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AED 오링

ED(Explosive Decompression) 혹은 RGD(Rapid Gas Decompres-
sion)는 고압의 개스가 급격하게 감압 될 때(폭발성 감압)
고무탄성체에서 나타나는 현상 으로써 (Failure -mechanism of
elastomers), 고압의 개스에 장시간 노출되었을때 고무탄성체내
에 침투되어 작은 버블형태로 용해되어 있던 기체가, 급격한
감압으로, 외부로 분출 팽창하면서(옆의 그림과 같이)오링과
같은 고무탄성체의 표면이 갈라지고 파열되는 현상을 말한다
(Seal Failure).
EnDura는 이러한 ED환경에 적응할수있도록 영국 PPE
에서 개발된 AED 오링으로써, 극한의 환경(Extreme envir-
onments)에 사용되는 만큼, 아래와 같은 여러 시험조건에서
반드시 검증을 거쳐야 되는 (Test Certified), 고신뢰성을 요하는
제품입니다.
International AED Test Standards :
AED O-RINGS_PPE ED(RGD) resistant grades :
ED resitant Description Operationg
Temperature		 NORSOK TOTAL NACE MCC
RGD-01
Grade M710
7.3 RGD		 PW 142
03/01		 ED
TM0297		 H2S
TM0187
EnDura V91J VITON Terpolymer, FKM -17℃~+225℃
EnDura V91A VITON Terpolymer, FKM -46℃~+225℃
EnDura V91K VITON Terpolymer, FKM -35℃~+225℃
EnDura A90H AFLAS, FEPM ( TFE/Pro) -0℃~+250℃
EnDura Z95X HNBR, Med ACN -25℃~+180℃
EnDura Z85L HNBR, Low ACN -50℃~+160℃
EnDura G92E Perlast, FFKM -15℃~+260℃
EnDura G90LT Perlast ICE, FFKM -46℃~+240℃
EnDura range of elite materials has been specifcal-
ly developed for use in downhole, surface and subsea
oilfield equipment and offers excellent explosive
decompression (ED) resistance. The range includes
unique material grades that provide the ultimate in
chemical resistance, mechanical properties and low
temperature performance.
Metal Seal과 SE Seals (Spring Energized Seals)에서는
일반 탄성체오링과 같은 ED(RGD) 현상이 발생하지 않습니다.
  • Freudenberg Oil & Gas Technologies : GAZGUARDTM 453702 HNBR, 453713 HNBR LT, 453026 FKM, 453029 FKM LT
  • Oldrati : OLD EDNHP 90N, OLD EDG95N, OLD REXP490
  • James Walker : HNBR Elast-O-Lion 101,985, FKM FR25/90, FR58/90,FR68/90, Kalrez 0090
Both seal types are Double Acting, and
effective sealing solution for applications that are subjected to :
  • Extremes of pressure (bi-directional) and temperature (HP & HT)
  • Chemical Attack by Oilfield Media
  • Large extrusion clearances
  • Arduous mechanical conditions.
Spring Seals :
  • High modulus elastomer ( Including EnDura, Perlast) + steel or PEEK springs
  • Only used in static applications
T-Seals :
  • High modulus elastomer ( Including EnDura, Perlast) + Ptfe or PEEK Back-up
    Rings
  • Used in static and dynamic application
  • James Walker : Springsele, Teesele, P-Seal, FS Casing & Tubing Seal
  • Freudenberg Oil & Gas Technologies : FS Seals, UnitizedTM Seal, Engineered Bonded Seals
Typical Applications :
  • Down-hole
  • Surface equipment
  • Wellhead
  • Valves, high pressure pipelines and riser system
사용하시려는 오링의 용도가 다음 형식중에서 어느 것에 해당되는지요?