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Download e-book for kindle: Centrifugal Pumps for Petroleum, Petrochemical and Natural by ISO/TC 67/SC 6

By ISO/TC 67/SC 6

ISO 13709:2003 specifies specifications for centrifugal pumps, together with pumps operating in opposite as hydraulic energy restoration generators, to be used in petroleum, petrochemical and gasoline technique providers. ISO 13709:2003 is appropriate to overhung pumps, between-bearings pumps and vertically-suspended pumps. Clause eight offers specifications acceptable to precise different types of pump. All different clauses of ISO 13709:2003 are acceptable to all pump forms. Illustrations are supplied of many of the particular pump forms and the designations assigned to every particular variety. ISO 13709:2003 isn't really appropriate to sealless pumps.

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Additional info for Centrifugal Pumps for Petroleum, Petrochemical and Natural Gas Industries

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In general, the change in vibration increases with increasing energy density, higher specific speed, and higher suction-specific speed. With these general characteristics, a centrifugal pump’s operating flow range can be divided into two regions, one termed the best efficiency or preferred operating region, over which the pump exhibits low vibration, the other termed the allowable operating region, with its limits defined as those capacities at which the pump’s vibration reaches a higher but still “acceptable” level.

4), clearances less than those given in Table 5 may be proposed by the vendor. Factors such as distortion and thermal gradients shall be considered, to ensure clearances are sufficient to provide dependability of operation and freedom from seizure under all specified operating conditions. 99 0,28 2,000 to 2,499 0,011 65 to 79,99 0,30 2,500 to 2,999 0,012 80 to 89,99 0,33 3,000 to 3,499 0,013 90 to 99,99 0,35 3,500 to 3,999 0,014 100 to 114,99 0,38 4,000 to 4,499 0,015 115 to 124,99 0,40 4,500 to 4,999 0,016 125 to 149,99 0,43 5,000 to 5,999 0,017 150 to 174,99 0,45 6,000 to 6,999 0,018 175 to 199,99 0,48 7,000 to 7,999 0,019 200 to 224,99 0,50 8,000 to 8,999 0,020 225 to 249,99 0,53 9,000 to 9,999 0,021 250 to 274,99 0,55 10,000 to 10,999 0,022 275 to 299,99 0,58 11,000 to 11,999 0,023 300 to 324,99 0,60 12,000 to 12,999 0,024 325 to 349,99 0,63 13,000 to 13,999 0,025 350 to 374,99 0,65 14,000 to 14,999 0,026 375 to 399,99 0,68 15,000 to 15,999 0,027 400 to 424,99 0,70 16,000 to 16,999 0,028 425 to 449,99 0,73 17,000 to 17,999 0,029 450 to 474,99 0,75 18,000 to 18,999 0,030 475 to 499,99 0,78 19,000 to 19,999 0,031 500 to 524,99 0,80 20,000 to 20,999 0,032 525 to 549,99 0,83 21,000 to 21,999 0,033 550 to 574,99 0,85 22,000 to 22,999 0,034 575 to 599,99 0,88 23,000 to 23,999 0,035 600 to 624,99 0,90 24,000 to 24,999 0,036 625 to 649,99 0,95 25,000 to 25,999 0,037 NOTE For diameters greater than 649,99 mm (25,999 in), the minimum diametral clearances shall be 0,95 mm (0,037 in) plus 1 µm for each additional 1 mm of diameter or fraction thereof (0,001 in for each additional 1 in).

This shaft deflection limit may be achieved by a combination of shaft diameter, shaft span or overhang, and casing design (including the use of dual volutes or diffusers). For one- and two-stage pumps, no credit shall be taken for the fluid stiffening effects of impeller wear rings. For multistage pumps, fluid stiffening effects shall be considered and calculations shall be performed at both one and two times the nominal design clearances. The fluid stiffness of product-lubricated bearings and bearing bushings shall be calculated at both one and two times the nominal design clearances.

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Centrifugal Pumps for Petroleum, Petrochemical and Natural Gas Industries by ISO/TC 67/SC 6


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