Industrial Alloy Steel Lap Joint Flange 420mm ID
Lap joint flange made of non-stainless alloy steel, 420 mm ID, facilitating alignment and rotation in large piping. Meets HTS 7307.91.50.70 as a qualifying large flange of alloy steel. Used in desalination plants and heavy industry.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If non-flange cast fittings of similar material
Cast elbows/reducers classify separately from wrought flanges.
If considered unfinished pipe ends
Machining level determines fitting vs. raw tube classification.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Certify compatibility with stub ends via matching material grades in paperwork
• Measure ID at multiple points to account for tolerances in customs inspections
• Declare pressure class (e.g
• 150-2500#) to support industrial end-use claims
Related Products under HTS 7307.91.50.70
Alloy Steel Weld Neck Flange 400mm ID
A large weld neck flange made from alloy steel (non-stainless) with an inside diameter of 400 mm, designed for high-pressure piping systems in industrial applications. It falls under HTS 7307.91.50.70 due to its flange design, alloy steel composition excluding stainless, and inner diameter exceeding 360 mm. Commonly used in oil and gas pipelines for secure bolted connections.
Non-Stainless Alloy Steel Blind Flange 450mm ID
A blind flange of alloy steel (not stainless) featuring a 450 mm inside diameter, used to seal the end of large piping systems. Classified under HTS 7307.91.50.70 for its large ID, flange type, and specified steel alloy excluding stainless varieties. Ideal for maintenance shutdowns in petrochemical plants.
Alloy Steel Slip-On Flange 500mm ID
Slip-on flange constructed from non-stainless alloy steel with a 500 mm inside diameter, allowing easy installation over pipe ends via welding. This product matches HTS 7307.91.50.70 as a large-diameter flange of alloy steel other than stainless. Frequently employed in water treatment and power generation infrastructure.
Heavy Duty Alloy Steel Socket Weld Flange 380mm ID
Socket weld flange of non-stainless alloy steel boasting a 380 mm inside diameter for high-integrity joints in demanding environments. Fits HTS 7307.91.50.70 criteria for large alloy (non-SS) flanges. Suited for refineries and offshore platforms.
Alloy Steel Raised Face Flange 600mm ID
Raised face flange from alloy steel (excluding stainless) with 600 mm inside diameter, providing superior gasket sealing in large bore systems. Classified precisely under HTS 7307.91.50.70 for its dimensions and material. Essential for steam lines in power plants.
Alloy Steel Long Neck Flange 550mm ID
Long neck flange of alloy steel (non-stainless) with 550 mm inside diameter, offering extended hub for reduced stress in high-pressure apps. Falls under HTS 7307.91.50.70 for large ID alloy flanges. Common in fertilizer production lines.