904L is an ultra-low carbon, high-alloy austenitic stainless steel. The core advantage of 904L globe valves is their exceptional corrosion resistance in harsh environments such as dilute sulfuric acid and chloride-containing media, and their ease of machining and welding.
① Freeman Valve's 904L globe valves have high molybdenum (Mo: 4~5%) and copper (Cu: 1~2%) content, significantly improving their resistance to reducing acids (such as sulfuric acid and phosphoric acid) and halides (such as chloride ions);
② Freeman Valve's 904L globe valves perform excellently in media such as dilute sulfuric acid, boiling phosphoric acid, and organic acids, exhibiting outstanding resistance to pitting and crevice corrosion.
Freeman Valve's 904L globe valves are suitable for environments containing chloride ions (such as seawater and chloride solutions), exhibiting superior resistance to stress corrosion cracking compared to conventional austenitic stainless steels.
Freeman Valve's 904L globe valves maintain stability at high temperatures and can withstand short-term environments up to approximately 400°C.
In strong oxidizing acids such as nitric acid, 904L globe valves actually have lower corrosion resistance than 304L or 316L valves with lower molybdenum content.
Improper welding or heat treatment of 904L globe valves can easily lead to carbide precipitation, requiring solution treatment (rapid cooling at 1100~1150°C) to restore performance.
For example: dilute sulfuric acid storage tanks, pipelines, heat exchangers (especially for sulfuric acid with a concentration ≤10%, exhibiting excellent corrosion resistance at temperatures ≤40℃).
For example: seawater cooling systems, salt chemical evaporators, chlorination reactor linings.
For example: acetic acid and formic acid production equipment, preventing localized corrosion.
For example: flue gas desulfurization (FGD) system components, acidic wastewater treatment equipment.
For example: crystallizers and condensers used in high-temperature acetic acid media.
For example: reaction vessels and pipelines for high-purity pharmaceuticals (resistant to cleaning agent corrosion).
① The pitting equivalent value (PREN≈33-35) of the 2205 globe valves is higher than that of the 904L globe valves (PREN≈32-34), and the nitrogen content further enhances its resistance to pitting corrosion in high-concentration, high-temperature chloride ion environments (such as high-chlorinated brine in deep well oil production and seawater above 60℃).
② The high nickel + copper content of the 904L globe valves results in a passivation film with significantly greater stability than that of the 2205 globe valves in reducing media containing chloride (such as dilute sulfuric acid + chloride ion mixtures), without exhibiting the phase imbalance problem common in duplex steels.
① Stress corrosion cracking under chloride ion conditions is a common failure mode for 2205 globe valves, but the high nickel content of 904L globe valves significantly reduces this susceptibility. 2205 globe valves also exhibit better SCC resistance than ordinary austenitic steels such as 316L globe valves, but under the same chloride ion concentration and stress conditions, their long-term stability is slightly lower than that of 904L globe valves.
① 904L globe valves require no heat treatment after welding and have good low-temperature toughness, making them suitable for polar and marine environments.
② 2205 globe valves require controlled heat input during welding to avoid excessive ferrite content, but their high strength (tensile strength ≥620MPa, more than 1.2 times that of 904L globe valves) makes them more suitable for high-pressure + high-chlorine composite operating conditions (such as high-pressure seawater pipelines).
Design Standard of 904L Globe Valve:
Design Acc. to ASME B16.34 (ANSI Standard 904L Globe Valve);
Design Acc. to EN-12516-1/2 (EN Standard 904L Globe Valve, DIN Standard 904L Globe Valve).
Test Standard of 904L Globe Valve:
Test Acc. to API 598 (ANSI Standard 904L Globe Valve);
Test Acc. to EN 12266-1/2 (EN Standard 904L Globe Valve, DIN Standard 904L Globe Valve).
Surface Finishing of 904L Globe Valve:
All 904L Globe Valve surface is finely machined to achieve the required roughness and conforms to standard MSS SP-110.
Size of 904L Globe Valve:
From DN1/4’’ to 48’’ (ANSI Standard 904L Globe Valve);
From DN8 to DN1200 (EN Standard 904L Globe Valve, DIN Standard 904L Globe Valve).
Face to Face of 904L Globe Valve:
Face to Face Acc. to ASME B16.10 (ANSI Standard 904L Globe Valve);
Face to Face Acc. to EN 558-1 (EN Standard 904L Globe Valve, DIN Standard 904L Globe Valve).
Pressure Rating of 904L Globe Valve:
ANSI Class 150 904L Globe Valve (ANSI Standard 904L Globe Valve);
ANSI Class 300 904L Globe Valve (ANSI Standard 904L Globe Valve);
ANSI Class 600 904L Globe Valve (ANSI Standard 904L Globe Valve);
ANSI Class 800 904L Globe Valve (ANSI Standard 904L Globe Valve);
ANSI Class 900 904L Globe Valve (ANSI Standard 904L Globe Valve);
ANSI Class 1500 904L Globe Valve (ANSI Standard 904L Globe Valve);
ANSI Class 2500 904L Globe Valve (ANSI Standard 904L Globe Valve);
EN 1092 PN 16 904L Globe Valve (EN Standard 904L Globe Valve, DIN Standard 904L Globe Valve);
EN 1092 PN 25 904L Globe Valve (EN Standard 904L Globe Valve, DIN Standard 904L Globe Valve);
EN 1092 PN 40 904L Globe Valve (EN Standard 904L Globe Valve, DIN Standard 904L Globe Valve);
EN 1092 PN 63 904L Globe Valve (EN Standard 904L Globe Valve, DIN Standard 904L Globe Valve);
EN 1092 PN 100 904L Globe Valve (EN Standard 904L Globe Valve, DIN Standard 904L Globe Valve);
EN 1092 PN 160 904L Globe Valve (EN Standard 904L Globe Valve, DIN Standard 904L Globe Valve);
EN 1092 PN 250 904L Globe Valve (EN Standard 904L Globe Valve, DIN Standard 904L Globe Valve);
EN 1092 PN 320 904L Globe Valve (EN Standard 904L Globe Valve, DIN Standard 904L Globe Valve);
EN 1092 PN 400 904L Globe Valve (EN Standard 904L Globe Valve, DIN Standard 904L Globe Valve).
Working Temperature of 904L Globe Valve:
Please refer to the "Temperature and Pressure Curve of 904L Globe Valve" for temperature and pressure changes.
Ends Connection of 904L Globe Valve:
ANSI Flange Ends 904L Globe Valve;
ANSI Integral Flange Ends 904L Globe Valve;
ANSI Welded Flange Ends 904L Globe Valve;
Butt Weld (ASME B16.25) Ends 904L Globe Valve;
Butt Weld x ANSI Flange Ends 904L Globe Valve;
EN 1092 Flange Ends 904L Globe Valve;
EN 1092 Integral Flange Ends 904L Globe Valve;
EN 1092 Welded Flange Ends 904L Globe Valve;
Butt Weld (EN 12627) Ends 904L Globe Valve;
Butt Weld (ISO 1127) Ends 904L Globe Valve;
Butt Weld x EN 1092 Flange Ends 904L Globe Valve;
Male NPT (ASME B1.20.1) Ends 904L Globe Valve;
Male BSPP (ISO 228-1) Ends 904L Globe Valve;
Male BSPT (ISO 7-1) Ends 904L Globe Valve;
Male NPT x Female NPT Ends 904L Globe Valve;
Male BSPP x Female BSPP Ends 904L Globe Valve;
Male BSPT x Female BSPT Ends 904L Globe Valve;
Male NPT x Long Butt Weld (+100 mm) Ends 904L Globe Valve;
Male BSPP x Long Butt Weld (+100 mm) Ends 904L Globe Valve;
Male BSPT x Long Butt Weld (+100 mm) Ends 904L Globe Valve;
Female NPT (ASME B1.20.1) Ends 904L Globe Valve;
Female BSPP (ISO 228-1) Ends 904L Globe Valve;
Female BSPT (ISO 7-1) Ends 904L Globe Valve;
Socket Weld (ASME B16.11) Ends 904L Globe Valve;
Socket Weld (EN 12760) Ends 904L Globe Valve;
Female NPT x Socket Weld Ends 904L Globe Valve;
Female BSPP x Socket Weld Ends 904L Globe Valve;
Female BSPT x Socket Weld Ends 904L Globe Valve;
Butt Weld (ASME B16.25) Ends 904L Globe Valve;
Butt Weld (EN 12627) Ends 904L Globe Valve;
Female NPT x Butt Weld Ends 904L Globe Valve;
Female BSPP x Butt Weld Ends 904L Globe Valve;
Female BSPT x Butt Weld Ends 904L Globe Valve;
Female NPT x Long Butt Weld (+100 mm) Ends 904L Globe Valve;
Female BSPP x Long Butt Weld (+100 mm) Ends 904L Globe Valve;
Female BSPT x Long Butt Weld (+100 mm) Ends 904L Globe Valve;
Long Butt Weld (+100 mm Weld Stub) Ends 904L Globe Valve.
CE Marking of 904L Globe Valve:
CE Marking is Available to 904L Globe Valve with a Diameter of DN32 or Larger.
Chemical Composition of 904L Globe Valve:
For the Chemical Composition of 904L Globe Valve, please refer to EN 10204 Type 3.1 certificate.
Mechanical Properties of 904L Globe Valve:
For the Mechanical Properties of 904L Globe Valve, please refer to EN 10204 Type 3.1 certificate.
Certificate of 904L Globe Valve:
All 904L Globe Valve will be delivered with EN 10204 Type 3.1 Certificate.
Approvals of 904L Globe Valve:
MSS SP-110 Certified of 904L Globe Valve;
NACE MR 0175 Certified of 904L Globe Valve
API 607 Fire Safe Certified of 904L Globe Valve;
ISO 9001 Certified of 904L Globe Valve;
PED Certified of 904L Globe Valve.
Available Upon Request of 904L Globe Valve:
NACE MR0175 is available upon request of 904L Globe Valve;
ATEX is available upon request of 904L Globe Valve;
TA-LUFT is available upon request of 904L Globe Valve;
SIL is available upon request of 904L Globe Valve;
Degreasing is available upon request of 904L Globe Valve;
Fire Safe is available upon request of 904L Globe Valve;
Stem Extension is available upon request of 904L Globe Valve;
Double Block and Bleed is available upon request of 904L Globe Valve.
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