ASME B16.5 Flange Toleranices

1. General

Rau lub hom phiaj ntawm kev txiav txim siab ua raws li Tus Qauv no, lub rooj sib tham rau kev kho cov lej tseem ceeb ntawm qhov chaw txwv, qhov siab tshaj plaws lossis qhov tsawg kawg nkaus, tau teev tseg yuav tsum muab sib npaug raws li tau hais tseg hauv ASTM Practice E29. Qhov no xav kom ib qho kev soj ntsuam los yog xam tus nqi yuav tsum tau muab sib npaug rau tom qab qhov ze tshaj plaws nyob rau hauv lub xeem txoj cai-handdigitused rau expres hu nkauj qhov txwv. Cov npe ntawm cov lej tolerances tsis hais txog ib qho kev ntsuas tshwj xeeb.

2.Center-to-Contact Surfaces thiab Center-to-End

Tolerances Yuav tsum tau kam rau ua rau ntau yam flanges thiab flanged haum ntsiab yog raws li nram no:

(a) Center-to-Contact Surfaces Lwm yam tshaj li lub nplhaib sib koom

Kev kam rau siab, mm (hauv.)

NPS Tsawg dua lossis sib npaug rau 10 ± 1.0 (± 0.04)

NPS Ntau dua lossis sib npaug ntawm 12 ± 1.5 (±0.06)

(b) Center-to-End (Ring Joint) Loj

Kev kam rau siab, mm (hauv.)

NPS Tsawg dua lossis sib npaug rau 10 ± 1.0 (± 0.04)

NPS Ntau dua lossis sib npaug ntawm 12 ± 1.5 (±0.06)

Kev kam rau siab, mm (hauv.)

NPS Tsawg dua lossis sib npaug rau 10 ± 2.0 (± 0.08)

NPS Ntau dua lossis sib npaug rau 12 ± 3.0 (±0.12)

(d) End-to-End (Nplhaib Joint) Loj

Kev kam rau siab, mm (hauv.)

NPS Tsawg dua lossis sib npaug rau 10 ± 2.0 (± 0.08)

NPS Ntau dua lossis sib npaug rau 12 ± 3.0 (±0.12)

3. Cov ntsej muag

Tolerances uas siv rau ob qho tib si flange thiab flanged fittings yog raws li nram no:

(a) Sab hauv thiab sab nraud ntawm tus nplaig loj thiab me thiab zawj thiab poj niam, ±{{0}}.5 hli (± 0.02 nyob rau hauv.).

(b) Sab nraud txoj kab uas hla, 1.5 hli (0 06 nyob rau hauv.) tsa ntsej muag, ± 1.0 hli (± 0.04 nyob rau hauv.).

(d) Nplhaib sib koom ua ke groove tolerances muaj nyob rau hauv Table 5 (Table 5C).

Tolerances uas siv rau flanges yog raws li nram no:

(e) Perpendicularity ntawm lub ntsej muag nrog lub bore.

Size kam rau ua, deg

NPS Tsawg dua lossis sib npaug rau 5 1

NPS Ntau dua lossis sib npaug rau 6 0.5

4.Flange Thickness

Yuav tsum tau tolerances rau flange thickness yog raws li nram no:

Size kam rau ua, mm (hauv.)

NPS Tsawg dua lossis sib npaug rau 18 ntxiv 3.0, −0.0 (ntxiv rau 0.12, −0.00 )

NPS ntau dua lossis sib npaug rau 20 ntxiv rau 5.0, −0.0 (ntxiv rau 0.20, −0.{{8} })

Qhov kev kam rau siab ntxiv yog siv tau rau bolting bearing nto seb puas yog forged, as-cam khwb cia, ntsej muag, lossis nraub qaum (saib para. 6.6).

5.Welding End Flange Xaus thiab Hubs

5.1 Sab nraud txoj kab uas hla.

Yuav tsum kam rau siab rau lub nominal sab nraud txoj kab uas hla dimension A ntawm daim duab 7 thiab 8 ntawm vuam kawg ntawm vuam caj dab flanges yog raws li nram no:

Size kam rau ua, mm (hauv.)

NPS Tsawg dua lossis sib npaug rau 5 ntxiv 2.0, −1.0 (ntxiv rau 0.08, −0.04)

NPS Ntau dua lossis sib npaug rau 6 ntxiv rau 4.0, −1.0 (ntxiv rau 0.16, −0.04)

5.2 Sab hauv Dia.

Yuav tsum tau kam rau siab rau lub nominal nyob rau hauv txoj kab uas hla ntawm vuam xaus ntawm vuam caj dab flanges thiab me me bore ntawm lub qhov (socket) vuam flanges (qhov ntev B nyob rau hauv cov ntaub ntawv hais txog) yog raws li nram no:

(a) Rau Daim duab 4, 7, thiab 8, qhov kam rau ua yog

Size kam rau ua, mm (hauv.)

NPS Tsawg dua lossis sib npaug rau 10 ± 1.0 (± 0.04)

12 Tsawg dua lossis sib npaug NPS Tsawg dua lossis sib npaug ntawm 18 ± 1.5 (±0.06)

NPS Ntau dua lossis sib npaug rau 20 ntxiv rau 3.0, −1.5 (ntxiv 0.12, −0.06)

(b) Rau Daim duab 9, qhov kam rau ua yog

Size kam rau ua, mm (hauv.)

NPS Tsawg dua lossis sib npaug rau 10 ntxiv rau 0.0, −1.0 (ntxiv rau 0.0, −0.04)

NPS Ntau dua lossis sib npaug rau 12 ntxiv rau 0.0, −1.5 (ntxiv rau 0.0, −0.06)

5.3 Backing Ring Contact Surface.

Yuav tsum muaj kev kam rau siab rau lub bore ntawm lub nplhaib rov qab hu rau ntawm vuam caj dab flanges, qhov ntev C ntawm daim duab 9 thiab 10 yog raws li nram no:

Size kam rau ua, mm (hauv.)

2 Less tshaj los yog sib npaug rau NPS Tsawg dua los yog sib npaug rau 24 ntxiv rau 0.25, −0.0 (ntxiv rau 0.01, − 0.0)

5.4 Hub Thickness.

Txawm hais tias qhov kam rau ua tau teev tseg rau qhov ntev A thiab B, lub thickness ntawm lub hub ntawm vuam kawg yuav tsum tsis txhob tsawg tshaj li 871 ∕2 feem pua ntawm cov nominal thickness ntawm cov yeeb nkab, muaj ib tug under-tolerance ntawm 12.5 feem pua rau cov yeeb nkab phab ntsa thickness. uas lub flange yuav tsum tau txuas los yog qhov tsawg kawg nkaus phab ntsa thickness raws li teev los ntawm tus neeg yuav khoom.

6.Length Los ntawm Hub ntawm Vuam Neck Flanges

Qhov yuav tsum tau tolerances rau qhov ntev los ntawm hubs ntawm vuam caj dab flanges yog raws li nram no:

Size kam rau ua, mm (hauv.)

NPS Tsawg dua lossis sib npaug 4 ± 1.5 (±0.06)

5 Tsawg dua lossis sib npaug NPS Tsawg dua lossis sib npaug rau 10 ntxiv rau 1.5, −3.0 (ntxiv rau 0.06, −0.12)

NPS Ntau dua lossis sib npaug rau 12 ntxiv rau 3.0, −5.0 (ntxiv rau 0.12, −0.20)

7.Flange Bore Diameter

7.1 Lapped thiab Slip-On Flange Bores.

Qhov yuav tsum tau kam rau ua rau lapped thiab slip-on flange bore diameters yog raws li nram no:

Size kam rau ua, mm (hauv.)

NPS Tsawg dua lossis sib npaug rau 10 ntxiv rau 1.0, −0.0 ( ntxiv rau 0.04, −0.0 )

NPS Ntau dua lossis sib npaug rau 12 ntxiv rau 1.5, −0.

7.2 Counterbores, Threaded Flanges.

Qhov yuav tsum tau tolerances rau threaded flange counterbores yog raws li nram no:

Size kam rau ua, mm (hauv.)

NPS Tsawg dua lossis sib npaug rau 10 ntxiv rau 1.0, −0.0 ( ntxiv rau 0.04, −0.0 )

NPS Ntau dua lossis sib npaug rau 12 ntxiv rau 1.5, −0.

7.3 Counterbores, Qhov (socket) Vuam Flanges.

Qhov yuav tsum tau ua siab ntev rau lub qhov (socket) kawg counterbores yog raws li nram no:

Size kam rau ua, mm (hauv.)

1 ∕ 2 Tsawg dua lossis sib npaug NPS Tsawg dua lossis sib npaug rau 3 ±0.25 (±0.010)

8. Drilling thiab Facing

8.1 Bolt Circle Diameter.

Qhov yuav tsum tau ua siab ntev rau tag nrho lub voj voog txoj kab uas hla yog raws li nram no: ± 1.5 hli (± 0.06 nyob rau hauv.)

8.2 Bolt Qhov rau Bolt Qhov.

Qhov yuav tsum tau ua siab ntev rau qhov nruab nrab-rau-nruab nrab ntawm cov qhov uas nyob ib sab yog raws li nram no: ±0.8 hli (±0.03 in.)

8.2 Bolt Circle Concentricity.

Qhov yuav tsum tau tolerances rau concentricity ntawm lub flange bolt lub voj voog txoj kab uas hla thiab tshuab tig diameters yog raws li nram no:

Size kam rau ua, mm (hauv.)

NPS Tsawg dua lossis sib npaug rau 21 ∕ 2 0.8 (0.03)

NPS Ntau dua lossis sib npaug rau {{0}}.5 (0.06)