- Thanh ren Dai6c '
Ciic phrrdng phrip thrl co hgc
8.1 Th& keo
8.1.1 YGu cdu chung
Thuk6odugctiSnhinhddxicdinhgi6i hanchAy(hoacgidi hanchAyqui vdcA,2To\, gioi hanb€lnk6o,
d0 ddn dAi vir dO co thit ndu c6 y6u cAu.
8.1.2 QuY trinh thdr
Phep rhrl phAi duqc ti6n hAnh phir hgp v6i ISO 6892. CAc m6u th& phAi theo ti6u chudn thi6t tuong fng.
Ch0 thich - gd nh4n duo. c dQ co thit cdn phAi c6 mdu thrl v6i mit clt ngang hlnh trdn.
8.1.3 Chdp nh0n
C6c kdt quA thu dr-o,c phii phtr hgp vdi cAc ydu cdu c0a tiOu chudn thi6t k6 tuung ung.
8.2 Tht udn
8.2.1 YOu cdu chunE
Thr] ucin dd x6c dinh ring li€u vit li6u crja chai thAnh phdm c6 phAi lA d6o trong Phqm vi ydu cAu c0a ti6u chudn thi6t kd tusng ung.
A.2.2 Quy trlnh thrl
Chai thir duqc ldm phing Eirla cAc canh dao, tao thinh g6c bao 60oC. B6n kinh l6n nhdt c0a c6c dao
udn phii ph0 hgp vdi cAc y6u cAu c0a mQt ti6u chudn thidt kd tuctng (mg, bAn kinh nAy phq thu6-c viro dQ b€Jn k6o cfla vAt li€u. Chidu dAi c0a canh dao kh6ng duoc nho hon chidu r6ng cria chai duoc ldm phing.
Cic m6u thrl phAi duqc udn lheo hudng cong c0a thAnh chai chung quanh m6t khu6n c6 duUng kinh
durcc quy dinh trong ti6u chudn thi6t kd tuung ung, cho d6n khi c6c m{t trong c0a mdu thr} cAch nhau
m6t khoing kh6ng l6n hon dtrdng kfnh c0a khudn.
8.2.3 Chdp nhin
MAu thr? khi udn khdng dugc ntrt ran.
k6
tF
6295 : 1997
8.3 Thr? lim phing
8.3.1 Y6u cdu chung
Phep tht? lirm phing duuc xem nhu mQt dang c0a phep thri udn, xem B.z. N6 cho thdy vAt ti€u tim chai
lir d6o trong pham vi y6u cdu cOa thigt ke tuong trng.