The JIS B2311 SGP Reducer is a standard carbon steel fitting designed for low-pressure "Ordinary Piping" (SGP). Available in Concentric (symmetric) and Eccentric (flat-sided) types, these reducers facilitate pipe size transitions in water, air, and gas lines. Concentric types are used for vertical runs, while Eccentric types prevent air pockets in horizontal suction lines. Produced via cold or hot forming, they provide a reliable, cost-effective butt-welding solution for general building services and industrial utility lines.
Technical Attributes: JIS B2311 SGP Reducer
Design Standard,JIS B2311 (Steel Butt-Welding Pipe Fittings)
Material Grade,JIS G3452 SGP (Carbon Steel for Ordinary Piping)
Fitting Types,Concentric (CR) or Eccentric (ER)
Manufacturing,Seamless or Welded (Depends on Size)
End Connection,Butt Welding (BW)
End Preparation,Square Cut or Beveled (Matches SGP Wall)
Size Range (A),15A to 600A (1/2" to 24")
Outside Diameter,Matches JIS G3452 OD Standards
Wall Thickness,SGP Standard (Typically 2.3mm to 9.5mm)
Tensile Strength,≥290 MPa
Elongation,≥30%
Testing Standard,"Visual, Dimensional, and Pressure Proof"
Pressure Rating,Low Pressure (Typically ≤1 MPa)
Surface Treatment,"Black Paint, Galvanized, or Anti-rust Oil"
Working Temp,0∘C to +350∘C (Standard range)
Carbon Content,Controlled for general weldability
Certification,Mill Test Certificate (MTR)
Primary Markets,Japanese Industrial & Building Services
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