Page 566 - Subyek Teknik Mesin - Forsthoffers Best Practice Handbook for Rotating Machinery by William E Forsthoffer

The Post-Shipment Phase: Installation, Pre-Commissioning, Commissioning and Start-up Best Practices Best Practice 1 0.6

Table 10.6.2 Nozzle loadings (Courtesy of API)
Table B e Nozzle loadings (US units)
Note: Each value shown below indicates a range from minus that value to plus that value; for example 160 indicates a range from e160 to þ160.
Nominal size of flange (NPS)
Force/moment 2 3 4 6 8 10 12 14 16
Each top nozzle
FX 160 240 320 560 850 1200 1500 1600 1900
FY 130 200 260 460 700 1000 1200 1300 1500

FZ 200 300 400 700 1100 1500 1800 2000 2300
FR 290 430 570 1010 1560 2200 2600 2900 3300
Each side nozzle
FX 160 240 320 560 850 1200 1500 1600 1900
FY 200 300 400 700 1100 1500 1800 2000 2300
FZ 130 200 260 460 700 1000 1200 1300 1500
FR 290 430 570 1010 1560 2200 2600 2900 3300
Each end nozzle

FX 200 300 400 700 1100 1500 1800 2000 2300
FY 160 240 320 560 850 1200 1500 1600 1900
FZ 130 200 260 460 700 1000 1200 1300 1500
FR 290 430 570 1010 1560 2200 2600 2900 3300
Each nozzle
MX 340 700 980 1700 2600 3700 4500 4700 5400

MY 170 350 500 870 1300 1800 2200 2300 2700
MZ 260 530 740 1300 1900 2800 3400 3500 4000
MR 460 950 1330 2310 3500 5000 6100 6300 7200
Note 1: F [ force in pounds; M [ movement in foot pounds; R [ resultant. See Figures 10.6.11 and 10.6.12 for orientation of nozzle loads (X, Y and Z)
Note 2: Coordinate system has been changed from API Standard 610, 7th edition, convention to ISO 1503 convention.

- Pipe stress calculation error - Settling pipe support foundations
- Improper spring hanger selection - Cracked grout and/or foundation (concrete)
- Improper soil analysis assumptions - Locked spring supports
- Improper foundation design - Improperly installed new spring supports
- Shim corrosion under pipe supports
- Shim corrosion between equipment feet and baseplate
Fig 10.6.14 Possible causes for excessive pipe stress and/or soft - Shims vibrating loose under pipe supports
foot (design)
Fig 10.6.16 Possible root causes for excessive pipe stress and/or
soft foot (plant conditions)

- Using equipment as a ‘pipe support’ There have been numerous examples, especially in the
- Improper installation of fixed spring supports Middle East, of poorly prepared foundations and grouting.
- Poor foundation and/or grout preparation Careful attention must be paid to the quality of the water used,
- Poor foundation and/or grout pour
the type of grout and the method of grouting followed.
It is strongly recommended that an epoxy grout be used for
Fig 10.6.15 Possible causes for excessive pipe stress and/or soft all rotating equipment and a grouting procedure, approved by
foot (construction) a reputable epoxy grout manufacturer, be utilized.

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