GB/T 13075-2016Periodic inspection and evaluation of welded steel gas cylinders (English PDF)

Foreword

This Standard was drafted as per the rules specified in GB/T 1.1-2009. This Standard replaced GB 13075-1999 Periodic Inspection and Evaluation of Welded Steel Gas Cylinders. Compared with GB 13075-1999, this Standard has the major changes as follows:

--- Applicable scope of the standard.

a) Change the pressure of hydraulic test no greater than 7.5MPa into nominal working pressure no greater than 10MPa (gauge pressure);

b) Change the nominal capacity from the original 10L~1000L into 1L~1000L;

c) Add the containing gases of applicable compressed gases or mixed gases;

d) Change the applicable gas cylinder types into inapplicable internal filled gas cylinders, fire extinguishing cylinders, and liquefied petroleum gas steel cylinders designed and manufactured as per GB 5842;

--- Add the following standards in the normative references. NB/T 47013.2, NB/T 47013.4, NB/T 47013.5, TSG Z7001;

--- Add requirements for inspection agency. the inspection agency performing the inspection against the gas cylinders shall meet the requirements of GB 12135; and shall be approved by national special equipment safety supervision and management department as per TSG Z7001;

--- Modify the requirements for residual wall-thickness after the treatment of knock injuries, scratches and corrosion defects; confirm the residual wall-thickness shall be less than design wall-thickness of cylinder body;

--- Modify the requirements for capacity determination;

--- Confirm the repairmen against the cylinder valve is not allowed;

--- Add inspection against the fusible alloy plugs;

--- Add the requirements for periodic inspection report of gas cylinders;

--- Add the requirements for treatment mode of rejected gas cylinders;

1 Scope

GB/T 13075-2016 is the Chinese national standard on periodic inspection and evaluation of welded steel gas cylinders, in the field of fluid systems and general-purpose components. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 24 February 2016 by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of China, and has been in force since 1 September 2016. Classification: ICS 23.020.30, CCS J74. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This Standard specifies the basic method sand technical requirements for periodic inspection and evaluation of welded steel gas cylinders (hereinafter refers to as "gas cylinder"). This Standard is applicable to the periodic inspection and evaluation of welded steel gas cylinders that can contain compressed gases, low-pressure liquefied gases or mixed gases, and can be re-filled with nominal working pressure no greater than 10MPa (gauge pressure), nominal capacity 1L~1000L. This Standard is not applicable to the internal filled gas cylinders, fire extinguishing gas cylinders, and liquefied petroleum gas cylindered designed and manufactured as per GB 5842.

2 Normative References

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.

GB 5100 Welded Steel Gas Cylinders

GB 7144 Coloured Cylinder Mark for Gases

GB 8335 Special Threads for Gas Cylinders

GB/T 8336 Special Thread Gauges for Gas Cylinders

GB/T 9251 Methods for Hydrostatic Test of Gas Cylinders

GB/T 10878 Special Taps of Taper Thread for Gas Cylinders

GB 12135 Technological Specifications for Periodic Inspection Station of Gas Cylinders

GB/T 12137 Methods for Leakage Test of Gas Cylinders NB/T 47013.2 Nondestructive Testing of Pressure Equipment - Part 2. Radiographic Testing NB/T 47013.4 Nondestructive Testing of Pressure Equipment - Part 4. Magnetic Particle Testing NB/T 47013.5 Nondestructive Testing of Pressure Equipment - Part 5. Penetrant Testing TSG R0006 Gas Cylinder Safety Specification TSG Z7001 Accreditation Criteria on Special Equipment Inspection Agencies

3 Inspection Agency, Inspection Cycle and Inspection

3.1 Inspection agency The inspection agency performing the periodic inspection of gas cylinder shall meet the requirements of GB 12135; and shall be approved by national special equipment safety supervision and management department as per TSG Z7001.

3.2 Inspection cycle The gas cylinder containing non-corrosive high-purity gases with purity greater than or equal to 99.999% shall be inspected once every 5 years; the gas cylinder containing the gas generated corrosive role against the cylinder materials, submerge gas cylinder, as well as gas cylinder in constant contact with seawater shall be inspected once every 2 years; while the gas cylinder containing other gases shall be inspected once every 3 years. The inspection cycle of gas cylinder containing mixed gas shall be subject to the gas with shortest inspection cycle. In the course of use, if the cylinder is found to have serious corrosion, damage or dubious safety and reliability problems, the inspected shall be performed in advance. The gas cylinder that has been stored in the warehouse or shutdowns for more than one inspection cycle, it shall be re-inspected before starting to use.

3.3 Inspection items The periodic inspection items of gas cylinders include appearance inspection, cylinder- mouth thread inspection, internal inspection, wall-thickness determination, valve seat and plug seat inspection, capacity determination, hydrostatic test, inspection of cylinder valve, safe pressure-relief device and blind plug, as well as air tightness test.

5.5.1 For the gas cylinders with residual wall-thickness on the positions where there is independent spot corrosion, linear corrosion, local corrosion, and general corrosion is less than design wall-thickness, they shall be rejected.

5.5.2 For the gas cylinders with corrosion depth and range can't be confirmed due to the severe corrosion, they shall be rejected.

5 Appearance Inspection and Evaluation...