ASME B73.1M:2001 pdf free download

ASME B73.1:2001 pdf free download.SPECIFICATION FORHORIZONTAL END SUCTIONCENTRIFUGAL PUMPS FOR
CHEMICAL PROCESS.
4.11.3 Casing. swfting box. cover or seal chamhcr. and jackets shall be designed to withstand a hydmslatic test at 15 rimes the maximum design pressure for the panicular component and material of construction used (see para. 5.2.1).
4.1.2 Temperature Limits. Temperature liniita(ions shall be saed by the pump muanutacwrer. Pumps should bc available for temperatures up to 5001 26(rC) Jackcting and other modifications may he required to meet the operating temperature.
4.2 Flanges
Suction and discharge nozzles shall be flanged. flanges shall conform to ASME B16,5 or ASME B16,42 Class 150 standards except that marking requirements are not applicable and the maximum acceptable tolerance on parallelism of the back of the flange shall be 3 deg and bolt holes may he tapped where noted in Table 1. Through bolt holes are preferred. When tapped holes are supplied, they shall he noted on the outline drawing, As an option. Class 300 flanges in accordance with ASME H16.5 or ASME Bl6.42 may be offered subject to the mnanufacmurers casing pressure-tempera- Lure limitations. All pumps reganlkss of flange rating shall conform to the X and V dimensions shown in Table I.
4.3 Casing
4.3.1 Drain Connection Boss(es). Pump casing shall hase bossesI lo pruvi& for drain cunncctioa(s) in the lowest part of the casing. Boss size shall accommodate in. NPT mm. lkmss(es) shall be drilled and tapped when spccitied by customer.
4.32 Auxiliary Connection Boss(es). The suction and discharge nozzles shall have boss4es) for gage connections Boss size shall accommodate 1/4 in. NPT mm.. f2 in. NPT preferred. Bosstes) shall he drilled and tapped when specifIed by customer.
4.5.5 Running Clearances. Running clearancemust be sufficient to prevent internal rubbing contactwithin the design region (para.5.1.6) and is subjectedto the maximum allowable flange loads as specified inpara.5.1.2.
4.5.6 Gritical Speed. The first lateral critical speedof the rotating assembly shall be at least 120% of themaximum operating speed. A”dry critical speed”calculation (see HI 9.6.4) is adequate to verify compli-ance.HI 9.6.4 shall be used to calculate static deflectionsused for the critical speed calculation.
4.5.7 Fillets and Radii. All shaft shouldcr filletsand radii shall be made as large as practical and finishedto reduce additional stress risers.
4.6 Shaft Sealing
4.6.1 Design. Two basic types of sealing coversshall be offered,onc called a scal chamber and asecond called a stuffing box.The seal chamber isdesigned to accommodate mechanical seals only andcan be of several designs for various types of seals.The design includcs a separatc gland platc where re-quired.The stuffing box is designed for packing. butmay be able to accommodate mechanical seals as analternative. Figures 2 and 3 show some piping systemsthat can be used with the various seals shown in Fig.4.A separate universal cover adapter to accommodatceither a seal chamber or stuffing box is optional.4.6.2 Seal Chamber.The seal chamber can be acylindrical or a tapered design. The tapered bore sealchamber shall have a minimum of a 4 deg taper opentoward the pump impeller.