JIS B2311 SGP 45° and 90° SGP elbows JIS B2311 PIPE FITTINGS
We are a professional manufacturer of JIS B2311 SGP pipe fittings in China, supplying high-quality butt weld fittingsfor general piping systems.
Our products include:
- 45° Elbow
- 90° Elbow
- 180° Bend
- Tee (Straight & Reducing)
- Reducer (Concentric & Eccentric)
- Pipe Cap
Available for water, gas, and industrial piping systems.
What is JIS B2311
JIS B2311 is a Japanese Industrial Standard covering steel butt-welding pipe fittings for ordinary use.
It is commonly used with:
- JIS G3452 – Carbon steel pipes
- JIS G3457 – Arc welded carbon steel pipes
JIS B2311 is a Japanese Industrial Standard (JIS) specification,JIS B231 covers steel butt-welding pipe fittings for ordinary use.
SGP: SGP stands for “Standard for General Piping.” It is a classification within the JIS standards system that pertains to general-purpose steel pipes used in ordinary piping applications.
Materials : The fittings to this standard are made from materials in accordance with JIS G3452.
Pressure Ratings : The fittings are free from leakage at hydrostatic pressure up to a maximum of 2.5 MPa.
Welding End Preparations : Bevel dimensions and tolerances conform to those shown in the diagram. Fittings with a basic thickness below 4 mm have plain unbeveled ends.
Suitable for low to medium pressure applications.
What is SGP
SGP (Standard for General Piping) refers to carbon steel used in general piping systems.
👉 Typical applications:
- Water supply
- Gas pipelines
- Building piping
- Industrial piping
Material & Standards
JIS B2311 SGP fittings comply with:
- JIS B2311 – Fittings standard
- JIS G3452 – Material standard
- JIS G3457 – Pipe standard
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| SGP | ≥290 | — | 30 / 25 |
| PY400 | ≥400 | ≥255 | 18 |
Notes:
- For thickness < 8 mm → elongation decreases 1.5% per mm
- Not applicable for sizes < 32A
Pipings using carbon steel pipes for ordinary piping specified in JIS G 3452 and pipings using arc welded carbon steel pipes for piping specified in JIS G 3457.
JIS B2311 Steel Butt-Welding Pipe Fittings for Ordinary Use
JIS G3452 Carbon Steel Pipes for Ordinary Piping
JIS G3457 Arc Welded Carbon Steel Pipes
| Steel Grade | Chemical Composition % | Tensile | Yield | Elongation % (1) | |||
| C | P | S | Strength | Point | Longitudinal | Transverse | |
| Max | N/mm2 Min | Min | Min | ||||
| SGP | – | 0.040 | 0.040 | 290 | – | 30 (2) | 25 (2) |
| PY400 | 0.25 | 0.040 | 0.040 | 400 | 255 | – | 18 |
NOTES:
(1) Values specified are for wall thickness 8mm and over. For each 1mm decrease in wall thickness below 8mm, a deduction of 1.5% for both longitudinal and transverse from the values shown above is permitted.
(2) Value not applicable to NPS below 32A.
JIS B2311 SGP 45° elbow / JIS B2311 SGP90° elbow /JIS B2311 SGP180° bend / JIS B2311 SGP cap/JIS B2311 SGP Reducer/JIS B2311 SGPTee.
JIS B2311 SGP Elbow Dimensions
JIS B2311 SGP ELBOW DIMENSION
90° Elbow (Long Radius)
👉 Radius (R) ≈ 1.5 × NPS
| Size (A) | OD (mm) | Center to End (mm) |
|---|---|---|
| 50A | 60.5 | 76 |
| 80A | 89.1 | 114 |
| 100A | 114.3 | 152 |
| 150A | 165.2 | 229 |
Applications
JIS B2311 SGP fittings are widely used in:
- Water supply systems
- Gas pipelines
- Industrial piping
- Building piping systems
Why Choose Us
- Professional manufacturer in China
- Full range of JIS B2311 SGP fittings
- Strict quality control
- Competitive pricing
- Fast delivery
FAQ
Q1: What is the difference between JIS B2311 and JIS B2312?
JIS B2311 is for ordinary pressure, while JIS B2312 is for higher pressure applications.
Q2: What does SGP mean in JIS standards?
SGP stands for Standard for General Piping.
