F44 Y-type strainers, also known as 254 SMO valves or UNS S31254 valves, are valves made of high-molybdenum super austenitic stainless steel. The core advantages of F44 Y-type strainers are: extreme resistance to chlorine corrosion + high strength, making them specifically designed for high-chlorine operating conditions.
① High resistance to pitting and crevice corrosion (PREN≈42–44, far exceeding 316L's 24 and 904L's 36), making them the preferred valve for high-chlorine environments such as seawater and brine;
② Excellent resistance to stress corrosion cracking (SCC), exhibiting significantly better SCC resistance than ordinary austenitic and duplex steels in chlorine-containing + high-temperature water environments;
③ Strong acid and alkali resistance, resistant to sulfuric acid, phosphoric acid, acetic acid, formic acid, and alkaline solutions, with a wide applicable pH range.
With a yield strength ≥300MPa and tensile strength ≥650MPa, lightweight valve designs are possible.
① When the temperature is below -50℃, the toughness decreases, so F44 Y-type strainers are not suitable for extremely cold conditions without insulation;
② When the temperature is above 400℃, the strength decreases significantly, so F44 Y-type strainers should avoid prolonged use at high temperatures.
4.1 The core application scenario for Freeman Valve's F44 Y-type strainers is in the marine and seawater industry. Examples include: seawater desalination (concentrated brine pipelines, etc.), ships and offshore platforms (ballast water systems, fire-fighting pipelines, subsea pipelines, wellheads, etc.), and coastal power plants (seawater cooling systems, condensers, circulating water pipelines, etc.);
4.2 Freeman Valve's F44 Y-type strainers have been widely used in the chemical and pharmaceutical industries. Examples include: chlor-alkali industry (brine refining, electrolytic cell accessories, chlorine treatment pipelines), pulp bleaching (chlorine dioxide, sodium hypochlorite media equipment, scrubbing towers), and fine chemicals (chlorine-containing intermediate reaction vessels, distillation towers). 4.3 Freeman Valve's F44 Y-type strainers are widely used in the oil and gas and energy sectors. Examples include: wellhead equipment, throttle valves, and gathering pipelines for oil and gas extraction (high-chlorine, high-salinity formation water).
4.4 Freeman Valve's F44 Y-type strainers are widely used in brine and brines (evaporators and crystallizers in Salt Lake chemical plants and salt production facilities), and high-temperature, high-chlorine water (closed-loop circulating water in thermal power plants, hot springs, and heat exchangers in geothermal equipment).
Design Standard of F44 Y Type Strainer (UNS S31254 Y Type Strainer):
Design Acc. to ASME B16.34 (ANSI Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
Design Acc. to EN-12516-1/2 (EN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer), DIN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer)).
Test Standard of F44 Y Type Strainer (UNS S31254 Y Type Strainer):
Test Acc. to API 598 (ANSI Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
Test Acc. to EN 12266-1/2 (EN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer), DIN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer)).
Surface Finishing of F44 Y Type Strainer (UNS S31254 Y Type Strainer):
All F44 Y Type Strainer (UNS S31254 Y Type Strainer) surface is finely machined to achieve the required roughness and conforms to standard MSS SP-110.
Size of F44 Y Type Strainer (UNS S31254 Y Type Strainer):
From DN1/4’’ to 48’’ (ANSI Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
From DN8 to DN1200 (EN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer), DIN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer)).
Face to Face of F44 Y Type Strainer (UNS S31254 Y Type Strainer):
Face to Face Acc. to ASME B16.10 (ANSI Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
Face to Face Acc. to EN 558-1 (EN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer), DIN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer)).
Pressure Rating of F44 Y Type Strainer (UNS S31254 Y Type Strainer):
ANSI Class 150 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (ANSI Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
ANSI Class 300 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (ANSI Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
ANSI Class 600 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (ANSI Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
ANSI Class 800 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (ANSI Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
ANSI Class 900 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (ANSI Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
ANSI Class 1500 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (ANSI Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
ANSI Class 2500 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (ANSI Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
EN 1092 PN 16 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (EN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer), DIN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
EN 1092 PN 25 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (EN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer), DIN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
EN 1092 PN 40 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (EN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer), DIN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
EN 1092 PN 63 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (EN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer), DIN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
EN 1092 PN 100 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (EN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer), DIN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
EN 1092 PN 160 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (EN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer), DIN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
EN 1092 PN 250 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (EN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer), DIN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
EN 1092 PN 320 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (EN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer), DIN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer));
EN 1092 PN 400 F44 Y Type Strainer (UNS S31254 Y Type Strainer) (EN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer), DIN Standard F44 Y Type Strainer (UNS S31254 Y Type Strainer)).
Working Temperature of F44 Y Type Strainer (UNS S31254 Y Type Strainer):
Please refer to the "Temperature and Pressure Curve of F44 Y Type Strainer (UNS S31254 Y Type Strainer)" for temperature and pressure changes.
Ends Connection of F44 Y Type Strainer (UNS S31254 Y Type Strainer):
ANSI Flange Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
ANSI Integral Flange Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
ANSI Welded Flange Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Butt Weld (ASME B16.25) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Butt Weld x ANSI Flange Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
EN 1092 Flange Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
EN 1092 Integral Flange Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
EN 1092 Welded Flange Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Butt Weld (EN 12627) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Butt Weld (ISO 1127) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Butt Weld x EN 1092 Flange Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Male NPT (ASME B1.20.1) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Male BSPP (ISO 228-1) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Male BSPT (ISO 7-1) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Male NPT x Female NPT Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Male BSPP x Female BSPP Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Male BSPT x Female BSPT Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Male NPT x Long Butt Weld (+100 mm) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Male BSPP x Long Butt Weld (+100 mm) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Male BSPT x Long Butt Weld (+100 mm) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Female NPT (ASME B1.20.1) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Female BSPP (ISO 228-1) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Female BSPT (ISO 7-1) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Socket Weld (ASME B16.11) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Socket Weld (EN 12760) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Female NPT x Socket Weld Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Female BSPP x Socket Weld Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Female BSPT x Socket Weld Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Butt Weld (ASME B16.25) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Butt Weld (EN 12627) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Female NPT x Butt Weld Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Female BSPP x Butt Weld Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Female BSPT x Butt Weld Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Female NPT x Long Butt Weld (+100 mm) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Female BSPP x Long Butt Weld (+100 mm) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Female BSPT x Long Butt Weld (+100 mm) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Long Butt Weld (+100 mm Weld Stub) Ends F44 Y Type Strainer (UNS S31254 Y Type Strainer).
CE Marking of F44 Y Type Strainer (UNS S31254 Y Type Strainer):
CE Marking is Available to F44 Y Type Strainer (UNS S31254 Y Type Strainer) with a Diameter of DN32 or Larger.
Chemical Composition of F44 Y Type Strainer (UNS S31254 Y Type Strainer):
For the Chemical Composition of F44 Y Type Strainer (UNS S31254 Y Type Strainer), please refer to EN 10204 Type 3.1 certificate.
Mechanical Properties of F44 Y Type Strainer (UNS S31254 Y Type Strainer):
For the Mechanical Properties of F44 Y Type Strainer (UNS S31254 Y Type Strainer), please refer to EN 10204 Type 3.1 certificate.
Certificate of F44 Y Type Strainer (UNS S31254 Y Type Strainer):
All F44 Y Type Strainer (UNS S31254 Y Type Strainer) will be delivered with EN 10204 Type 3.1 Certificate.
Approvals of F44 Y Type Strainer (UNS S31254 Y Type Strainer):
MSS SP-110 Certified of F44 Y Type Strainer (UNS S31254 Y Type Strainer);
NACE MR 0175 Certified of F44 Y Type Strainer (UNS S31254 Y Type Strainer)
API 607 Fire Safe Certified of F44 Y Type Strainer (UNS S31254 Y Type Strainer);
ISO 9001 Certified of F44 Y Type Strainer (UNS S31254 Y Type Strainer);
PED Certified of F44 Y Type Strainer (UNS S31254 Y Type Strainer).
Available Upon Request of F44 Y Type Strainer (UNS S31254 Y Type Strainer):
NACE MR0175 is available upon request of F44 Y Type Strainer (UNS S31254 Y Type Strainer);
ATEX is available upon request of F44 Y Type Strainer (UNS S31254 Y Type Strainer);
TA-LUFT is available upon request of F44 Y Type Strainer (UNS S31254 Y Type Strainer);
SIL is available upon request of F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Degreasing is available upon request of F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Fire Safe is available upon request of F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Stem Extension is available upon request of F44 Y Type Strainer (UNS S31254 Y Type Strainer);
Double Block and Bleed is available upon request of F44 Y Type Strainer (UNS S31254 Y Type Strainer).