Advantages, Precautions, Selection, and Applications of Freeman Valve ASTM A995 5A Wafer Type Swing Check Valve
ASTM A995 5A is a cast version of super duplex stainless steel (corresponding to 2507 forgings) defined by ASTM A995/A995M standards. It combines high strength with high corrosion resistance and is specifically designed for harsh corrosive environments such as those containing chlorine. Freeman Valve's wafer type swing check valve in this series fully utilize the material's properties to meet the stringent requirements of various industries.
1. Core Advantages of Freeman Valve's ASTM A995 Gr. 5A Wafer Type Swing Check Valve
Freeman Valve leverages its mature manufacturing processes to integrate the superior properties of ASTM A995 Gr. 5A material into its valve products. The core advantages are as follows:
1.1 Freeman Valve's ASTM A995 Gr. 5A wafer type swing check valve possesses exceptional resistance to pitting and crevice corrosion: The PREN (pitting equivalent) of ASTM A995 Gr. 5A wafer type swing check valve is >40, thanks to the high alloy ratio of 24-26% Cr, 4-5% Mo, and 0.2-0.3% N in the material. This allows for stable resistance to media with high chlorine concentrations exceeding 4% (such as seawater concentrate), and its corrosion resistance is far superior to 316L stainless steel and ordinary duplex stainless steel wafer type swing check valve.
1.2 Freeman Valve's ASTM A995 Gr. 5A wafer type swing check valve exhibit outstanding resistance to Cl⁻ stress corrosion cracking (SCC): Utilizing the material's inherent ferrite-austenite duplex structure and high nitrogen content, it effectively inhibits chloride ion-induced stress corrosion cracking, allowing for stable application in high-temperature, high-chlorine, and high-stress conditions, such as high-pressure sections of seawater desalination and flue gas desulfurization (FGD) slurry systems.
1.3 Freeman Valve's ASTM A995 Gr. 5A wafer type swing check valve combines strength and corrosion resistance: ASTM A995 Gr. 5A wafer type swing check valve has a yield strength ≥550MPa and a tensile strength ≥795MPa. This high strength allows for thinner valve body designs, reducing equipment structural weight and optimizing life-cycle costs, resulting in a superior overall cost-performance ratio compared to super austenitic steel wafer type swing check valve such as 904L.
1.4 Freeman Valve's ASTM A995 Gr. 5A wafer type swing check valve possesses excellent corrosion fatigue resistance: suitable for scenarios involving both dynamic loads and corrosive environments, such as wafer type swing check valve for circulating pumps on offshore platforms, offering enhanced long-term stability and reducing equipment maintenance frequency.
2. Precautions for using ASTM A995 Gr. 4A wafer type swing check valve
2.1 High-temperature limitations: At temperatures >315°C, ASTM A995 Gr. 4A wafer type swing check valve are prone to intermetallic phase precipitation, leading to valve body embrittlement and decreased corrosion resistance. Therefore, they are not suitable for long-term high-temperature operation; the operating temperature range must be strictly controlled during selection.
3. Selection Guidelines for ASTM A995 Gr. 4A and ASTM A995 Gr. 5A Wafer Type Swing Check Valve
Based on the material properties of both valve grades and actual operating conditions, Freeman Valve offers the following selection recommendations:
3.1 Use chloride ion concentration as the core selection criterion: When the Cl⁻ concentration in the medium is ≤2%, ASTM A995 Gr. 4A wafer type swing check valve is preferred, as they meet general corrosion requirements and offer better cost-effectiveness;
3.2 When the Cl⁻ concentration is >2%, or when the operating conditions involve harsh conditions such as high temperature and high stress, ASTM A995 Gr. 5A wafer type swing check valve are preferred;
3.3 For extreme corrosive conditions such as high-temperature concentrated hydrochloric acid, nickel-based alloy wafer type swing check valve may be considered.
4. Key Application Areas of Freeman Valve's ASTM A995 Gr. 5A Wafer Type Swing Check Valve
Leveraging the excellent corrosion resistance and high strength of its materials, Freeman Valve's ASTM A995 Gr. 5A wafer type swing check valve has been widely used in several harsh and corrosive industries, specifically in the following scenarios:
4.1 Freeman Valve's ASTM A995 Gr. 5A wafer type swing check valve is widely used in the oil and gas industry: for use in offshore platform equipment, including heat exchanger tubes, seawater treatment systems, fire/sprinkler systems, and other valve components, adaptable to the high-salt, high-humidity, and high-pressure corrosive environments of the sea;
4.2 Freeman Valve's ASTM A995 Gr. 5A wafer type swing check valve is widely used in the chemical and petrochemical industries: used in reactors, heat exchangers, storage tanks, and pipelines, capable of withstanding various corrosive materials such as organic acids, inorganic acids, and chlorine-containing media, ensuring continuous and stable chemical production;
4.3 Freeman Valve's ASTM A995 Gr. 5A wafer type swing check valve is widely used in the seawater desalination field: adaptable to the valve requirements of high-pressure seawater pipes, reverse osmosis unit components, evaporators, condensers, etc., resistant to high-chlorine seawater corrosion, and meeting the stringent requirements of seawater desalination processes;
4.4 Freeman Valve's ASTM A995 Gr. 5A wafer type swing check valve is widely used in the power and environmental protection fields: mainly used in flue gas desulfurization (FGD) systems, wastewater treatment equipment, slurry circulation pumps/valve, etc., resisting chloride ion and acidic media corrosion, and contributing to environmentally compliant emissions;
4.5 Freeman Valve's ASTM A995 Gr. 5A wafer type swing check valve is widely used in the marine engineering field: used in seawater cooling systems, subsea pipelines, and platform structural components, resistant to long-term seawater erosion and wave impact, ensuring the long-term reliability of marine engineering equipment.
Design Standard of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve):
Design Acc. to ASME B16.34 (ANSI Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
Design Acc. to EN-12516-1/2 (EN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), DIN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve)).
Test Standard of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve):
Test Acc. to API 598 (ANSI Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
Test Acc. to EN 12266-1/2 (EN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), DIN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve)).
Surface Finishing of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve):
All 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) surface is finely machined to achieve the required roughness and conforms to standard MSS SP-110.
Size of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve):
From DN1/4’’ to 48’’ (ANSI Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
From DN8 to DN1200 (EN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), DIN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve)).
Face to Face of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve):
Face to Face Acc. to ASME B16.10 (ANSI Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
Face to Face Acc. to EN 558-1 (EN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), DIN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve)).
Pressure Rating of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve):
ANSI Class 150 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (ANSI Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
ANSI Class 300 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (ANSI Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
ANSI Class 600 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (ANSI Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
ANSI Class 800 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (ANSI Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
ANSI Class 900 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (ANSI Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
ANSI Class 1500 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (ANSI Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
ANSI Class 2500 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (ANSI Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
EN 1092 PN 16 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (EN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), DIN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
EN 1092 PN 25 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (EN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), DIN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
EN 1092 PN 40 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (EN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), DIN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
EN 1092 PN 63 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (EN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), DIN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
EN 1092 PN 100 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (EN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), DIN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
EN 1092 PN 160 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (EN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), DIN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
EN 1092 PN 250 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (EN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), DIN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
EN 1092 PN 320 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (EN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), DIN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve));
EN 1092 PN 400 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) (EN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), DIN Standard 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve)).
Working Temperature of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve):
Please refer to the "Temperature and Pressure Curve of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve)" for temperature and pressure changes.
Ends Connection of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve):
ANSI Flange Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
ANSI Integral Flange Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
ANSI Welded Flange Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Butt Weld (ASME B16.25) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Butt Weld x ANSI Flange Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
EN 1092 Flange Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
EN 1092 Integral Flange Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
EN 1092 Welded Flange Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Butt Weld (EN 12627) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Butt Weld (ISO 1127) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Butt Weld x EN 1092 Flange Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Male NPT (ASME B1.20.1) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Male BSPP (ISO 228-1) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Male BSPT (ISO 7-1) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Male NPT x Female NPT Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Male BSPP x Female BSPP Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Male BSPT x Female BSPT Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Male NPT x Long Butt Weld (+100 mm) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Male BSPP x Long Butt Weld (+100 mm) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Male BSPT x Long Butt Weld (+100 mm) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Female NPT (ASME B1.20.1) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Female BSPP (ISO 228-1) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Female BSPT (ISO 7-1) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Socket Weld (ASME B16.11) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Socket Weld (EN 12760) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Female NPT x Socket Weld Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Female BSPP x Socket Weld Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Female BSPT x Socket Weld Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Butt Weld (ASME B16.25) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Butt Weld (EN 12627) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Female NPT x Butt Weld Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Female BSPP x Butt Weld Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Female BSPT x Butt Weld Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Female NPT x Long Butt Weld (+100 mm) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Female BSPP x Long Butt Weld (+100 mm) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Female BSPT x Long Butt Weld (+100 mm) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Long Butt Weld (+100 mm Weld Stub) Ends 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve).
CE Marking of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve):
CE Marking is Available to 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) with a Diameter of DN32 or Larger.
Chemical Composition of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve):
For the Chemical Composition of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), please refer to EN 10204 Type 3.1 certificate.
Mechanical Properties of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve):
For the Mechanical Properties of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve), please refer to EN 10204 Type 3.1 certificate.
Certificate of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve):
All 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve) will be delivered with EN 10204 Type 3.1 Certificate.
Approvals of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve):
MSS SP-110 Certified of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
NACE MR 0175 Certified of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve)
API 607 Fire Safe Certified of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
ISO 9001 Certified of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
PED Certified of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve).
Available Upon Request of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve):
NACE MR0175 is available upon request of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
ATEX is available upon request of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
TA-LUFT is available upon request of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
SIL is available upon request of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Degreasing is available upon request of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Fire Safe is available upon request of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Stem Extension is available upon request of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve);
Double Block and Bleed is available upon request of 2507 Wafer Check Valve (UNS S32750 Wafer Check Valve).