Haihao Group Delivers ASTM A350 LF2 Flanges for Kazakhstan Pipeline Project

Haihao Group has successfully completed the supply of carbon steel flanges for a pipeline project in Kazakhstan. The shipment includes a range of welding neck flanges and blind flanges manufactured from ASTM A350 LF2 Class 1, fully compliant with ASME dimensional standards and designed for reliable performance in low-temperature service conditions.

These flanges are intended for critical pipeline connections, where strength, sealing reliability, and dimensional accuracy are essential for long-term operation.

Flange Types and Sizes Supplied

The delivered flanges cover multiple diameters, pressure classes, and connection requirements, supporting both main pipeline runs and isolation points:

Blind Flanges (RF)

36” Class 150, RF – ASME B16.47 Series A

20” Class 600, RF – ASME B16.5

Welding Neck Flanges (RF)

36” Class 150, SCH XS – ASME B16.47 Series A

30” Class 150, SCH XS – ASME B16.47 Series A

16” Class 150, SCH XS – ASME B16.5

20” Class 600, SCH 40 – ASME B16.5

16” Class 600, SCH XS – ASME B16.5

The combination of large-diameter flanges (up to 36 inches) and high-pressure Class 600 flanges ensures flexibility for different pipeline sections and operating conditions.

Material Grade and Applicable Standards

All flanges were produced using ASTM A350 LF2 Class 1, a carbon steel grade widely specified for pipelines operating in cold climates.

Material: ASTM A350 LF2 Cl.1

Pressure Ratings: Class 150 & Class 600

Facing: Raised Face (RF)

Standards:

ASME B16.47 Series A (large diameter flanges)

ASME B16.5 (standard flanges)

ASTM A350 LF2 Class 1 offers excellent low-temperature toughness and mechanical stability, making it suitable for oil and gas pipeline systems in Central Asia.

Manufacturing and Quality Assurance

Each flange supplied by Haihao Group was manufactured under strict quality control procedures, including:

Dimensional inspection per ASME standards

Material verification and traceability

Surface finish and facing inspection

Clear marking for size, pressure class, and heat number

All products were carefully packed to protect the flange facing and ensure safe delivery to the Kazakhstan project site.

Trusted Flange Supplier for International Projects

With extensive experience supplying ASTM A350 LF2 welding neck flanges and blind flanges for overseas pipeline projects, Haihao Group continues to support customers with consistent quality, reliable delivery schedules, and full compliance with international standards.

Our flanges are widely used in oil and gas transmission pipelines, petrochemical facilities, and energy infrastructure projects, particularly where low-temperature performance and dimensional accuracy are critical.