TSG D7005-2018: Periodic inspection regulation for industrial pressure piping

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Scope

1.1 Purpose
In order to regulate the periodic inspection of in-use industrial pressure piping,
in accordance with the “Special equipment safety law of the People’s Republic
of China”, “Special equipment catalogue”, the provisions of related safety
technical specifications, this Regulation is hereby formulated.
1.2 Scope of application
This rule applies to the periodic inspection of in-use industrial pressure piping
(hereinafter referred to as piping) (Note 1-1, Note 1-2).
1.3 Periodic inspection of piping
The periodic inspection of piping, that is, the comprehensive inspection, refers
to the conformity verification activities by the special equipment inspection
organizations (hereinafter referred to as inspection organization) against the
safety status of the piping, based on a certain time period, according to the
provisions of this Regulation, relevant safety technical specifications, the
relevant standards.
Periodic inspections shall be conducted on the basis of annual inspection.
1.4 Work procedures of periodic inspection
The general procedures for periodic inspection work include the preparation of
inspection plans, preparation before inspection, implementation of inspection,
treatment of defects and problems, summary of inspection results, issuance of
inspection reports, etc.
1.5 Grade of safety status of periodic inspection
The safety status of the periodic inspection of piping is divided into 4 levels.
grade 1, grade 2, grade 3, grade 4.The inspection organization shall, according
to the conditions of periodic inspection, assess the grade of safety status of
piping in accordance with the provisions of clause 3 of this Regulation.
1.6 Cycle of periodic inspection
1.6.1 General provisions
Generally, the piping is periodically inspected for the first time within 3 years
after it is put into use. The subsequent inspection cycle shall be determined by
the inspection organization according to the grade of safety status of piping
according to the following requirements.
(1) The grade of safety status is grade 1 or grade 2.The piping of grade GC1
and GC2 are inspected generally once not more than 6 years; The piping
of grade GC3 is inspected once not more than 9 years;
(2) The piping of grade 3 safety status is inspected generally once not more
than 3 years. During the period of use, the user organization shall take
effective monitoring measures on the piping;
(3) For the piping of grade 4 safety status, the user organization shall treat
the piping defects; otherwise, such piping shall not be used any more.
1.6.2 Cycle of risk-based inspection (RBI)
The periodic inspection of piping may use the risk-based inspection. The
inspection cycle can be determined by the following methods.
1.6.3 Special provisions
1.6.3.1 Shortening of inspection cycle
For piping under one of the following conditions, it shall appropriately shorten
the periodic inspection cycle.
(1) When the corrosion of the piping material by the medium or the
environment is unknown, or the thickness of piping reduces abnormally
due to corrosion;
(2) It has a tendency to cause environmental cracking or mechanical
damage, meanwhile cracking has been found (Note 1-3);
(3) When the use medium changes, which may cause deterioration of
corrosion;
(4) When the material deterioration is more obvious;
(5) The user organization has not conducted an annual inspection in
accordance with Appendix A of this Regulation;
(6) When the settlement of foundation causes the deflection of the piping,
which affects safety;
(7) When it suspects, in the inspection, that there are other factors which
may affect safety.
Note 1-3.Environmental cracking includes mainly stress corrosion cracking,
hydrogen induced cracking, etc. Mechanical damage mainly includes various
fatigues, high-temperature creep, etc. See GB/T 30579 “Damage modes
identification for pressure equipment”.
1.6.3.2 Failure to carry out periodic inspections on schedule
For piping that has not been periodically inspected on schedule due to special
circumstances, the user organization shall issue the written statement to detail
the conditions. After being approved by the responsible person of safety
management of the user organization, agreed by the inspection institute which
undertook the previous periodic inspection (except for the delay of initial
inspection), the inspection can be delayed. Otherwise, the user organization
may put forwards to application, which will be processed in accordance with the
provisions of clause 2.6 of this Regulation.
For piping that are not periodically inspected on schedule, the user organization
shall take effective monitoring and emergency management measures.
1.7 Obligation of user organization
The user organization shall fulfill the following obligations.
(1) Formulate a periodic piping inspection plan; apply to periodic inspection
to the inspection institute 1 month before the valid period of the periodic
inspection of the piping;
(2) Do well in inspection coordination and safety supervision; be responsible
for the authenticity of the relevant information provided;
(3) For the defects and problems which are found in the inspection, propose
the treatment or rectification measures, be responsible for their
implementation, feedback the treatment or rectification conditions, in
writing, to the inspection institute.
1.8 Duties of inspection institute and inspectors
(1) The inspection institute shall perform the inspection of the piping in
accordance with the approved inspection scope, be responsible for the
authenticity, accuracy and validity of the inspection report (Note 1-4);
(2) Personnel engaged in the inspection and testing of piping shall obtain
the corresponding certificate of special equipment inspection and testing
personnel, make registration in accordance with relevant provisions;
(3) After the inspection institute receives the periodic inspection application
from the user organization, it shall conduct the inspection in time;
(4) The inspection institute shall conduct periodically safety training for the
inspection work of the testing and inspection personnel, retain the
training records.
Note 1-4.Authenticity means that the report is based on objective facts and
does not make false evidence. Accuracy means that the accuracy of the test
data involved in the report meets the relevant requirements. Effectiveness
means that the qualification of the inspection institute and the inspector
complies with requirements; the measuring equipment, instrument and tools
which are used for inspection and testing are within the valid period of the
calibration standard; the basis for the testing is legal; the report’s approval
procedure complies with requirements.
1.9 Application of new techniques
If new techniques and new assessment methods are adopted in the inspection,
which are inconsistent with the requirements of this Regulation and the related
safety technical specifications, or if this Regulation and related safety technical
specifications do not make any requirements, or it may have major impact onto
the safety performance, the relevant organization shall provide the relevant
basis, data, result of study and test as well as such technical data as the testing
and assessment report, make application to the General Administration of
Quality Supervision, Inspection and Quarantine (hereinafter referred to as the
AQSIQ), which will entrust the relevant technical institute to perform technical
review. The results of the technical review can only be put into application after
being approved by AQSIQ.
1.10 Informationalized management
The user organization, inspection, and testing institute of the piping shall,
according to the informationalized work provisions of special equipment, timely
upload the required inspection data to the user registration and inspection
information system of special equipment.

Basic Data

Standard ID	TSG D7005-2018 (TSGD7005-2018)
Description (Translated English)	Periodic inspection regulation for industrial pressure piping
Sector / Industry	Special Equipment Industry Standard
Classification of Chinese Standard	C78
Word Count Estimation	35,321
Date of Issue	2018-01-26
Date of Implementation	2018-05-01
Regulation (derived from)	AQSIQ Announcement No. 17 of 2018
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China