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ASTM A350 LF2 CL1 Girth Flanges NPS 1/2 to 24 Class 150 to 2500#
ASTM A350 LF2 CL1 Girth Flanges NPS 1/2 to 24 Class 150 to 2500#
ASTM A350 LF2 CL1 Girth Flanges NPS 1/2 to 24 Class 150 to 2500#
ASTM A350 LF2 CL1 Girth Flanges NPS 1/2 to 24 Class 150 to 2500#
ASTM A350 LF2 CL1 Girth Flanges NPS 1/2 to 24 Class 150 to 2500#
ASTM A350 LF2 CL1 Girth Flanges NPS 1/2 to 24 Class 150 to 2500#
ASTM A350 LF2 CL1 Girth Flanges NPS 1/2 to 24 Class 150 to 2500#
ASTM A350 LF2 CL1 Girth Flanges NPS 1/2 to 24 Class 150 to 2500#
Specifications
Brand Name :
YUHONG
Model Number :
ASTM A350 LF2 CL1
Certification :
API, PED
Place of Origin :
CHINA
MOQ :
1pcs
Price :
Negotiable
Payment Terms :
L/C,T/T
Supply Ability :
100Tons/Month
Delivery Time :
According to quantity
Packaging Details :
PLY-WOODEN CASE
Material Grade :
ASTM A350 LF2 Class 1
Impact Test Temperature :
-46°C / -50°F
Pressure Rating :
ASME Class 150 to 2500#
Flange Face Type :
RF (Raised Face), RTJ (Ring Type Joint)
Compliance Standard :
ASME B16.5, MSS SP-44
Cryogenic Certification :
Charpy V-Notch Tested
Size Range :
NPS 1/2" to 24"
H₂S Service Compatible :
NACE MR0175 Compliant
Description

1. Introduction to ASTM A350 LF2 Class 1 Girth Flanges


ASTM A350 LF2 Class 1 Girth Flanges are forged carbon/low-alloy steel fittings designed for low-temperature service down


to -46°C (-50°F). These flanges meet stringent impact toughness requirements (Charpy V-notch testing) for cryogenic


applications in pipelines, LNG plants, and offshore systems. Manufactured in compliance with ASME B16.5 dimensional


standards, they ensure leak-proof connections in high-pressure environments.


2. Chemical Composition Requirements



The chemical composition of ASTM A350 LF2 CL1 ensures optimal low-temperature performance and weldability:



Element Composition (% Max) Key Function


Carbon (C)


0.30%


Strength & Hardness


Manganese (Mn)


0.60-1.35%


Toughness Enhancer


Phosphorus (P)


0.035%


Weldability Control


Sulfur (S)


0.040%


Machinability


Silicon (Si)


0.15-0.30%


Deoxidizer


Nickel (Ni)


0.40% Max


Low-Temp Toughness


3. Mechanical Properties of LF2 CL1 Flanges




Property


Requirement


Test Standard


Tensile Strength


485-655 MPa (70-95 ksi)


ASTM A370


Yield Strength (Min)


250 MPa (36 ksi)


ASTM A370


Elongation (Min)


22%


ASTM A370


Impact Toughness
(Charpy V-notch at -46°C/-50°F)


Avg. ≥ 20 J (15 ft-lbf)
Single min. ≥ 14 J (10 ft-lbf)


ASTM A370


4. Equivalent Grades & International Standards




Standard


Equivalent Grade


Key Differences


EN 10222


P355NH (1.0566)


Higher Ni allowance (≤1.0%)


NACE MR0175


Compliant


H₂S service approved


JIS G3202


SFVQ2A


Similar impact values


5. Key Applications in Industry



ASTM A350 LF2 CL1 flanges are critical in:

  • Cryogenic Systems: LNG terminals, liquid nitrogen pipelines
  • Oil & Gas: Subsea pipelines, Arctic drilling rigs
  • Power Plants: Cooling systems, hydrogen handling
  • Chemical Processing: Ethylene, ammonia, and propane transport


6. Manufacturing & Quality Assurance


  • Process: Die-forged & heat-treated (normalized or quenched + tempered)
  • Testing: 100% UT + hydrostatic testing per ASME B16.34
  • Certification: Mill Test Reports (MTRs) with traceable heat numbers
  • Dimensions: ASME B16.5 Class 150 to 2500, NPS 1/2" to 24"

ASTM A350 LF2 CL1 Girth Flanges NPS 1/2



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ASTM A350 LF2 CL1 Girth Flanges NPS 1/2" to 24" Class 150 to 2500#

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Product Detail
Brand Name :
YUHONG
Model Number :
ASTM A350 LF2 CL1
Certification :
API, PED
Place of Origin :
CHINA
MOQ :
1pcs
Price :
Negotiable
Contact Supplier
ASTM A350 LF2 CL1 Girth Flanges NPS 1/2 to 24 Class 150 to 2500#
ASTM A350 LF2 CL1 Girth Flanges NPS 1/2 to 24 Class 150 to 2500#
ASTM A350 LF2 CL1 Girth Flanges NPS 1/2 to 24 Class 150 to 2500#
ASTM A350 LF2 CL1 Girth Flanges NPS 1/2 to 24 Class 150 to 2500#

Yuhong Group Co.,Ltd

Verified Supplier
13 Years
zhejiang, ningbo
Since 2007
Business Type :
Manufacturer, Distributor/Wholesaler, Importer, Exporter, Trading Company, Seller, Other
Main Products :
Stainless Steel Seamless Pipe, Stainless Steel Seamless Tube, Duplex Stainless Steel Pipe
Total Annual :
50M-70M
Employee Number :
50~850
Certification Level :
Verified Supplier
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