Friday, November 19, 2010

Hydrostatic Test

TUJUAN :
Untuk menguji kekuatan boiler dan fittings
FMA reg. 72
  Setiap boiler berikut mesti melakukan ujian HT:
1.  Boiler baru digunakan
2.  Setelah boiler repair. (eg. Repair crack by welding)
3.  Setiap tidak lebih 7 tahun
4.  Boiler yang tidak dapat diperiksa didalamnya kerana kecil
(tiada access)
5. Boiler yang diubah design. Untuk menentukan semula ASWP



SYARAT: 2 x ASWP (untuk boiler bertekanan<100 psi)
 1.5 x ASWP + 50 psi (untuk boiler bertekanan> 100 psi)


CONTOH : Boiler tekanan ASWP 10 bar
UJIAN   : (1.5 x 10 bar) + 3.4 bar = 18.4 bar (maksimum)
* 1 bar = 14.72 psi,   3.4 bar = 50 psi

Langkah2 HT

1.   Tutup dan blind setiap flange dan measuring instrument
2.   Gag atau blind Safety valves
3.   Isi air ke dalam boiler dan s/htr hingga penuh
    (air keluar ke vent line) – suhu air >= amb. Temp.
 4.Tutup vent valve
5. Teruskan pam air kedalam boiler menggunakan
    high pressure pump
6. Naikkan tekanan boiler secara berperingkat
7. Periksa sekiranya ada kebocoran
8. Sekiranya terdapat kebocoran dipertengahan ujian,
    release tekanan dan ketatkan ditempat kebocoran
9. Teruskan semula ujian setelah kebocoran diatasi
10.Pada 1.5% ASWP hendaklah bertahan selama 20
    minit dan tidak ada sebarang kebocoran
11.Kemudian turunkan tekanan secara berperingkat

9 comments:

  1. Terima kasih
    sedikit ilmu untuk sikongsi bersama.

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    Replies
    1. Kita Sahabatttt....untuk selamanya..

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  4. Is it 1.5 x ASWP or 1.5% of ASWP?

    ReplyDelete
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