F11 Gate Valve, EN 1.7335 Gate Valve

1. Main characteristics of F11 (EN 1.7335) valves:

F11 is a low-alloy chromium-molybdenum heat-resistant steel, widely used in boilers, pressure vessels, and piping systems.

2. Main advantages of Freeman Valve's F11 valves:

2.1 Freeman Valve's F11 valves have good weldability and a wide heat treatment window:

F11 valves have low preheating requirements before welding and a wide tolerance for post-weld heat treatment temperature ranges;

2.2 Freeman Valve's F11 valves have sufficient strength at medium temperatures:

Under operating conditions of ≤480℃, F11 valves have creep and endurance strength sufficient for medium-temperature and medium-pressure steam conditions;

2.3 Freeman Valve's F11 valves have acceptable hydrogen resistance:

F11 valves can be used in hydrogen-rich environments with less stringent temperature and pressure requirements, suitable for medium- and low-temperature hydrogenation pipelines.

3. Precautions for using F11 valves:

3.1 The operating temperature of F11 valves should not exceed 480℃:

When the operating temperature exceeds 480℃, the creep strength of F11 valves will decrease rapidly.

3.2 The resistance to sulfidation and oxidation of F11 valves is generally low:

① The corrosion rate of F11 valves to high-temperature H₂S media is significantly higher than that of F22, and far worse than that of F5;

② The corrosion rate of F11 valves to high-temperature oxidizing media is lower than that of F22;

3.3 The upper limit of hydrogen corrosion resistance of F11 valves is lower than that of F22:

① Under high-pressure, high-temperature hydrogen-contaminated conditions, the risk of hydrogen-induced cracking of F11 valves is higher than that of F22;

② F11 valves cannot be used in harsh hydrogenation main process pipelines.

4. Key Application Areas of Freeman Valve's F11 Valves:

4.1 Freeman Valve's F11 valves are widely used in thermal power auxiliary steam systems. For example:

Bypasses, reheat cold sections, and auxiliary steam pipelines in subcritical units;

4.2 Freeman Valve's F11 valves are widely used in general high-temperature process pipelines in petrochemical plants. For example:

Heater outlets, fractionation systems, and secondary pipelines in reforming units with operating temperatures ≤480℃;

4.3 Freeman Valve's F11 valves are widely used in non-harsh hydrogenation conditions in oil refining. For example:

Auxiliary pipelines, venting, and heat exchange sub-lines in hydrogenation units;

4.4 Freeman Valve's F11 valves are widely used in medium-temperature and medium-pressure steam systems in chemical and coal chemical industries. For example:

Process steam systems with operating temperatures between 420-480℃.

5. F11 valves are not recommended for the following conditions:

① When the design temperature is >480℃, directly upgrade to F22 valves; do not force the use of F11 valves.

② For high-concentration H₂S sulfidation corrosion conditions, F11 valves are insufficiently corrosion-resistant; F5 valves should be selected first.

③ For critical high-temperature, high-pressure hydrogen-related core process pipelines, do not select F11 valves; select F22 valves instead.

5. Summary:

Choose F11 valves: Auxiliary systems with operating temperatures ≤480℃;

Choose F22 valves: Main steam systems and main hydrogenation process systems with operating temperatures between 480-540℃.

Design Standard of F11 Gate Valve:

Design Acc. to ASME B16.34 (ANSI Standard F11 Gate Valve);

Design Acc. to EN-12516-1/2 (EN Standard F11 Gate Valve, DIN Standard F11 Gate Valve).

Test Standard of F11 Gate Valve:

Test Acc. to API 598 (ANSI Standard F11 Gate Valve);

Test Acc. to EN 12266-1/2 (EN Standard F11 Gate Valve, DIN Standard F11 Gate Valve).

Surface Finishing of F11 Gate Valve:

All F11 Gate Valve surface is finely machined to achieve the required roughness and conforms to standard MSS SP-110.

Size of F11 Gate Valve:

From DN1/4’’ to 48’’ (ANSI Standard F11 Gate Valve);

From DN8 to DN1200 (EN Standard F11 Gate Valve, DIN Standard F11 Gate Valve).

Face to Face of F11 Gate Valve:

Face to Face Acc. to ASME B16.10 (ANSI Standard F11 Gate Valve);

Face to Face Acc. to EN 558-1 (EN Standard F11 Gate Valve, DIN Standard F11 Gate Valve).

Pressure Rating of F11 Gate Valve:

ANSI Class 150 F11 Gate Valve (ANSI Standard F11 Gate Valve);

ANSI Class 300 F11 Gate Valve (ANSI Standard F11 Gate Valve);

ANSI Class 600 F11 Gate Valve (ANSI Standard F11 Gate Valve);

ANSI Class 800 F11 Gate Valve (ANSI Standard F11 Gate Valve);

ANSI Class 900 F11 Gate Valve (ANSI Standard F11 Gate Valve);

ANSI Class 1500 F11 Gate Valve (ANSI Standard F11 Gate Valve);

ANSI Class 2500 F11 Gate Valve (ANSI Standard F11 Gate Valve);

EN 1092 PN 16 F11 Gate Valve (EN Standard F11 Gate Valve, DIN Standard F11 Gate Valve);

EN 1092 PN 25 F11 Gate Valve (EN Standard F11 Gate Valve, DIN Standard F11 Gate Valve);

EN 1092 PN 40 F11 Gate Valve (EN Standard F11 Gate Valve, DIN Standard F11 Gate Valve);

EN 1092 PN 63 F11 Gate Valve (EN Standard F11 Gate Valve, DIN Standard F11 Gate Valve);

EN 1092 PN 100 F11 Gate Valve (EN Standard F11 Gate Valve, DIN Standard F11 Gate Valve);

EN 1092 PN 160 F11 Gate Valve (EN Standard F11 Gate Valve, DIN Standard F11 Gate Valve);

EN 1092 PN 250 F11 Gate Valve (EN Standard F11 Gate Valve, DIN Standard F11 Gate Valve);

EN 1092 PN 320 F11 Gate Valve (EN Standard F11 Gate Valve, DIN Standard F11 Gate Valve);

EN 1092 PN 400 F11 Gate Valve (EN Standard F11 Gate Valve, DIN Standard F11 Gate Valve).

Working Temperature of F11 Gate Valve:

Please refer to the "Temperature and Pressure Curve of F11 Gate Valve" for temperature and pressure changes.

Ends Connection of F11 Gate Valve:

ANSI Flange Ends F11 Gate Valve;

ANSI Integral Flange Ends F11 Gate Valve;

ANSI Welded Flange Ends F11 Gate Valve;

Butt Weld (ASME B16.25) Ends F11 Gate Valve;

Butt Weld x ANSI Flange Ends F11 Gate Valve;

EN 1092 Flange Ends F11 Gate Valve;

EN 1092 Integral Flange Ends F11 Gate Valve;

EN 1092 Welded Flange Ends F11 Gate Valve;

Butt Weld (EN 12627) Ends F11 Gate Valve;

Butt Weld (ISO 1127) Ends F11 Gate Valve;

Butt Weld x EN 1092 Flange Ends F11 Gate Valve;

Male NPT (ASME B1.20.1) Ends F11 Gate Valve;

Male BSPP (ISO 228-1) Ends F11 Gate Valve;

Male BSPT (ISO 7-1) Ends F11 Gate Valve;

Male NPT x Female NPT Ends F11 Gate Valve;

Male BSPP x Female BSPP Ends F11 Gate Valve;

Male BSPT x Female BSPT Ends F11 Gate Valve;

Male NPT x Long Butt Weld (+100 mm) Ends F11 Gate Valve;

Male BSPP x Long Butt Weld (+100 mm) Ends F11 Gate Valve;

Male BSPT x Long Butt Weld (+100 mm) Ends F11 Gate Valve;

Female NPT (ASME B1.20.1) Ends F11 Gate Valve;

Female BSPP (ISO 228-1) Ends F11 Gate Valve;

Female BSPT (ISO 7-1) Ends F11 Gate Valve;

Socket Weld (ASME B16.11) Ends F11 Gate Valve;

Socket Weld (EN 12760) Ends F11 Gate Valve;

Female NPT x Socket Weld Ends F11 Gate Valve;

Female BSPP x Socket Weld Ends F11 Gate Valve;

Female BSPT x Socket Weld Ends F11 Gate Valve;

Butt Weld (ASME B16.25) Ends F11 Gate Valve;

Butt Weld (EN 12627) Ends F11 Gate Valve;

Female NPT x Butt Weld Ends F11 Gate Valve;

Female BSPP x Butt Weld Ends F11 Gate Valve;

Female BSPT x Butt Weld Ends F11 Gate Valve;

Female NPT x Long Butt Weld (+100 mm) Ends F11 Gate Valve;

Female BSPP x Long Butt Weld (+100 mm) Ends F11 Gate Valve;

Female BSPT x Long Butt Weld (+100 mm) Ends F11 Gate Valve;

Long Butt Weld (+100 mm Weld Stub) Ends F11 Gate Valve.

CE Marking of F11 Gate Valve:

CE Marking is Available to F11 Gate Valve with a Diameter of DN32 or Larger.

Chemical Composition of F11 Gate Valve:

For the Chemical Composition of F11 Gate Valve, please refer to EN 10204 Type 3.1 certificate.

Mechanical Properties of F11 Gate Valve:

For the Mechanical Properties of F11 Gate Valve, please refer to EN 10204 Type 3.1 certificate.

Certificate of F11 Gate Valve:

All F11 Gate Valve will be delivered with EN 10204 Type 3.1 Certificate.

Approvals of F11 Gate Valve:

MSS SP-110 Certified of F11 Gate Valve;

NACE MR 0175 Certified of F11 Gate Valve

API 607 Fire Safe Certified of F11 Gate Valve;

ISO 9001 Certified of F11 Gate Valve;

PED Certified of F11 Gate Valve.

Available Upon Request of F11 Gate Valve:

NACE MR0175 is available upon request of F11 Gate Valve;

ATEX is available upon request of F11 Gate Valve;

TA-LUFT is available upon request of F11 Gate Valve;

SIL is available upon request of F11 Gate Valve;

Degreasing is available upon request of F11 Gate Valve;

Fire Safe is available upon request of F11 Gate Valve;

Stem Extension is available upon request of F11 Gate Valve;

Double Block and Bleed is available upon request of F11 Gate Valve.