FF/HH Certified Materials

Proprietary materials qualified to API-6A-FF/HH material classification 

Freudenberg Flow Technologies is a leader in elastomer and advanced thermoplastics materials technology, offering FF/HH materials qualified to API-6A 21st ed. F.1.13.5.2 and ISO 10423 F.1.11 standards. 

All FF/HH qualified materials are exposed to a chemically aggressive environment for more than 160 hours at the maximum specified temperature rating for the temperature classification being tested or the required maximum temperature of the seal application.

Product Description

A specific example of certified performance of our FF/HH compounds is the Gazguard® 728 compound, which has been certified to material class FF/HH per ISO 10423:2009 and ANSI/API Specification 6A 21st Ed. within gas mixtures of:

  • 10% H2S / 10% CH4 / 80% CO2
  • Jet Fuel A, #2 Diesel
  • 70/20/10 mix of heptane/cyclohexane/toluene

In addition, S Seals and FS Seals composed of Gazguard® 728 have achieved 10,000 psi PR2 Certification to ISO 10423 F1.11 in various sizes and temperature ranges.

Benefits:
  • Excellent resistance to chemical attack from oils and fuels
  • Enhanced mechanical properties and abrasion resistance
  • Excellent resistance to oxygen and ozone weathering, and explosive decompression damage

Technical Specifications

Available FF/HH Materials:

Petroleum Elastomer

Material

Hydrocarbon Liquid Phase

Temperature

Duration

85 HNBR 6100OGT

Water, #2 Diesel

250°F (121°C)

336 hours (14 days)

80 HNBR 731OGT

70/20/10 mix of heptane /cyclohexane /toluene

350°F (117°C)

168 hours (7 days)

90 HNBR 741OGT

70/20/10 mix of heptane /cyclohexane /toluene

350°F (117°C)

168 hours (7 days)

HNBR 775OGT

Water, #2 Diesel

350°F (117°C)

336 hours (14 days)

Gazguard HNBR 702

Water, #2 Diesel

250°F (121°C)

168 hours (7 days)

90 Gazguard LT 728OGT

Jet Fuel A. water

250°F (121°C)

160 hours

90 Gazguard LT 728OGT

Water, #2 Diesel

250°F (121°C)

168 hours (7 days)

90 Gazguard LT 728OGT

70/20/10 mix of heptane /cyclohexane /toluene

300°F (148.9°C)

168 hours (7 days)

90 FKM 030OGT

70/20/10 mix of heptane /cyclohexane /toluene

350°F (117°C)

336 hours (14 days)

90 FKM 0130OGT

70/20/10 mix of heptane /cyclohexane /toluene

350°F (117°C)

336 hours (14 days)

FFL has adopted acceptance criterion from ISO 23936-2

Change in properties:

Hardness: +10/-20 units Volume: +25%/-5% Tensile: +/-50% (tensile modulus, tensile strength, strain at break)

Visual: No dissolution, cracking, blistering or physical deformation permitted.

 

Advanced Thermoplastics

Material

Hydrocarbon Liquid Phase

Temperature

Duration

PEEK 4000

70/20/10 mix of heptane /cyclohexane /toluene

350°F (117°C)

336 hours (14 days)

PTFE 2000

70/20/10 mix of heptane /cyclohexane /toluene

350°F (117°C)

336 hours (14 days)

PTFE 1125

70/20/10 mix of heptane /cyclohexane /toluene

350°F (117°C)

336 hours (14 days)

PTFE 1742

70/20/10 mix of heptane /cyclohexane /toluene

350°F (117°C)

336 hours (14 days)

FFL has adopted acceptance criterion from NORSOK M710 / ISO 23936-1 for thermoplastic seals and gaskets

Change in properties:

Volume: +5%/-1% Tensile: +/-50% (tensile modulus, tensile strength, strain at break)

Visual: No dissolution, cracking, blistering or physical deformation permitted.

 

API-6A Material Classes:

Material Class

Hydrocarbon Liquid Phase a

Gas Phase

AA/BB

b

5% vol. fraction CO2/95% vol. fraction CH4

CC

b

80% vol. fraction CO2/95% vol. fraction CH4

DD/EE

b

10% vol. fraction H2S/5% vol. fraction CO2/85% vol. fraction CH4

FF/HH

b

10% vol. fraction H2S/80% vol. fraction CO2/10% vol. fraction CH4

a Water shall be added to the liquid phase

b Hydrocarbon liquid phase selected at the manufacturer's discretion may include, but not limited to, jet fuel, diesel, kerosene, etc.

 

API-6A Temperature Ratings:

Temperature Classification

Operating Range (°C)

Operating Range (°F)

Min

Max

Min

Max

K

-60

82

-75

180

L

-46

82

-50

180

N

-46

60

-50

140

P

-29

82

-20

180

S

-18

60

0

140

T

-18

82

0

180

U

-18

121

0

250

V

2

121

35

250

X*

-18

176

0

350

Y*

-18

343

0

650