ASME标准渗透工艺规程

ASME标准渗透工艺规程

ASME标准渗透探伤通用工艺规程

POE0702-SPC-ST-02

Specification for Supplying Line Pipe for

Submarine Pipelines

Rev. B

Employer :

SONILS LDA Engineer :

SCOTT WILSON LTD, UK Contractor : CHINA HARBOUR ENGINEERING CO., LTD.

Subcontractor: PETRO-OFFSHORE ENGINEERING Issue Status

ASME标准渗透工艺规程

1 GENERAL .............................................................................................................................. 3 2 PERSONNEL ......................................................................................................................... 3 3 PENETRANT MATERIALS ................................................................................................ 3 4 EXAMINATION PROCEDURE .......................................................................................... 4

4.1

4.2

4.3

4.4

4.5

4.6

4.7

4.8 EXAMINATION FLOW CHART AS SHOWN IN FIG.4.1. ........................................................... 4 SURFACE PREPARATION ..................................................................................................... 4 PRECLEANING ..................................................................................................................... 5 PENETRANT APPLICATION .................................................................................................. 5 EXCESS PENETRANT REMOVAL .......................................................................................... 5 DEVELOPER APPLICATION .................................................................................................. 6 INTERPRETATION ................................................................................................................ 6 POST-CLEANING ................................................................................................................. 6 5 EVALUATION OF INDICATIONS .................................................................................... 7 6 ACCEPTANCE STANDARDS ............................................................................................. 7 7 THE REPAIRED AREA SHALL BE REEXAMINED ACCORDING TO THE

ORIGINAL EXAMINATION PROCEDURE. .......................................................................... 8 8 REPORT ................................................................................................................................. 8 9 REPORT FORM，SEE PAGE 8 OF 8. ............................................................................... 8

10..................................................................................................................................................... 8

ASME标准渗透工艺规程

1 General

1.1 This procedure is applied to dye liquid penetrant examination of metal material and weldment for ASME Code items.

1.2 This procedure is only suitable for detecting the defects that are open to the surface of material or weldment.

1.3 This procedure shall be demonstrated to the satisfaction of the AI prior to implementation.

2 Personnel

2.1 The personnel engaged in the penetrant examination shall be qualified and certified in accordance with the requirement of NJBST Co., Ltd.’s“Written Practice for NDE Personnel Training Examination, Qualification and Certification”(No.:QCD-011).

3 Penetrant Materials

3.1 The penetrant materials is intended to include all penetrants, solvents or cleaning agents, developers, etc, used in the examination process.

3.2 The liquid penetrant examination materials shall be designated and recommended, as shown in Table 3.2. The materials used for examination shall be the same type. Intermixing of penetrant materials from different families or different manufacturers is not permitted.

Table 3.2

3.3 When examining austenitic stainless steel or titanium, all materials shall be analyzed individually for chlorine and fluorine content in accordance with the procedure shown in T-641(b) of ASME Code Section V. The total chlorine plus fluorine content shall not exceed 1%of the residue by weight. The certificate of compliance from manufacturer shall be obtained.

ASME标准渗透工艺规程

3.4 When examining nickel base alloys, all materials shall be analyzed individually for sulphur content in accordance with the procedure shown in T-641(a) of Section V.The sulphur content shall not exceed 1%of the residue by weight. The certificate of compliance from manufacturer shall be obtained.

4 Examination Procedure

4.1 Examination Flow Chart as shown in Fig.4.1.

Fig. 4.1

4.2 Surface Preparation

Prior to all penetrant examination, the surface to be examined and all adjacent areas within at least 1in. (25.4mm) shall be dry and free of dirt, grease,lint, scale, welding

ASME标准渗透工艺规程

flux, weld spatter， paint， oil and other extraneous matter. If necessary, surface shall be prepared by grinding or machining.

4.3 Precleaning

4.3.1 The areas to be examined and adjacent areas within at least 1in. (25.4mm) shall be cleaned using cleaning agent before the penetrant is applied.

4.3.2 After cleaning, drying of the surface to be examined shall be accomplished by normal evaporation or with forced air, as appropriate. The minimum drying time shall ensure that the cleaning solution has evaporated prior to application of the penetrant.

4.4 Penetrant Application

4.4.1 The penetrant may be applied on the surfaceof workpieces to be examined by any suitable means such as dipping, brushing or spraying.

4.4.2 The temperature of the penetrant and the surface to be examined shall not be below 500F (100C) nor above 1250F(520C) throughout the examination p …… 此处隐藏：7987字，全部文档内容请下载后查看。喜欢就下载吧 ……