ASTM A350 LF2 CL1 Slip-On Flange | LTCS SORF ASME B16.5
ASTM A350 LF2 Class 1 slip-on flanges (SORF) are forged low-temperature carbon steel (LTCS) flanges designed for pressure piping systems operating at sub-zero temperatures.
Manufactured in accordance with ASME B16.5, these slip-on raised face flanges provide a cost-effective and easy-to-install solution for low-temperature service.
We are a professional manufacturer and exporter of ASTM A350 LF2 Flanges A350 LF2 CL1 Slip On Flange RF ASME B16.5 in China.
Slip-On Raised Face (SORF) Design
Slip-on flanges are designed to slide over the pipe and are welded on both the inside and outside.
For low-temperature systems where installation efficiency is important, LF2 SORF flanges offer a practical solution.
Slip-on flanges, also known as ‘plate flanges’,it may have a hub or without hub, This type of flange is usually connected to a pipe by one or two fillet welds (one outside the flange and one inside the flange)
Slip-on flanges mainly used for fluids at low pressure or with little risk of leakage.
ASTM A350 standard
ASTM-A-350LF2 is one of the most common forged carbon/ low-alloy steel grade for forged flanges, forged fittings and valves intended primarily for low-temperature service and requiring notch toughness testing.
ASTM A350 / ASME SA-350 grade LF2 Class 1 & Class 2, Both of them have the same chemical composition and mechanical properties. Even the allowable stresses of Class 1 and Class 2 in ASME Codes are the same. The main characteristic that distinguishes Class 1 from Class 2 is its minimum applicable temperature. The minimum applicable temperatures are -50°F [-46°C] for LF2 Class 1 and -0°F [-18°C] for LF2 Class 2, respectively. The minimum applicable temperature is also the standard Charpy V-notch impact test temperature.
So generally ASME SA-350 grade LF2 CL2 can be used even lower temperature than ASME SA-350 grade LF2 CL1 grade.
ASTM A350 LF2 Chemical Composition
| C | Mn | P | Si | S |
|---|---|---|---|---|
| 0.03 | 0.6-1.35 | 0.035 | 0.15-0.3 | 0.04 |
ASTM A350 LF2 Mechanical Properties
| Tensile Strength | Yield Strength | Elongation |
|---|---|---|
| 485 – 655 (Mpa) | 250 Min (Mpa) | 22 (%) |
ASTM A350 Grade LF2 Heat treatment condition,
ASTM A350 Grade LF2 is a general Carbon steel usually supplied in the Normalised, Normalised and Tempered or Quench and Tempered condition.
ASTM A350 Grade LF2 Charpy V-Notch Energy Requirements for Standard Size [10 by 10 mm] Specimens
| Minimum Impact Energy Required for Average of Each Set of Three Specimens, ft-lbf [J] | Minimum Impact Energy Permitted for One Specimen only of a Set, ft-lbf [J] | |
| LF2 Class 1 | 15 [20] | 12 [16] |
| LF2 Class 2 | 20 [27] | 15 [20] |
Standard Impact Test Temperature for Standard Size [10 by 10 mm] Specimens
| Grade | Test Temperature, °F [°C] |
| LF2 Class 1 | −50 [−46] |
| LF2 Class 2 | −0 [−18] |
ASTM A350 LF2 Cl1 Flanges specification
Dimensions & Standards
-
Material Standard: ASTM A350 / ASME SA350
-
Grade: LF2 Class 1
-
Flange Standard: ASME B16.5
-
Facing: SORF (Raised Face)
ASME B16.5 ASME B16.47 Slip On flange.
Size: 1/2″/1“/2″/3″/4″/5″/6″/8″10″/12″/14″/16″/18″/20″/24″/28″/30″/32″/36″/48″
Thichkness:Sch40,Sch Std,Sch 80.SchXS,SchXXS,Sch100.Sch160
Class 150, 300, 400, 600, 900, 1500 and 2500
Flange Face:Raise Face.Flat Face,Ring joint
