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  • Threaded Flange | Female Thread Connection – Weld‑Free Installation for Hazardous Areas & Frequent Disassembly
    Weld‑free design – Internal threads (NPT / BSPT / BSPP) machined into the flange; directly screws onto threaded pipe – no welding equipment needed
    Ideal for hazardous areas – Perfect for oil fields, chemical plants, gas lines where open flame or hot work is prohibited
    Small‑bore, high‑pressure capability – Typically used for NPS 2" and below; pressure rating up to Class 1500
    Easy disassembly – Threaded connection allows quick removal for system modification, maintenance or replacement
    Full material selection – Carbon steel, stainless steel, alloy steel for corrosive, high‑temp or low‑temp services
    Multiple facing types – RF, FF, RTJ, etc.; manufactured to ASME B16.5 / B16.47 or EN 1092‑1
  • Carbon/Stainless Steel Raised Face Flange RF ANSI/GB Standard Welded Pipe Flange for Industrial Pipeline
    Carbon steel / stainless steel options, forged for high strength and corrosion resistance
    Raised face (RF) design for enhanced gasket compression and leak-proof sealing
    Compliant with ANSI/ASME B16.5, GB, DIN, JIS international standards
    CNC machined sealing grooves for uniform gasket pressure distribution
    Full range of sizes & pressure ratings (DN15~DN2000, Class150~2500)
    100% dimensional & visual inspection, with mill test certificates available
  • Carbon/Stainless Steel Weld Neck Flange WN High Pressure Forged Butt Weld Pipe Flange ANSI/GB Standard
    Long tapered hub – Hub thickness gradually transitions to pipe wall, significantly reducing stress concentration at the flange root
    Butt weld connection – Flange welded to pipe with beveled ends; weld can be radiographed, strength equals that of base material
    Excellent sealing performance – High rigidity, minimal flange rotation under bolting force, ideal for high pressure, high temperature and cyclic conditions
    Full‑bore flow path – Flange bore matches pipe I.D. – no turbulence, no dead space, reduces pressure drop and erosion/corrosion
    Wide pressure coverage – From Class 150 to Class 2500, sizes NPS 1/2″ up to 48″ and above
    Full material & standard range – Carbon steel, stainless steel, alloy steel; ASME B16.5 / B16.47, EN 1092‑1, GB/T 9115, etc.
  • Carbon Steel 45° Elbow (LR/SR) | Butt Weld Fitting for Gradual Pipeline Direction Change
    45° Bend Angle: Gradual direction change — lower pressure drop than 90° elbows.
    Long Radius (LR) or Short Radius (SR): LR (1.5D) standard; SR (1.0D) for tight spaces.
    Seamless or Welded Construction: Seamless for high pressure; welded for large diameters.
    ASTM A234 WPB / WPC: Standard carbon steel material for high temperature service.
    Beveled Ends for Butt Weld: Prepares for easy field welding.
    Full Traceability: Heat number stamped on each fitting.
  • Carbon Steel Concentric Reducer | Symmetrical Taper for Vertical Pipe Size Transition
    Concentric Design: Symmetrical taper — pipe centerline remains straight.
    Vertical Lines Only: Recommended for vertical pipelines or pump suction (flat top eccentric required for horizontal).
    Seamless or Welded: Seamless up to 24″; welded for larger diameters.
    ASTM A234 WPB: Standard carbon steel material.
    Smooth Internal Transition: No sharp edges — minimizes turbulence.
    Beveled Both Ends: Ready for butt welding to larger and smaller pipe.
  • Carbon Steel Bull Plug (Hex Head / Round Head) | Threaded End Closure for Small Bore Lines
    Threaded Connection: NPT or BSP threads — screws into female threaded fitting.
    Hex Head or Round Head: Hex for wrench tightening; round for low torque applications.
    Solid Forged Construction: No porosity — stronger than cast plugs.
    ASTM A105: Forged carbon steel for high pressure service.
    NPT Threads Standard: Tapered threads provide pressure-tight seal with PTFE tape.
    Low Cost: Economical way to close small threaded ports.
     
  • Carbon Steel Cross (4-Way Tee) | Four-Port Butt Weld Fitting for Pipeline Intersections
    Four Openings: Two on run, two on opposite branches — all butt weld connections.
    Equal Cross: All four ports same size (standard).
    Reinforced Intersections: Extra wall thickness at all three branch intersections.
    ASTM A234 WPB: Carbon steel for moderate temperature.
    Seamless up to 12″: Larger sizes fabricated from welded pipe.
    Saves Space: One cross replaces two tees and a spool piece
  • Carbon Steel Reducing Tee | Branch Connection with Smaller Branch Size
    Reducing Tee: Branch opening is smaller than the main run.
    One Fitting Replaces Tee + Reducer: Saves welding and space.
    Butt Weld Connections: Beveled ends on all three ports.
    Reinforced Branch: Extra thickness at the reducing intersection.
    ASTM A234 WPB: Standard carbon steel.
    Any Run/Branch Combination: Custom size reductions available.
  • Carbon Steel Equal Tee | Straight Branch Connection for Same Size Pipelines
    Equal Tee: All three openings are the same size.
    Butt Weld Connections: Beveled ends for welding to main pipe and branch.
    Reinforced Branch: Extra wall thickness at intersection for strength.
    ASTM A234 WPB: Carbon steel for moderate temperature service.
    Seamless up to 24″: One-piece construction for high integrity.
    Full Pressure Rating: Branch rated same as run.
HEBEI GAOVISTA IMP & EXP TRADING CO., LTD
We specialize in supplying a full range of pipeline products, including carbon steel and stainless steel flanges, industrial valves, ductile iron valves, various pipe fittings and pipeline accessories.

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