Page 262 - Plumber- TT - 1st Year - Tamil

AhPYûQ
BS 21-þ1973 Utßm IS 2643þ1964
BSPûTl UûWLs/ ùY°®hPm/ þ AÝjRjûR ©WúVô¡lTRtÏ
TVuTÓ¡\Õ (Fig 8)
A[ÜLs AeÏXm ûTl þu
ApXÕ
DIN 2999
(EsTdLm B)
1/2" 14 20.955mm
3/4" 14 26.441
1" 11 33.249
11/4" 11 41.910
-þ Ah_vh ùNnYRtÏ TV]ô¡\Õ (Fig 9)
11/2" 11 47.803
2" 11 59.614
2 1/2" 8 75.184
3" 8 87.884
4" 8 113.030

UûWL°u TVu (Uses of threads) ûTl UûW«u TôLeLs (Parts of a pipe
thread) (Fig 10)
§ÚÏ UûWLs ¸r Es[ûYLÞdÏ
TVuTÓjRlTÓ¡u\].

-þ CûQ®lTô]ôL úRûY«u úTôÕ
Ju\ôL ©¥lTRtÏm Utßm ©¬lTRtÏm
ÕûQlùTôÚhL°p TVuTÓjRl
TÓ¡\Õ. (Fig 5)

-þ JÚ Ù²h¥XõÚkÕ Utù\ôÚ Ù²hÓdÏ
CVdLjûR UôtßYRtÏ/LPjÕYRtÏm
TVuTÓ¡\Õ. (Fig 6) Ef£ (crest): UûW/׬Vu CÚ TdLeL°u
úUtTWl©p CûQ¡\Õ.
ìh (Root): AÓjÕs[ TdLeLs ¸r TWl©p
CûQÙm UûW
©[ôed (Flank): ¡WvûPÙm ìhûPÙm
CûQdÏm TWl×
UûW«u úLôQm (Thread angle: AÓjÕs
UûW ©XôeLvLÞdÏ CûPúV Es[
þ §hP Öi¦V A[®û] A[lTRtÏ
TV]ô¡\Õ. (Fig 7) AûPúLôQm (included angle)
BZm (depth): Uû\«u/׬Vu ìh Utßm
¡WvhdÏ CûPúV Es[ ùNeÏjÕ çWm
A§LThN ®hPm (Major diameter): ùY°×\
UûWL°p CÕ ©[ôe¡u ®hPUôÏm.
CRu ÁÕ UûW ùYhPlTÓ¡\Õ. B]ôp
Es UûWL°p úTôÕ CÕ UûW
ùYhPlThP ©\Ï Es[ A§LlThN
®hPm úU_ôó ®hPm Guß
A±VlTÓ¡\Õ. (Fig 10)
CkR ®hPj§-ÚkÕ vÏÚ UûWL°u
A[ÜLs ùLôÓdLlTÓ¡u\].
242 ©[m©e þ ©[mTo (NSQF - Revised 2022) - R.T. for Ex. 1.8.-73