ASTM A350 GR LF2 Long Welding Neck Flange According To ASME B16.5

ASTM A350 GR LF2 Long Welding Neck Flange according to ASME B16.5 is an industrial product with a special structural design in flange connectors. Its neck height is significantly higher than that of ordinary butt welded flanges, mainly by extending the neck structure to enhance stiffness and load-bearing capacity
This product is widely used in high-temperature and high-pressure working environments in the fields of petrochemicals, pressure vessels, pharmaceutical machinery, etc

structural characteristics
ASTM A350 GR LF2 Long Welding Neck Flange according to ASME B16.5 achieves structural optimization by extending the neck height, and the neck extension can provide additional support, effectively reducing the transmission of pipeline torque
Its structural design can reduce the stress concentration factor and significantly improve the stability of the flange body and the connecting part of the connecting pipe
Compared to standard neck welded flanges, the axial load-bearing capacity is increased by 15% -20%

manufacturing process
The production process includes four key processes: integral forging of steel billets (temperature controlled at 1150 ℃± 50 ℃), precision machining with CNC lathes (dimensional tolerance ± 0.05mm), and ultrasonic testing (in compliance with ASME V standards)

The commonly used materials for Long Welding Neck Flange mainly include the following categories:
carbon steel
Carbon steel is one of the commonly used materials for Long Welding Neck Flange, with high strength and wear resistance, suitable for general industrial pipeline systems
Its price is relatively low, but its corrosion resistance is poor
stainless steel
Stainless steel is widely used due to its excellent corrosion resistance, and common grades include:
304/304L: Universal stainless steel, suitable for media with low corrosiveness, working temperature range of about -20 ℃~200 ℃
316/316L: containing molybdenum element, with stronger corrosion resistance, it is the preferred material for high temperature conditions (above 300 ℃)
321: Adding titanium element, good resistance to intergranular corrosion, suitable for high temperature applications below about 500 ℃
310S: High alloy austenitic stainless steel with excellent high-temperature oxidation resistance, capable of withstanding continuous working temperatures up to 1000 ℃
alloy steel
Alloy steel flanges have the characteristics of high temperature and high pressure resistance, and are suitable for special working conditions
Titanium and titanium alloys
Titanium high neck flanges (such as TA1, TA2, TC4, etc.) have excellent corrosion resistance and are suitable for harsh environments such as chemical and marine industries