CJ/T 151-2016 in English

Background of Standard Revision and Core Changes

Compared with the 2001 version, the 2016 version of the standard has undergone 5 major technical upgrades:

Analysis of key performance indicators

1. Material properties

The standard stipulates that 5 types of stainless steel, including 022Cr17Ni12Mo2 (S31603):

• Density difference: 7.77-8.00 kg/dm³ affects theoretical weight calculation
• Corrosion resistance level: S11972 is not recommended for gas pipelines

2. Mechanical properties requirements

Based on 022Cr17Ni12Mo2 (S31603)

• Density difference: 7.77-8.00 kg/dm³ affects theoretical weight calculation
• Corrosion resistance level: S11972 is not recommended for gas pipelines

3.>06Cr19Ni10（S30408）as an example:

• Tensile strength ≥520 MPa
• Specified non-proportional extension strength ≥205 MPa
• Elongation after fracture ≥35%

---

Key points for engineering application implementation

1. Selection suggestions

Select materials according to the medium type:

• Drinking water system: S30403/S31603 is preferred
• Gas pipeline: S11972 material is prohibited

2. Acceptance matters

Mandatory inspection items include:

1. Eddy current flaw detection (when replacing hydraulic test)
2. 240 hours salt spray test
3. Intergranular corrosion detection