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JB/T 4730.4-2005

Chinese Standard: 'JB/T 4730.4-2005'
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JB/T 4730.4-2005English115 Add to Cart 0--15 minutes. Auto immediate delivery. Nondestructive testing of pressure equipments. Part 4: Magnetic particle testing [Quasi-Official / Academic version - scanned PDF, translated by Standard Committee / Research Institute in China] Obsolete JB/T 4730.4-2005

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Detail Information of JB/T 4730.4-2005; JB/T4730.4-2005; JBT 4730.4-2005; JBT4730.4-2005
Description (Translated English): Nondestructive testing of pressure equipments - Part 4: Magnetic particle testing
Sector / Industry: Mechanical & Machinery Industry Standard (Recommended)
Classification of Chinese Standard: H26
Classification of International Standard: 77.040.20
Word Count Estimation: 126,000
Date of Issue: 2005-07-26
Date of Implementation: 2005-11-01
Older Standard (superseded by this standard): JB 4730-1994
Quoted Standard: GB 11533-1989; GB/T 11673-1996; JB/T 4730 1; JB/T 6063-1992; JB/T 6065-2004; JB/T 6066-2004; JB/T 8290-1998
Adopted Standard: ASME Vol V, NEQ
Drafting Organization: Hefei General Machinery Research Institute
Administrative Organization: National Standardization Technical Committee Boiler and Pressure Vessel
Regulation (derived from): National Development and Reform Commission Notice No. 46 of 2005
Summary: This standard specifies Pressure Equipment Magnetic particle testing methods, quality grading requirements. This standard applies to ferromagnetic materials for pressure equipment raw materials, components, welded joint surface, near surface defects Detection, does not apply to austenitic stainless steel, other non-ferromagnetic material testing. And pressure equipment concerned bearing structural parts, upon request may also refer to the standard magnetic particle testing.

ICS n .040.20
Professional Standard of the People's Republic of China
JBIT 4730.4-2005
Replace 1B 4730-1994
Nondestructive testing for
pressure equipment
lssuecI on 2005-07-26 Enforced 002005-11-01
Issued by National Development and Reform Commission
of the People's Republic of Cllina
JBff 4730.1 - 4730.&-2005
CONTENTS
Foreword ... 3
JBff 4730.1-2005 Nondestructive Testing for Pressure Equipment
Part 1. General Requirements ... ... ... · · · · 5
JBtr 4730.2-2005 Nondestructive Testing for Pressure Equipment
Part 2. Radiographic Testing ... ... · · · · · • 25
JBff 4730.3-2005 Nondestructive Testing for Pressure Equipment
Part 3. Ultrasonic Testing ·· ··· ···· ·· ...· ·· ·· · ·· ·· 75
JBff 4730.4-2005 Nondestructive Testing for Pressure Equipment
Part 4. Magnetic Particle Testing ·· ····.. .. ... ... ... 181
JBtr 4730.5-2005 Nondestructive Testing for Pressure Equipment
Part 5. Penetrant Testing ... ... .. .. ... . ... .. ... .. .. ... ... ... ... 209
JBtr 4730.6-2005 Nondestructive Testing for Pressure Equipment
Part 6. Eddy Ourent Testing · · .. · ... · · · · 227
JBff 4730.1-4730.&-2005
FOREWORD
This Standard JB/f 4730.1 - 4730.6-2005 (Nondestructive testing for pressure equipment)replaces JB
4730-1994 (Nondestructive testing of pressure vessels) from the issue date, and is applicable to pressure
equipment.
This Standard specifies the nondestructive testing (NDT) methods for pressure equipment and the quality
classification of testing results. But, how to select the proper NOT method in a specific case, and how to
determine the quality level shall be per the corresponding provisions of relevant regulations and product
standards respectively.
The JBff 4730.1 - 4730.6-2005 (Nondestructive testing for pressure equipment) contains the following
six Parts.
-- Part 1. General requirements;
-- Part 2. Radiographic testing;
-- Part 3. Ultrasonic testing;
-- Part 4. Magnetic particle testing;
-- Part 5. Penetrant testing;
-- Part 6. .Eddy current testing.
'Ibis Standard is mainly formulated with reference to the corresponding requirements of Section V ,
ASME ( Boiler and pressure vessel code) and ns Standard, and in coordination with the actual domestic
situations. The contents in comparison with JB 4730-1994 are changed as follows.
1. The applicable scope is extended to metallic pressure equipment.
2. The technical requirements for the NDT for pressure equipment in-service are added.
3. In radiographic testing, the test scope of butt welded joint in .copper/copper alloy and nickeV nickel
alloy pressure equipment, and the test scope of circumferential butt welded joint in· steel, nickel,
copper/copper alloy, aluminium/aluminium alloy and titanium/ titanium alloy pressure piping are
added.
4. In radiographic testing, the examination thickness range of steel butt welded joint is extended to 2mm
- 400mm, the contents of the industrial radiation film series, the densitometer, the application of
Se-75 ray source, and the exposure curve are added; and the requirement for illumioance of
radiograph reading light is modified.
5. In ultrasonic testing, the test scopes of austenitic stainless steel plate, duplex stainless steel plate,
aluminium/aluminium alloy plate, and titanium/titanium alloy plate used for pressure equipment are
added; and the testing requirements for explosive and rolled clad steel plates are regulated.
6. In ultrasonic testing, the examination thickness range of steel butt welded joint is extended to 6mm -
400mm; the technical grade classification of steel butt welded joint, and the test scopes of T-w~ld
and austenitic stainless steel butt welded joint are added.
7. In ultrasonic testing, the test scopes of circumferential butt welded joint in steel pressure piping with
JB/T 4730.1 -4730.6-2005
thickness greater than or equal to 4mm and outside diameter 32mm - 15~ or thickness 4mm -
6mm and outside diameter greater than or equal to 159mm are added; and the test scopes of
circumferential butt welded joint in aluminium/aluminium alloy pipe/tube connection of thickness
greater than or equal to 5mm and outside diameter 80mm - 159mm, or thickness 5mm - 8mm and
outside diameter greater than or equal to 159mm are also added.
8. In fluorescent magnetic particle testing or fluorescent penetrant testing, the test scope of the high
strength steel and crack-sensitive material and added.
9. The fiµ- field eddy current testing used for ferromagnetic steel tube in-service and the eddy current
testing for non-ferromagnetic tube in-service are added.
This Standard is proposed by the Chin~ Standardization Committee on Boilers and Pressure Vessels
(SActrC 262).
This Standard is under the jurisdiction of the China Standardization Committee on Boilers and Pressure
Vessels (SAC/TC 262).
This Standard is responsibly drafted by the Hefei General Machinery Research Institute.
The organizations participating for the formulation of this Standard are as follows.
Economics and Development Research Institute, SINOPEC; China Special Equipment Inspection and
Research Centre; Special Equipment Inspector Qualification Committee of China; Harbin Boiler Co.,Ltd.;
Jiangsu Province Special Equipment Safety Supervision Inspection Center, Boiler & Pressure vessel; Anhui
Province Special Equipment Inspection Center; Shanghai Boiler Works, Ltd.. Dalian Boiler Inspection
Institute; Nanjing Chemical Industrial Chemical Machinery Works; Beijing Yanshan Petro-Chemical Corp.;
Second Institute of China Aerospace; Beijing Aeronautical Material Research Institute; North China Electric
Power Research Institute; Xian Airplane Manufacturing Corp. etc.
The main writers of this Standard are.
JB/f 4730.1 (General requirements) - Shou Binan, Shen Gang, Yuan Rong, Qiang Tianpeng,
Kang Jiqian, He Zeyun, Hu Jun, Yang Guoyi;
JB/f 4730.2 (Radiographic testing) - Qiang Tianpeng, Yuan Rong, Zheng Shicai, Li Wei,
Chen Wenhu, Li Yan, He Zeyun;
JB/f 4730.3 (Ultrasonic testing) - Tuan Rong, Yao Zbizhong, Kang Jiqian, Yan Changzhou,
Xiao Jiawei, Xu Zunyan, Pan Rongbao, Chen Chengyu;
JB/f 4730.4 (Magnetic particle testing) - Pan Rongbao, Fan Yu, Song Zhizbe, Chen Jianjun,
Zhou Zbiwei;
JB/f 4730.5 (Penetrant testing) - F~ Yu, Xing Zbaohui, Sun Diansbou, Chen Yongjian;
JB/f 4730.6 (Eddy current testing) - Guan Weihe, Shen Gongtian, Hu Xianlong,
Lin Junming, Xu Kebei.
The issued Standard of all various editions replaced by this Standard is. JB 4730--1994.
.JB
Professional Standard of the People's Republic of China
JB!f 4730.4-2005
Replace part of JB 4730-1994
Nondestructive testing for
pressure equipment
Part 4 . Magnetic particle testing
Issued on 2005-07-26 Enforced on 2005-11-01
Issued by National Development and Reform Commission
of the People's Republic of China
JB!f 4730.4-2005
CONTENTS
Foreword·... ... ... ... ... ... ... ... · • ... ... ... ... · • ... ... ... ... ... ... ... ... · · · 184
1 Scope ·· · ·· ... · ···· · ... ··· · ···· · ··· ·· · ...·· · ·· · ...·· · ...· 187
2 Normative References ·· · ··· ·· ··· ···· ·· ··· ·· ··· ··· · ··· ·· · ···· ··· ·· ·· · ··· ··· · ·· · ··· ·· ·· · ··· · ··· ··· ·· ···· ·· · ·· · 187
3 General Requirements ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... · · 187
4 Testing Methods .. . ... . ... ... .-... ... ... 200
5 Classification and Record of Indicated Magnetic Mark ····· ···· ··· ·· · ·· ·· ··· ·· ·· ···· ···· ··· ···· ·· · ···· 201
6 Retesting ... ... ... ... ... ... ... ... · · • · • ... ... ... ... ... ... ... ... ... ... ... · · 202
7 Demagnetization . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... · · · 202
8 Magnetic Particle Testing for Pressure Equipment In-Service ... ... ... ... ... ... ... · · · · 203
9 Quality Classification for Magnetic Particle Testing ... ... ... ... ... ... ... ... ... ... · 203
10 Report of Magnetic Particle Testing ... ... ... ... ... ... ... ... ... ... ... ... ... · · · · 204
Annex A (infonnative) Pattern, Ammeter Indication and Conversion Relation of Various
Magnetization Currents ... ... ... ... ... ... ... · · •·... ... ... ... · 205
Annex B (informative) 'fypical Magnetization Methods for Welded Joint ·· · ···· ··· ·· ·· ··· · ···· · ... · 206
FOREWORD
The JB/f 4730.1 - 4730.6-2005 ( Nondestructive testing for pressure equipment )contains following six
Parts.
- · - Part 1. General requirements;
-- Part 2. Radiographic testing;
- Part 3. Ultrasonic testing;
-- Part 4. Magnetic particle testing;
-- Part 5. Penetrant testing;
- Part 6. &Jdy current testing.
This Part is the Part 4 of JB/f 4730.1 - 4730.6-2005. Magnetic particle testing (MT). This Part is
formulated with reference to the corresponding reqWrem.ents of Section V, ASME ( Boiler and pressure vessel
code) and JIS Standards. Moreover. this P~ is revised in accordance with the professional feedback
comments. The contents of this Part in comparison with the corresponding part of JB 4730-1994 are
changed as follows.
1. In the magnetizat...
Related standard:   JB/T 4730.7-2012  JB/T 4730.8-2012
   
 
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