ICS

77.040.20

CCS

H26

中華人民共和國國家標(biāo)準(zhǔn)

GB/T44845—2024

承壓設(shè)備低頻電磁檢測方法

Lowfrequencyelectromagnetictestingmethodforpressureequipments

2024-10-26發(fā)布2024-10-26實(shí)施

國家市場監(jiān)督管理總局發(fā)布

國家標(biāo)準(zhǔn)化管理委員會(huì)

GB/T44845—2024

目次

前言

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Ⅲ

1

范圍

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2

規(guī)范性引用文件

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3

術(shù)語和定義

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4

方法概要

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5

人員資格

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6

低頻電磁檢測儀器

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7

低頻電磁檢測程序

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8

檢測結(jié)果評(píng)價(jià)與處理

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9

檢測記錄和報(bào)告

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10

附錄A（資料性）檢測區(qū)域劃分與編號(hào)的示例

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11

附錄B（資料性）檢測記錄及報(bào)告

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Ⅰ

GB/T44845—2024

前言

本文件按照GB/T1.1—2020《標(biāo)準(zhǔn)化工作導(dǎo)則

第1部分：標(biāo)準(zhǔn)化文件的結(jié)構(gòu)和起草規(guī)則》的規(guī)定

起草。

請(qǐng)注意本文件的某些內(nèi)容可能涉及專利。本文件的發(fā)布機(jī)構(gòu)不承擔(dān)識(shí)別專利的責(zé)任。

本文件由全國鍋爐壓力容器標(biāo)準(zhǔn)化技術(shù)委員會(huì)（SAC/TC262）提出并歸口。

本文件起草單位：中國特種設(shè)備檢測研究院、北京工業(yè)大學(xué)、重慶市特種設(shè)備檢測研究院、南京市

鍋爐壓力容器檢驗(yàn)研究院、成都市特種設(shè)備檢驗(yàn)檢測研究院、云南省特種設(shè)備安全檢測研究院、貴州省

特種設(shè)備檢驗(yàn)檢測院、廣東省特種設(shè)備檢測研究院茂名檢測院、蘇州熱工研究院有限公司、江西省檢驗(yàn)

檢測認(rèn)證總院特種設(shè)備檢驗(yàn)檢測研究院。

本文件主要起草人：李光海、陸新元、焦敬品、邵珊珊、陳杰、章彬斌、彭剛、袁坤、羅雄、史芳杰、

沈書乾、于永亮、趙景勇、趙鵬、聶印、張偉、湯新文、郭璟倩、張琦。

Ⅲ

GB/T44845—2024

承壓設(shè)備低頻電磁檢測方法

1范圍

本文件規(guī)定了進(jìn)行承壓設(shè)備低頻電磁檢測的檢測儀器要求、檢測程序和結(jié)果評(píng)價(jià)方法等。

本文件適用于壁厚為2mm～20mm的導(dǎo)電性金屬材料制承壓設(shè)備表面和埋藏缺陷的低頻電磁檢

測，檢測時(shí)包括涂層厚度在內(nèi)的最大提離高度不大于3mm。

2規(guī)范性引用文件

下列文件中的內(nèi)容通過文中的規(guī)范性引用而構(gòu)成本文件必不可少的條款。其中，注日期的引用文

件，僅該日期對(duì)應(yīng)的版本適用于本文件；不注日期的引用文件，其最新版本（包括所有的修改單）適用

于本文件。

GB/T5616無損檢測應(yīng)用導(dǎo)則

GB/T12604.6無損檢測術(shù)語渦流檢測

NB/T47013（所有部分）承壓設(shè)備無損檢測

3術(shù)語和定義

NB/T47013.1、GB/T12604.6界定的以及下列術(shù)語和定義適用于本文件。

3.1

低頻電磁激勵(lì)頻率lowfrequencyelectromagneticexcitationfrequency

低頻電磁場激勵(lì)電流的標(biāo)稱頻率。

3.2

低頻電磁場lowfrequencyelectromagneticfield

采用激勵(lì)頻率一般不高于300Hz的低頻交流電流進(jìn)行激勵(lì)，在被檢測對(duì)象表面和內(nèi)部產(chǎn)生的渦流

場、漏磁場的耦合場。

3.3

缺陷當(dāng)量defectequivalent

依據(jù)獲得的信號(hào)特征給出缺陷量值。

3.4

正交掃查orthogonalscan

掃查方向互相垂直的掃查。

4方法概要

4.1低頻電磁檢測方法的基本原理見圖1。通有低頻交流電流的線圈在被檢測對(duì)象表面和內(nèi)部激發(fā)出低

頻電磁場，在缺陷處低頻電磁場會(huì)發(fā)生