JIS G3455 Steel Pipe Grade STS 480

Specifications

JIS G3455 Carbon Steel Pipes for High Pressure Service

1. Scope
This Japanese Industrial Standard specifies the carbon steel pipes, hereinafter referred to as the "pipes" , used for high pressure service at an approximate maximum temperature
of 350°
Remarks
1.1 With the previous agreement of the manufacturer, the purchaser may designate part or all of the supplementary quality requirements Z2, Z3 ,Z4 and Z5 specified in this text.
Appendix Z 2: Elevated Temperature Yield Point or Proof Stress
Appendix Z 3: Ultrasonic Examination
Appendix Z 4: Eddy Current Examination
Appendix Z 5: Charpy Impact Test
1.2 The units and numerical values given un { } in this Standard are based on the International System of Units (SI) and are appended for informative reference.
Further, the traditional units accompanied by numerical values in this Standard shall be converted to the SI units and numerical values on Jan. 1, 1991.

2. Grade and Designation
The pipe shall be classified into three grades and their letter symbols shall be as given in Table 1.

3. Method of Manufacture
Appearance shall be as follows:
3.1 The pipe shall be manufactured from killed steel by the seamless process
3.2 The pipe shall be subjected to the heat treatment specified in Table 5-1 of Table 5-2. The heat treatment other than those specified in Table 5-1 of Table 5-2 shall be agreed upon by the purchaser and the manufacturer. Table 2

3.3 When required by the purchaser, the pipe may be furnished with a bevel end.

4. Chemical Composition
The pipe shall be tested in accordance with 9.1 and the resulting ladle analysis values obtained shall conform to Table 3.

5. Mechanical Properties
5.1 Tensile Strength, Yield Point or Proof Stress and Elongation
The pipe shall be tested in accordance with 9.2 and the tensile strength, yield point of proof stress and elongation of the pipe obtained shall comply with Table 4.

6. Dimensions, Weight and Dimensional Tolerances
6.1 Dimensions and Weight
The outside diameter, wall thickness and mass of the pipe shall be as specified in Attached Table 5.
6.2 Dimensional Tolerances
The tolerances on the outside diameter, wall thickness and wall thickness deviation of the pipe shall conform to Table5.
In the case where the pipe length is designated, the value shall be the minimum length.

Table 5. Tolerances on Outside Diameter, Wall Thickness and Wall Thickness Deviation