GB/T 9443-2019Steel and iron castings—Liquid penetrant inspection (English PDF)

Foreword

This Standard is identical to ISO 4987.1992 "Steel castings - Penetrant inspection"

(English edition).

This Standard equivalently translates ISO 4987.1992.

Foe ease of use, the following editorial changes are made.

— "This International Standard" is modified to be " this Standard";

— "." is used as decimal point to replace the decimal-comma ",";

— Introduction, as required by GB/T 1.1-2000, is inserted into Chapter 2.

This Standard replaces GB/T 9443-1988 "Methods of liquid penetrant inspection and

classification of indication for steel castings".

The main differences between this Standard and GB/T 9443-1988 are as follows.

— Scope is added (refer to Chapter 1);

— Normative references is added (refer to Chapter 2);

— Penetrant inspection condition is amended (Chapter 1 in 1988 edition; Chapter 3 in

this edition);

— Inspection method is amended (Chapter 2, Chapter 3, Chapter 4, Chapter 5 and

Chapter 7 in 1988 edition; Chapter 4 in this edition);

— Acceptance requirement is amended (clause 6.1, clause 6.2 and clause 6.3 in 1988

edition; Chapter 5 in this edition);

— Interpretation of results is amended (clause 6.4 and clause 6.5 in 1988 edition;

Chapter 6 in this edition);

— Purchase order list is added (refer to Chapter 7);

— Post-examination cleaning procedure is added (refer to Chapter 8);

— Annex A, annex B and annex C are added;

— Quality level illustration is adjusted and modified (Annex A in 1988 edition and

Annex D in this edition).

The annex A, annex B, annex C and annex D of this Standard are informative.

This Standard was proposed by China Machinery Industry Federation

This Standard shall be under the jurisdiction of National Technical Committee 54 on

Foundry of Standardization Administration of China (SAC/TC 54).

Drafting organization of this Standard. Shenyang Research Institute of Foundry.

Main drafters of this Standard. Li Xingjie, Zhang Zhaoqian, and Zhang Zhen.

Previous edition replaced by this Standard is as follows.

— GB/T 9443-1988.

Penetrant testing for steel castings

1 Scope

This Standard specified the penetrant inspection method for surface discontinuity

acceptance criteria when inspection procedure is stipulated in contract according to the

requirement of purchaser.

This Standard is applicable to penetrant inspection for steel castings produced by using

different kinds of casting method.

NOTE. It should be remembered that liquid penetrant inspection, like all methods of

non-destructive inspection, forms part of an overall or special assessment which is defined in

the contract.

2 Normative references

The articles contained in the following documents have become part of this Standard

when they are quoted herein. For the dated documents so quoted, all the modifications

(excluding corrections) or revisions made thereafter shall not be applicable to this

Standard. For the undated documents so quoted, the latest editions shall be applicable to

this Standard.

GB/T 18851.1 Non-destructive testing - Penetrant testing – Part 1.General principles

(GB/T 18851.1-2005, ISO 3452.1984, IDT)

GB/T 18851.5 Non-destructive testing - Penetrant testing – Part 5.Means of

verification (GB/T 18851.5-2005, ISO 3453.1984, IDT)

3 Conditions of liquid penetrant inspection

6 Interpretation of results

7 Order

The enquiry and/or order shall specify the following points.

a) the parts of castings and percentage of castings to be inspected (see clause 3);

b) the manufacturing stage(s) at which the inspection is to be carried out, as agreed

between the parties concerned (see clause 3);

c) the surface condition for the areas to be inspected (see 4.3);

d) the type of discontinuity indication and the severity level for each part of casting to

be inspected (see clause 3 and 5.2);

e) the qualification of the operators carrying out the inspection (see 4.2).

8 Additional test for cleaning after inspection

The requirements given in GB/T 18851.1 are also appropriate to this Standard.

Annex B

(Informative)

Liquid penetrant examination test method — Specific requirements for cast steels

B.1 The halogens and sulfur content of the products employed shall be less than 1 %.

B.2 The impregnation time shall be not less than that recommended by the penetrant

manufacturer.

B.3 The temperature of application shall be between 10 °C and 50 °C.

B.4 Rinsing with water shall be performed at pressures below 0.2 MPa and the water

temperature shall be less than 40 °C.

B.5 Drying shall be carried out with clean and "dry" air at pressures below 0.2 MPa and

at a temperature below 70 °C.

B.6 The development time is generally between 15 min and 30 min.

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