JB/T 4734-2002Aluminium welded vessels (English PDF)

1.1

This standard is applicable to the atmospheric pressure vessels and the pressure vessels with design pressure no larger than 8MPa.

1.2

The design temperature range applicable to this standard shall be determined according to the allowable service temperature of aluminium products.

1.3

This standard is not applicable to the following various vessels .

a) Directly-fired vessels;

b) Vessels in the nuclear-energy plant;

c) Compression vessel chambers as the component parts of such motive mechanical equipments with rotation or back and forward motion (such as centrifugal pump shell, cylinder body of reciprocating pump, cylinder body of compressor, cylinder body of refrigerating machine, case of blower, wobbling drum of centrifuge, etc .);

d) Frequently-transpo11ed vessels;

e) Vessels with internal diameter be less than l 50mm (means width, height or diagonal line for the noncircular section, such as the diagonal line of rectangular or the major axis of ellipse);

f) Vessels requiring fatigue analysis.

1.4

For the compression components with structural dimension not being determined by this standard, the following methods may be adopted in the design of these compression components, but they shall be evaluated and approved by the National Technical Committee on Pressure Vessels of

Standardization Administration of China.

- - Stress analysis , including finite element method;

--Replication experiment analys is (such as experimental stress analysis and replication hydrau I ic pressure test);

--Comparison empirical design by sing such comparable structures that have been in service.

3.1

The design, manufacturing, inspection and acceptance of the vessels shall not only be in accordance with those specified in this standard, but also comply with the relevant laws and decrees and regulations issued by the State.

3.2 Qualifications and Responsibilities

3.2.1 Qualifications

3.2.1.1

The design and manufacturing organizations of the vessels shall be with sound quality management system. The design organization of pressure vessel shall hold the corresponding pressure vessel design approval letter and the manufacturing organization possess hold the pressure vessel manufacturing license.

3.2.1.2

The design and manufacturing of pressure vessels shall be under the superv1s1on of the pressure vessel safety supervision mechanism.

3.2.2 Responsibilities

3.2.2.1 Responsibilities of design organization

3.2.2.1.1

The design organization shall be responsible for the accuracy and integrity of the design document.

3.2.2.1.2

The vessel design documents shall at least include the design calculation book and design drawing.

3.2.2.1.3

The general design drawing of design pressure vessel shall be stamped with the seal for pressure vessel design qualification.

3.2.2.2 Responsibilities of manufacturing organization

3.2.2.2.1

The manufacturing organization shall manufacture in accordance with the requirements of the design drawing and can modify the original design only with the approval of the original design organization.

3.2.2.2.2

The inspection depm1ment of the manufacturing organization shall carry out vanous specific inspections and tests for the vessels according to the requirements of this standard and drawings during the manufacturing process or after the completion of vessels, propose the inspection rep011 and be responsible for the accuracy and integrity of the repo11.

3.2.2.2.3

The manufacturing organization shall at least have the following technical documents of each his vessel product for future reference. And the technical documents shall be kept for at least 7 years .

a) Manufacturing process drawing or fabrication dispatch;

b) Material supporting documents and material list;

c) Welding process records of the vessel;

d) Records on items for selection of manufacturer in this standard;

e) Inspection records during the manufacturing process and after the completion of the vessel;

f) Original design drawing and completion drawing of the vessel.

Note. Provided that the original design drawing is modified to form the completion drawing, it is treated that both the "original design drawing and completion drawing" are available .

3.2.2.2.4

After obtaining the confinnation of inspection organization on that the vessel quality meets the requirements of this standard and the drawings, the manufacturing organization shall fill in the product quality certificate and submit it to the user.

3.3 Scope of Vessel

The scope of vessel as specified in this standard refers to the enclosure and all the spare pa1ts connected to the enclosure as an entirety and shall be within the scope of 3.3.1~3.3.4 .

3.3.1

Connections between the vessel and the external pipe include.

a) The groove end face of the first pass of gilth joints with welded connection;

b) The end face of the first threaded connector with threaded connection;

c) The sealing surface of the first flange with flanged connection;

d) The first sealing surface of special connecting piece or pipe fitting connection.

3.3.2

Bearing heads,...