage overhung pump

3. OH3
Vertical inline single stage overhung pumps with separated bearing brackets

4. OH4
Rigidly-coupled vertical inline single stage overhung pumps

5. OH5
Close coupled vertical inline single stage overhung pumps

6. OH6
High speed integral gear driven single stage overhung pumps

7. BB1
Axially split one and two stage betwen bearings pumps

8. BB2
Radially split one and two stage betwen bearings pumps

9. BB3
Axially split multistage betwen bearings pump

10. BB4
Single casing radially split multistage betwen bearing pumps

11. BB5
Double casing radially split multistage betwen bearings pumps

12.VS1
Wet pit, vertically suspended , single casing diffuser pumps with discharge through the column

13. VS2
Wet pit, vertically suspended , single casing volute pumps with discharge through the column

14. VS3
Wet pit, vertically suspended , single casing axial flow pumps with discharge through the column

15. VS4
Vertically suspended, single casing volute line shaft driven sump pump

16. VS5
Vertically suspended, cantilever sump pumps

17. VS6
Double casing diffuser vertically suspended pumps

18. VS7
Double casing volute vertically suspended pumps