310MoLN Check Valve
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310MoLN is a urea-grade all-austenitic stainless steel, an improved version of 310L. 310MoLN exhibits excellent resistance to high-pressure urea-urethane environments, excellent protection against pitting and crevice corrosion, and high mechanical strength.


1. Advantages of Freeman Valve's 310MoLN Valves


1.1 Freeman Valve's 310MoLN valves are the preferred choice for urea and urethane media.


The valve's "low-silicon + ultra-low-carbon" design effectively inhibits corrosion from urethane solutions; and it resists intergranular corrosion and erosion corrosion in urea media.


1.2 Freeman Valve's 310MoLN valves possess comprehensive resistance to wet corrosion.


This valve contains molybdenum and nitrogen, which work synergistically: nitrogen increases resistance to pitting corrosion initiation, while molybdenum inhibits the continued expansion of corrosion pits. The combined effect significantly improves resistance to pitting and crevice corrosion. Simultaneously, nitrogen acts as a lattice solid solution strengthener, increasing the material's yield strength.


1.3 Freeman Valve's 310MoLN valves exhibit excellent weldability, requiring no post-weld solution heat treatment.


The carbon content of 310MoLN valves is less than 0.03%, resulting in extremely low weld sensitization tendency.


1.4 Freeman Valve's 310MoLN valves demonstrate excellent overall high-temperature performance.


The high Cr and Ni content of 310MoLN valves gives them superior high-temperature oxidation resistance and creep strength compared to ordinary 316L valves; they can withstand both high-temperature vapor and liquid phase corrosion; and their short-term usable temperature range is close to 1100℃.


1.5 Freeman Valve's 310MoLN valves exhibit stable microstructure.


310MoLN valves, under standard solution treatment, have extremely low ferrite content, making them less prone to δ-ferrite-induced localized corrosion. Furthermore, the nitrogen content enhances yield strength and austenite stability.


1.6 Freeman Valve's 310MoLN valves exhibit excellent resistance to abrasion and erosion.


Therefore, these valves are ideally suited for applications involving media containing trace amounts of solid particles and high-speed flow corrosion.


2. Key Application Areas of Freeman Valve's 310MoLN Valves


2.1 Freeman Valve's 310MoLN valves are widely used in the urea fertilizer industry [core application areas]: for example, CO₂ stripping urea; high-pressure circulation systems in urea plants;


2.2 Freeman Valve's 310MoLN valves are widely used in petrochemical and coal chemical industries in corrosive environments: for example, high-temperature heat exchangers and reactor coils for chloride-containing acidic media; concentrated nitric acid plants, nitric acid recovery system equipment and pipelines; chloride-containing, acidic water stripping units;


2.3 Freeman Valve's 310MoLN valves are widely used in the energy and environmental protection fields: for example, high-temperature wet corrosion heat exchange elements in waste incineration and flue gas desulfurization (FGD); high-end heat exchangers in nuclear power and chemical industries (simultaneously facing high temperature + chloride ion);


2.4 Freeman... Valve's 310MoLN valves are widely used in specialty fine chemical industries, such as reactors for ammonia and ammoniation processes; and pipelines for high-temperature, pressurized organic acids and nitrogen-containing corrosive media.


3. Brief Selection Guide for Freeman Valve's 310MoLN Valves


3.1 Urea and ammonium carbamate high-pressure systems: 310MoLN valves are the preferred choice and are irreplaceable.


3.2 High-temperature gas-phase oxidation only, without strong liquid-phase corrosive media: The lower-cost 310S valve is sufficient.


3.3 Room temperature and medium temperature chlorinated freshwater media: 2205 and 2507 duplex stainless steels are recommended.


3.4 Strong reducing acid environments: 904L or nickel-based alloys are recommended.



Design Standard of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve):

Design Acc. to ASME B16.34 (ANSI Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

Design Acc. to EN-12516-1/2 (EN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), DIN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve)).

 

Test Standard of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve):

Test Acc. to API 598 (ANSI Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

Test Acc. to EN 12266-1/2 (EN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), DIN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve)).

 

Surface Finishing of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve):

All 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) surface is finely machined to achieve the required roughness and conforms to standard MSS SP-110.

 

Size of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve):

From DN1/4’’ to 48’’ (ANSI Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

From DN8 to DN1200 (EN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), DIN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve)).

 

Face to Face of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve):

Face to Face Acc. to ASME B16.10 (ANSI Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

Face to Face Acc. to EN 558-1 (EN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), DIN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve)).

 

Pressure Rating of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve):

ANSI Class 150 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (ANSI Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

ANSI Class 300 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (ANSI Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

ANSI Class 600 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (ANSI Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

ANSI Class 800 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (ANSI Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

ANSI Class 900 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (ANSI Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

ANSI Class 1500 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (ANSI Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

ANSI Class 2500 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (ANSI Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

EN 1092 PN 16 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (EN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), DIN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

EN 1092 PN 25 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (EN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), DIN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

EN 1092 PN 40 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (EN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), DIN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

EN 1092 PN 63 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (EN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), DIN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

EN 1092 PN 100 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (EN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), DIN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

EN 1092 PN 160 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (EN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), DIN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

EN 1092 PN 250 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (EN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), DIN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

EN 1092 PN 320 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (EN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), DIN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve));

EN 1092 PN 400 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) (EN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), DIN Standard 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve)).

 

Working Temperature of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve):

Please refer to the "Temperature and Pressure Curve of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve)" for temperature and pressure changes.

 

Ends Connection of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve):

ANSI Flange Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

ANSI Integral Flange Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

ANSI Welded Flange Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Butt Weld (ASME B16.25) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Butt Weld x ANSI Flange Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

EN 1092 Flange Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

EN 1092 Integral Flange Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

EN 1092 Welded Flange Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Butt Weld (EN 12627) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Butt Weld (ISO 1127) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Butt Weld x EN 1092 Flange Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Male NPT (ASME B1.20.1) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Male BSPP (ISO 228-1) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Male BSPT (ISO 7-1) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Male NPT x Female NPT Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Male BSPP x Female BSPP Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Male BSPT x Female BSPT Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Male NPT x Long Butt Weld (+100 mm) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Male BSPP x Long Butt Weld (+100 mm) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Male BSPT x Long Butt Weld (+100 mm) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Female NPT (ASME B1.20.1) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Female BSPP (ISO 228-1) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Female BSPT (ISO 7-1) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Socket Weld (ASME B16.11) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Socket Weld (EN 12760) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Female NPT x Socket Weld Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Female BSPP x Socket Weld Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Female BSPT x Socket Weld Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Butt Weld (ASME B16.25) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Butt Weld (EN 12627) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Female NPT x Butt Weld Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Female BSPP x Butt Weld Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Female BSPT x Butt Weld Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Female NPT x Long Butt Weld (+100 mm) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Female BSPP x Long Butt Weld (+100 mm) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Female BSPT x Long Butt Weld (+100 mm) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Long Butt Weld (+100 mm Weld Stub) Ends 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve).

 

CE Marking of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve):

CE Marking is Available to 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) with a Diameter of DN32 or Larger.

 

Chemical Composition of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve):

For the Chemical Composition of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), please refer to EN 10204 Type 3.1 certificate.

 

Mechanical Properties of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve):

For the Mechanical Properties of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve), please refer to EN 10204 Type 3.1 certificate.

 

Certificate of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve):

All 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve) will be delivered with EN 10204 Type 3.1 Certificate.

 

Approvals of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve):

MSS SP-110 Certified of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

NACE MR 0175 Certified of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve)

API 607 Fire Safe Certified of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

ISO 9001 Certified of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

PED Certified of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve).

 

Available Upon Request of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve):

NACE MR0175 is available upon request of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

ATEX is available upon request of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

TA-LUFT is available upon request of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

SIL is available upon request of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Degreasing is available upon request of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Fire Safe is available upon request of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Stem Extension is available upon request of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve);

Double Block and Bleed is available upon request of 310MoLN Swing Check Valve (UNS S31050 Swing Check Valve, EN 1.4466 Swing Check Valve).

 


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