Comparison of API 610 11th Edition and API 610 12th Edition

API 610 12th Ed – 4.2.2.8

BB1-A: Foot Mounted

BB1-B: Near Centerline Mounted

API 610 12th Ed – 5.3

1. In case of conflict between API 610 and the inquiry, then inquiry shall govern.

2. After purchase, the purchase order shall govern.

3. The requirements specific to a particular pump type in “Section 9 – Specific Type of Pump” conflict with any other section, the requirements of Section 9 of API 610 shall govern.

API 610 12th Ed – 6.1.1

API 610 12th Ed – 6.1.1

API 610 12th Ed – 6.1.1

API 610 12th Ed – 6.1.13

API 610 12th Ed – 6.1.16

API 610 12th Ed – 6.9.2.2

API 610 12th Ed – 6.3.12

API 610 12th Ed – 7.4

a. Drain rim surrounding the entire base plate

b. Drain pan surrounding the entire base plate.

c. Partial drain pan that covers the entire width of the baseplate. The temperature of 400 °F (200 °C) or higher.
2. Pumping liquid with a relative density of less than 0.7 at the specified pumping temperature;
3. Pumping liquid rated discharge pressure above 1450 psi g (10 MPa g, 100 bar g);

a. Flat deck plate

b. Sloped full deck plate

c. Sloped partial deck plate,

d. Open deck version

e. Non-grouted Baseplate

f. Non-grouted baseplate as in Item e) with a gimbal mount, three-point mount, anti-vibration mount (AVM) spring mount, or other types of mount.

Flat Deck Plate

Sloped Full Deck Plate

Sloped Partial Deck Plate

API 610 12th Ed – 7.4.6

API 610 12th Ed – 8.3.3.1

API 610 12th Ed – 8.3.3.4.1

1) Shutoff (no vibration data required),

2) Minimum continuous stable flow (beginning of allowable operating region),

3) Between 95 % and 99 % of rated flow,

4) Between rated flow and 105 % of rated flow,

5) Approximately the best efficiency flow (if rated flow is not within 5 % of best efficiency flowrate),

6) End of allowable operating region.

1) Shutoff (no vibration data required),

2) Flow point at minimum continuous stable flow (beginning of allowable operating region),

3) Flow point at approximately halfway between minimum continuous stable flow and minimum preferred operating flow,

4) Flow point at minimum preferred operating flow,

5) Flow point at approximately halfway between minimum preferred operating flow and rated flow,

6) Flow point between 95 % and 99 % of rated flow,

7) Flow point between rated flow and 105 % of rated flow,

8) Flow point at the end of preferred operating region,

9) Flow point at the end of allowable operating region if different from the end of the preferred operating region.

For units with BEP less than 50 GPM (11 m3/h), Point 3 and Point 5 are not required.

API 610 12th Ed – 8.3.3.4.2

P_rated  –  Rated power per stage in hp (or MW) with water;

D_imp – Rated impeller diameter in inches. (or m);

D_nozzle – Nominal outlet flange diameter in inches or m. For double-suction, single-stage pumps, D_nozzle is the inlet flange diameter.

API 610 12th Ed – 8.3.4.8

Overhung Pumps

Between Bearing Pump

The special-purpose centrifugal pump is one that meets one or more of the following criteria:

1. Operating in a severe and critical application

2. Prototype Design

3. High energy levels

The design of special-purpose pumps often requires more purchaser and vendor interface than normal pumps described in the body of API 610. The annexure list the recommended discussion points and reviews that are to be mutually agreed by the parties and reflected in the final purchase specification.

This annexure covers, the design of Impeller, Shaft, Diffuser or Volute, Shaft seals, Bearing type and bearing housing.