Extreme Low-Temperature Service Ready: Haihao Group Delivers ASTM A350 LF2 CL1 Flanges to Indonesia

Haihao Group has completed the production and dispatch of a multi-specification shipment of forged flanges for an onshore gas treatment project in Indonesia. Manufactured exclusively from normalized ASTM A350 LF2 Class 1 carbon steel, this comprehensive order encompasses high-pressure Weld Neck (WN), Ring Type Joint (RTJ), Raised Face (RF), Long Weld Neck (LWN), and Blind flanges engineered for severe sub-zero thermal and pressure cycling.

Comprehensive Cargo Manifest & Engineering Specifications

Choosing a certified ASTM A350 LF2 CL1 flange manufacturer guarantees exact face finishes, smooth neck transitions, and flawless pressure rating compliance. Below is the specification manifest for the Indonesian delivery:

ASME B16.47 Series A & ASME B16.5 WN Flanges: 36″ (600# / 31.75 mm THK), 30″ (600# / 31.75 mm THK), 28″ (900# / 31.75 mm THK), 36″ (900# / 38.1 mm THK), 6″ (600# SCH 80), and 3″ (600#, 900#, 1500# SCH 160).

High-Pressure RTJ & RF Flanges: 24″ & 30″ (600# & 900# RTJ-SR), 24″ & 12″ (600# RF-SR), 6″ (900# RTJ-SR), 3″ (600# RF-SR), 2″ (600# & 1500# RTJ-SR / RF-SR).

Long Weld Neck (LWN) & Smooth Radius Necks: 2″ (600# & 1500# Long High Neck), smooth radius necks in 36″ (THK 150 & THK 200), 30″ (THK 110), 28″ (THK 150), 6″ (THK 50), and 3″ (THK 50).

Blind Flanges (RF & RTJ Facing): 24″ (600# & 900#), 3″ (600#), and 2″ (600# & 1500#).

Metallurgical Verification, PWHT Simulation & Low-Temp Impact Testing

Cryogenic and low-temperature hydrocarbon operations require complete confidence in material fracture toughness. Every component produced by our ASTM A350 LF2 CL1 flange manufacturer facility underwent standardized heat treatment to guarantee uniform fine-grain microstructure.

To fulfill client requirements for critical energy assets in South East Asia, key metallurgical testing included:

-46°C Low-Temperature Charpy V-Notch Testing: Verified toughness achieving an average impact energy ≥27J (minimum single value ≥20J ) at -46°C.

100% Volumetric & Surface NDT Inspection: Full Ultrasonic Testing (UT) and Liquid Penetrant Inspection (PT) performed with certified test reports provided.

Dual Test Coupon Protocols: Manufactured two dedicated test blocks per heat lot—one coupon dedicated to Chemical Analysis, Physical Mechanical Testing, and Low-Temp Impact Testing; the second coupon subjected to Simulated Post-Weld Heat Treatment (SPWHT) to verify property retention after site installation welding.

Surface Preservation & Logistics Protection

As an experienced ASTM A350 LF2 CL1 flange manufacturer, Haihao Group enforced heavy-duty protection protocols to prevent moisture corrosion during sea transit to Indonesia:

All flange faces and weld ends were treated with a protective anti-rust oil coating.

Raised faces and RTJ grooves were fitted with custom wooden/plastic end caps to guard sealing surfaces against impact damage.

Shipped with full EN 10204 3.1 Mill Test Certificates detailing heat treatment charts, UT/PT reports, and test coupon results.

Collaborating with a reliable ASTM A350 LF2 CL1 flange manufacturer ensures complete compliance with ASME B16.5 and ASME B16.47 manufacturing standards.

Partner with Haihao Group for Indonesia Projects

Require certified low-temperature forged flanges, custom heavy-wall weld necks, or specialized SPWHT test documentation for your next project? Trust a proven ASTM A350 LF2 CL1 flange manufacturer. Contact the Haihao Group technical team today for comprehensive quotations and engineering support.