ASTM A995 Gr. 6A is a material designed for high-chlorine media, with a PREN of approximately 41–44. Compared to ASTM A995 Gr. 4A and ASTM A995 Gr. 5A valves, ASTM A995 Gr. 6A valves have the following advantages:
① ASTM A995 Gr. 6A valves contain tungsten, which enhances their resistance to pitting and crevice corrosion;
② The PREN of ASTM A995 Gr. 6A valves is higher than that of ASTM A995 Gr. 4A and ASTM A995 Gr. 5A valves, therefore, ASTM A995 Gr. 6A valves have a higher critical pitting temperature for resistance to high-temperature seawater and high-chlorine brine;
③ ASTM A995 Gr. 6A valves contain Cu, which significantly improves their resistance to corrosion from dilute sulfuric acid, phosphoric acid, and acidic + chloride ion complex media.
Material Selection Tips:
① For mild chloride environments and ambient temperature seawater, ASTM A995 Gr. 4A valves are recommended.
② For high-temperature seawater and simple high-chlorine brine, ASTM A995 Gr. 5A valves are recommended.
③ For environments with coexisting high-chlorine and dilute inorganic acids, requiring higher crevice corrosion resistance, ASTM A995 Gr. 6A valves are recommended.
④ For polar cryogenic conditions, ASTM A995 Gr. 6A-G valves are recommended (with supplementary requirement S52).
Design Standard of Duplex Steel 6A Check Valve (UNS S32760 Check Valve):
Design Acc. to ASME B16.34 (ANSI Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
Design Acc. to EN-12516-1/2 (EN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve), DIN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve)).
Test Standard of Duplex Steel 6A Check Valve (UNS S32760 Check Valve):
Test Acc. to API 598 (ANSI Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
Test Acc. to EN 12266-1/2 (EN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve), DIN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve)).
Surface Finishing of Duplex Steel 6A Check Valve (UNS S32760 Check Valve):
All Duplex Steel 6A Check Valve (UNS S32760 Check Valve) surface is finely machined to achieve the required roughness and conforms to standard MSS SP-110.
Size of Duplex Steel 6A Check Valve (UNS S32760 Check Valve):
From DN1/4’’ to 48’’ (ANSI Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
From DN8 to DN1200 (EN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve), DIN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve)).
Face to Face of Duplex Steel 6A Check Valve (UNS S32760 Check Valve):
Face to Face Acc. to ASME B16.10 (ANSI Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
Face to Face Acc. to EN 558-1 (EN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve), DIN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve)).
Pressure Rating of Duplex Steel 6A Check Valve (UNS S32760 Check Valve):
ANSI Class 150 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (ANSI Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
ANSI Class 300 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (ANSI Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
ANSI Class 600 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (ANSI Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
ANSI Class 800 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (ANSI Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
ANSI Class 900 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (ANSI Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
ANSI Class 1500 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (ANSI Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
ANSI Class 2500 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (ANSI Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
EN 1092 PN 16 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (EN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve), DIN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
EN 1092 PN 25 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (EN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve), DIN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
EN 1092 PN 40 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (EN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve), DIN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
EN 1092 PN 63 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (EN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve), DIN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
EN 1092 PN 100 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (EN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve), DIN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
EN 1092 PN 160 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (EN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve), DIN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
EN 1092 PN 250 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (EN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve), DIN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
EN 1092 PN 320 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (EN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve), DIN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve));
EN 1092 PN 400 Duplex Steel 6A Check Valve (UNS S32760 Check Valve) (EN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve), DIN Standard Duplex Steel 6A Check Valve (UNS S32760 Check Valve)).
Working Temperature of Duplex Steel 6A Check Valve (UNS S32760 Check Valve):
Please refer to the "Temperature and Pressure Curve of Duplex Steel 6A Check Valve (UNS S32760 Check Valve)" for temperature and pressure changes.
Ends Connection of Duplex Steel 6A Check Valve (UNS S32760 Check Valve):
ANSI Flange Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
ANSI Integral Flange Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
ANSI Welded Flange Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Butt Weld (ASME B16.25) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Butt Weld x ANSI Flange Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
EN 1092 Flange Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
EN 1092 Integral Flange Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
EN 1092 Welded Flange Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Butt Weld (EN 12627) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Butt Weld (ISO 1127) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Butt Weld x EN 1092 Flange Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Male NPT (ASME B1.20.1) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Male BSPP (ISO 228-1) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Male BSPT (ISO 7-1) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Male NPT x Female NPT Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Male BSPP x Female BSPP Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Male BSPT x Female BSPT Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Male NPT x Long Butt Weld (+100 mm) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Male BSPP x Long Butt Weld (+100 mm) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Male BSPT x Long Butt Weld (+100 mm) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Female NPT (ASME B1.20.1) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Female BSPP (ISO 228-1) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Female BSPT (ISO 7-1) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Socket Weld (ASME B16.11) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Socket Weld (EN 12760) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Female NPT x Socket Weld Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Female BSPP x Socket Weld Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Female BSPT x Socket Weld Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Butt Weld (ASME B16.25) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Butt Weld (EN 12627) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Female NPT x Butt Weld Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Female BSPP x Butt Weld Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Female BSPT x Butt Weld Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Female NPT x Long Butt Weld (+100 mm) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Female BSPP x Long Butt Weld (+100 mm) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Female BSPT x Long Butt Weld (+100 mm) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Long Butt Weld (+100 mm Weld Stub) Ends Duplex Steel 6A Check Valve (UNS S32760 Check Valve).
CE Marking of Duplex Steel 6A Check Valve (UNS S32760 Check Valve):
CE Marking is Available to Duplex Steel 6A Check Valve (UNS S32760 Check Valve) with a Diameter of DN32 or Larger.
Chemical Composition of Duplex Steel 6A Check Valve (UNS S32760 Check Valve):
For the Chemical Composition of Duplex Steel 6A Check Valve (UNS S32760 Check Valve), please refer to EN 10204 Type 3.1 certificate.
Mechanical Properties of Duplex Steel 6A Check Valve (UNS S32760 Check Valve):
For the Mechanical Properties of Duplex Steel 6A Check Valve (UNS S32760 Check Valve), please refer to EN 10204 Type 3.1 certificate.
Certificate of Duplex Steel 6A Check Valve (UNS S32760 Check Valve):
All Duplex Steel 6A Check Valve (UNS S32760 Check Valve) will be delivered with EN 10204 Type 3.1 Certificate.
Approvals of Duplex Steel 6A Check Valve (UNS S32760 Check Valve):
MSS SP-110 Certified of Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
NACE MR 0175 Certified of Duplex Steel 6A Check Valve (UNS S32760 Check Valve)
API 607 Fire Safe Certified of Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
ISO 9001 Certified of Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
PED Certified of Duplex Steel 6A Check Valve (UNS S32760 Check Valve).
Available Upon Request of Duplex Steel 6A Check Valve (UNS S32760 Check Valve):
NACE MR0175 is available upon request of Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
ATEX is available upon request of Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
TA-LUFT is available upon request of Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
SIL is available upon request of Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Degreasing is available upon request of Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Fire Safe is available upon request of Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Stem Extension is available upon request of Duplex Steel 6A Check Valve (UNS S32760 Check Valve);
Double Block and Bleed is available upon request of Duplex Steel 6A Check Valve (UNS S32760 Check Valve).