Inconel 625 check valves are alloy valves capable of withstanding various extreme corrosive environments and high-temperature effects, with a maximum operating temperature of 982℃ (1800℉). The most important features of Inconel 625 check valves are their high-temperature resistance, corrosion resistance, oxidation resistance, and creep resistance.
2.1 Freeman Valve's Inconel 625 check valves exhibit excellent corrosion resistance to both oxidizing acids (nitric acid, chromic acid) and reducing acids (sulfuric acid, hydrochloric acid), particularly performing exceptionally well under low- and medium-temperature conditions with dilute hydrochloric acid and moderately concentrated sulfuric acid.
2.2 Freeman Valve's Inconel 625 check valves demonstrate superior resistance to chloride pitting, crevice corrosion, and stress corrosion cracking (SCC) compared to Incoloy 825, allowing them to withstand long-term corrosion from highly chlorinated media such as seawater, brine, and brines.
2.3 Freeman Valve's Inconel 625 check valves are resistant to sulfide and fluoride corrosion, making them suitable for complex corrosive environments such as acidic oil and gas wells and hydrometallurgical processes.
2.4 Freeman Valve's Inconel 625 check valves exhibit stable mechanical properties over a wide temperature range.
①Inconel 625 check valves have a tensile strength of approximately 690 MPa at room temperature in the solution-treated state, with an elongation of ≥30% and excellent toughness.
②Inconel 625 check valves maintain sufficient strength and creep resistance even at high temperatures up to 982℃, and show no risk of brittle fracture at temperatures down to -253℃.
③Inconel 625 check valves do not require aging treatment, avoiding performance fluctuations caused by aging processes, and exhibit high batch-to-batch material stability.
2.5 Freeman Valve's Inconel 625 check valves possess excellent oxidation resistance and heat resistance.
①Inconel 625 check valves exhibit good oxidation resistance in static air below 982℃, forming a dense chromium-nickel oxide film on the surface, which resists oxidative corrosion from high-temperature combustion gases.
②Inconel 625 check valves can withstand instantaneous operating temperatures up to 1090℃.
③Inconel 625 check valves have good resistance to thermal fatigue and can withstand repeated temperature changes.
2.6 Freeman Valve's Inconel 625 check valves exhibit excellent weldability.
Inconel 625 check valves can be welded using conventional processes such as argon arc welding and electron beam welding. The strength and corrosion resistance of the weld joint are essentially the same as the base material. Furthermore, Inconel 625 check valves require no heat treatment after welding, making them ideal for large-diameter applications.
2.7 Freeman Valve's Inconel 625 check valves demonstrate good radiation resistance.
Inconel 625 check valves exhibit good resistance to neutron and gamma-ray radiation, with minimal performance degradation after irradiation, making them suitable for the radiation environment of the nuclear industry.
Limited resistance to hot corrosion:
In high-temperature gas environments containing sulfur and vanadium (such as marine diesel engine exhaust and coal-fired boiler flue gas), their resistance to hot corrosion is relatively weak, requiring the application of a protective coating (such as an aluminum-chromium coating) for long-term use.
Design Standard of Inconel 625 Check Valve:
Design Acc. to ASME B16.34 (ANSI Standard Inconel 625 Check Valve);
Design Acc. to EN-12516-1/2 (EN Standard Inconel 625 Check Valve, DIN Standard Inconel 625 Check Valve).
Test Standard of Inconel 625 Check Valve:
Test Acc. to API 598 (ANSI Standard Inconel 625 Check Valve);
Test Acc. to EN 12266-1/2 (EN Standard Inconel 625 Check Valve, DIN Standard Inconel 625 Check Valve).
Surface Finishing of Inconel 625 Check Valve:
All Inconel 625 Check Valve surface is finely machined to achieve the required roughness and conforms to standard MSS SP-110.
Size of Inconel 625 Check Valve:
From DN1/4’’ to 48’’ (ANSI Standard Inconel 625 Check Valve);
From DN8 to DN1200 (EN Standard Inconel 625 Check Valve, DIN Standard Inconel 625 Check Valve).
Face to Face of Inconel 625 Check Valve:
Face to Face Acc. to ASME B16.10 (ANSI Standard Inconel 625 Check Valve);
Face to Face Acc. to EN 558-1 (EN Standard Inconel 625 Check Valve, DIN Standard Inconel 625 Check Valve).
Pressure Rating of Inconel 625 Check Valve:
ANSI Class 150 Inconel 625 Check Valve (ANSI Standard Inconel 625 Check Valve);
ANSI Class 300 Inconel 625 Check Valve (ANSI Standard Inconel 625 Check Valve);
ANSI Class 600 Inconel 625 Check Valve (ANSI Standard Inconel 625 Check Valve);
ANSI Class 800 Inconel 625 Check Valve (ANSI Standard Inconel 625 Check Valve);
ANSI Class 900 Inconel 625 Check Valve (ANSI Standard Inconel 625 Check Valve);
ANSI Class 1500 Inconel 625 Check Valve (ANSI Standard Inconel 625 Check Valve);
ANSI Class 2500 Inconel 625 Check Valve (ANSI Standard Inconel 625 Check Valve);
EN 1092 PN 16 Inconel 625 Check Valve (EN Standard Inconel 625 Check Valve, DIN Standard Inconel 625 Check Valve);
EN 1092 PN 25 Inconel 625 Check Valve (EN Standard Inconel 625 Check Valve, DIN Standard Inconel 625 Check Valve);
EN 1092 PN 40 Inconel 625 Check Valve (EN Standard Inconel 625 Check Valve, DIN Standard Inconel 625 Check Valve);
EN 1092 PN 63 Inconel 625 Check Valve (EN Standard Inconel 625 Check Valve, DIN Standard Inconel 625 Check Valve);
EN 1092 PN 100 Inconel 625 Check Valve (EN Standard Inconel 625 Check Valve, DIN Standard Inconel 625 Check Valve);
EN 1092 PN 160 Inconel 625 Check Valve (EN Standard Inconel 625 Check Valve, DIN Standard Inconel 625 Check Valve);
EN 1092 PN 250 Inconel 625 Check Valve (EN Standard Inconel 625 Check Valve, DIN Standard Inconel 625 Check Valve);
EN 1092 PN 320 Inconel 625 Check Valve (EN Standard Inconel 625 Check Valve, DIN Standard Inconel 625 Check Valve);
EN 1092 PN 400 Inconel 625 Check Valve (EN Standard Inconel 625 Check Valve, DIN Standard Inconel 625 Check Valve).
Working Temperature of Inconel 625 Check Valve:
Please refer to the "Temperature and Pressure Curve of Inconel 625 Check Valve" for temperature and pressure changes.
Ends Connection of Inconel 625 Check Valve:
ANSI Flange Ends Inconel 625 Check Valve;
ANSI Integral Flange Ends Inconel 625 Check Valve;
ANSI Welded Flange Ends Inconel 625 Check Valve;
Butt Weld (ASME B16.25) Ends Inconel 625 Check Valve;
Butt Weld x ANSI Flange Ends Inconel 625 Check Valve;
EN 1092 Flange Ends Inconel 625 Check Valve;
EN 1092 Integral Flange Ends Inconel 625 Check Valve;
EN 1092 Welded Flange Ends Inconel 625 Check Valve;
Butt Weld (EN 12627) Ends Inconel 625 Check Valve;
Butt Weld (ISO 1127) Ends Inconel 625 Check Valve;
Butt Weld x EN 1092 Flange Ends Inconel 625 Check Valve;
Male NPT (ASME B1.20.1) Ends Inconel 625 Check Valve;
Male BSPP (ISO 228-1) Ends Inconel 625 Check Valve;
Male BSPT (ISO 7-1) Ends Inconel 625 Check Valve;
Male NPT x Female NPT Ends Inconel 625 Check Valve;
Male BSPP x Female BSPP Ends Inconel 625 Check Valve;
Male BSPT x Female BSPT Ends Inconel 625 Check Valve;
Male NPT x Long Butt Weld (+100 mm) Ends Inconel 625 Check Valve;
Male BSPP x Long Butt Weld (+100 mm) Ends Inconel 625 Check Valve;
Male BSPT x Long Butt Weld (+100 mm) Ends Inconel 625 Check Valve;
Female NPT (ASME B1.20.1) Ends Inconel 625 Check Valve;
Female BSPP (ISO 228-1) Ends Inconel 625 Check Valve;
Female BSPT (ISO 7-1) Ends Inconel 625 Check Valve;
Socket Weld (ASME B16.11) Ends Inconel 625 Check Valve;
Socket Weld (EN 12760) Ends Inconel 625 Check Valve;
Female NPT x Socket Weld Ends Inconel 625 Check Valve;
Female BSPP x Socket Weld Ends Inconel 625 Check Valve;
Female BSPT x Socket Weld Ends Inconel 625 Check Valve;
Butt Weld (ASME B16.25) Ends Inconel 625 Check Valve;
Butt Weld (EN 12627) Ends Inconel 625 Check Valve;
Female NPT x Butt Weld Ends Inconel 625 Check Valve;
Female BSPP x Butt Weld Ends Inconel 625 Check Valve;
Female BSPT x Butt Weld Ends Inconel 625 Check Valve;
Female NPT x Long Butt Weld (+100 mm) Ends Inconel 625 Check Valve;
Female BSPP x Long Butt Weld (+100 mm) Ends Inconel 625 Check Valve;
Female BSPT x Long Butt Weld (+100 mm) Ends Inconel 625 Check Valve;
Long Butt Weld (+100 mm Weld Stub) Ends Inconel 625 Check Valve.
CE Marking of Inconel 625 Check Valve:
CE Marking is Available to Inconel 625 Check Valve with a Diameter of DN32 or Larger.
Chemical Composition of Inconel 625 Check Valve:
For the Chemical Composition of Inconel 625 Check Valve, please refer to EN 10204 Type 3.1 certificate.
Mechanical Properties of Inconel 625 Check Valve:
For the Mechanical Properties of Inconel 625 Check Valve, please refer to EN 10204 Type 3.1 certificate.
Certificate of Inconel 625 Check Valve:
All Inconel 625 Check Valve will be delivered with EN 10204 Type 3.1 Certificate.
Approvals of Inconel 625 Check Valve:
MSS SP-110 Certified of Inconel 625 Check Valve;
NACE MR 0175 Certified of Inconel 625 Check Valve
API 607 Fire Safe Certified of Inconel 625 Check Valve;
ISO 9001 Certified of Inconel 625 Check Valve;
PED Certified of Inconel 625 Check Valve.
Available Upon Request of Inconel 625 Check Valve:
NACE MR0175 is available upon request of Inconel 625 Check Valve;
ATEX is available upon request of Inconel 625 Check Valve;
TA-LUFT is available upon request of Inconel 625 Check Valve;
SIL is available upon request of Inconel 625 Check Valve;
Degreasing is available upon request of Inconel 625 Check Valve;
Fire Safe is available upon request of Inconel 625 Check Valve;