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GB/T18984—2026低温管道用无缝钢管考试试卷

GB/T18984—2026低温管道用无缝钢管考试试卷

GB/T18984—2026低温管道用无缝钢管考试试卷

考试说明:本试卷试题均依据《GB/T18984—2026 低温管道用无缝钢管》标准原文编制,题型分为单项选择题、判断题,所有答案均可在标准文档中找到对应原文,满分100分。

一、单项选择题(共20题,每题3分,共60分)

1、GB/T18984—2026标准的发布日期为()

A、2026年04月30日B、2026年11月01日C、2025年04月30日D、2025年11月01日

2、GB/T18984—2026标准的实施日期为()

A、2026年04月30日B、2026年11月01日C、2025年04月30日D、2025年11月01日

3、GB/T18984—2026标准本次修订替代的旧版本为()

A、GB/T18984—2010B、GB/T18984—2016C、GB/T18984—2018D、GB/T18984—2020

4、本标准适用的低温钢管最低工作温度等级为()

A、-45℃B、-100℃C、-196℃D、-200℃

5、本标准中热轧(挤、顶、扩)钢管的制造代号为()

A、W-CB、W-HC、R-HD、R-C

6、低温钢管牌号中“DG”代表的含义是()

A、低温、高压B、低温、管道C、耐热、管道D、耐蚀、低温

7、06Ni9DG钢管的交货状态为()

A、仅正火状态B、正火加回火C、淬火加回火或二次正火加回火D、自然冷却状态

8、09DG、10MnDG、16MnDG钢管回火温度最低不低于()

A、500℃B、550℃C、600℃D、650℃

9、06Ni3MoDG钢管正火温度区间为()

A、820℃~880℃B、880℃~940℃C、785℃~815℃D、815℃~885℃

10、本标准规定钢中五害元素总量As+Sn+Sb+Bi+Pb应不大于()

A、0.030%B、0.050%C、0.080%D、0.100%

11、16MnDG钢管壁厚S>16mm时,横向断后伸长率不小于()

A、19%B、21%C、22%D、24%

12、06Ni9DG钢管的最低抗拉强度为()

A、455MPaB、520MPaC、690MPaD、665MPa

13、09Mn2VDG钢管低温冲击试验温度为()

A、-45℃B、-70℃C、-100℃D、-196℃

14、标准尺寸(10×10)冲击试样的递减系数为()

A、2/3B、5/6C、1/2D、1

15、低温钢管液压试验最大试验压力为()

A、15MPaB、20MPaC、25MPaD、30MPa

16、钢管液压试验稳压时间应不少于()

A、3sB、5sC、8sD、10s

17、外径D>400mm或壁厚S>40mm的钢管,可用()代替压扁试验

A、扩口试验B、弯曲试验C、冲击试验D、拉伸试验

18、冷拔(轧)钢管公称外径≤25.4mm时,普通级外径允许偏差为()

A、±0.15mmB、±0.20mmC、±0.25mmD、±0.30mm

19、公称外径不大于60mm的钢管,管端切斜应不大于()

A、1.0mmB、1.5mmC、2.0mmD、2.5mm

20、外径D≤76mm且壁厚S≤3.0mm的钢管,每批最大数量为()

A、200根B、300根C、400根D、50根

二、判断题(共20题,每题2分,共40分)

1、GB/T18984—2026本次修订新增了热挤、热顶的钢管制造方式分类。()

2、本标准适用于-45℃~-196℃级低温流体输送及低温热交换器用无缝钢管。()

3、冷拔(轧)无缝钢管的产品制造代号为W-H。()

4、本标准钢冶炼必须采用电弧炉加炉外精炼真空处理,不允许采用其他冶炼方式。()

5、连铸管坯中心裂纹、中间裂纹等缺陷级别应分别不大于1级。()

6、除06Ni9DG钢管外,其余钢管可采用正火、正火加回火或淬火加回火状态交货。()

7、16MnDG、10MnDG、09DG钢管可适量加入钛元素改善性能。()

8、钢中残余铬元素含量应不大于0.35%。()

9、所有牌号低温钢管的纵向、横向冲击吸收能量平均值均不低于40J、27J。()

10、冲击试验一组3个试样中,最小单个值不得低于平均值的60%。()

11、供方可用漏磁检测或涡流检测方式替代钢管液压试验。()

12、压扁试验变形系数α统一取值为0.08。()

13、弯曲试验弯芯直径为25mm,试样需在室温下弯曲90°。()

14、外径不大于150mm、壁厚不大于10mm的钢管可按需做扩口试验。()

15、钢管非金属夹杂物DS类级别应不大于3.5级。()

16、低温钢管应逐根全长进行超声检测,验收等级为U2级。()

17、钢管局部缺陷清除后,剩余壁厚可小于壁厚偏差允许最小值。()

18、钢管常规通常长度为4000mm~12000mm。()

19、D≥219mm的钢管拉伸试验统一沿纵向取样。()

20、钢管每批由同一牌号、炉号、规格、热处理制度的产品组成。()

三、标准答案(含标准原文出处)

(一)单项选择题答案

1、A(原文封面:2026-04-30发布)

2、B(原文封面:2026-11-01实施)

3、B(原文前言:本文件代替GB/T18984—2016《低温管道用无缝钢管》)

4、C(原文第1章:适用于-45 ℃级~-196 ℃级低温流体输送管道及低温热交换器用无缝钢管)

5、B(原文4.1:热轧(挤、顶、扩)钢管,代号为W-H)

6、B(原文4.2:“DG”分别是“低温”“管道”汉语拼音的首位大写字母)

7、C(原文6.5.2:06Ni9DG钢管应以淬火加回火或二次正火加回火状态交货)

8、C(原文表1:09DG、10MnDG、16MnDG回火温度不低于600℃)

9、A(原文表1:06Ni3MoDG正火温度820 ℃~880 ℃)

10、B(原文7.1.3:As+Sn+Sb+Bi+Pb ≤0.050 %)

11、A(原文表3:16MnDG钢管S>16mm时,横向断后伸长率≥19%)

12、C(原文表3:06Ni9DG钢管抗拉强度≥690MPa)

13、B(原文表4:09Mn2VDG钢管冲击试验温度-70℃)

14、D(原文表5:10×10标准试样冲击递减系数为1)

15、B(原文7.3.1:液压试验最大试验压力为20 MPa)

16、B(原文7.3.1:试验压力下稳压时间不少于5s)

17、B(原文7.4.2.1:D>400 mm或S>40 mm的钢管可用弯曲试验代替压扁试验)

18、A(原文表7:冷拔钢管公称外径≤25.4mm,普通级偏差±0.15mm)

19、B(原文7.9.5.2:公称外径≤60mm钢管管端切斜不大于1.5mm)

20、C(原文10.2:D≤76mm且S≤3.0mm时,每批钢管数量不超过400根)

(二)判断题答案

1、正确(原文前言a:本次修订增加热挤和热顶制造方式分类)

2、正确(原文第1章:适用-45 ℃~-196 ℃级低温工况无缝钢管)

3、错误(原文4.1:冷拔(轧)钢管代号为W-C,W-H为热轧钢管代号)

4、错误(原文6.1:供需双方协商注明,可采用其他更高要求冶炼方法)

5、正确(原文6.3:连铸管坯各类裂纹、气泡缺陷级别分别不大于1级)

6、正确(原文6.5.1、6.5.2:除06Ni9DG外,其余钢管采用三类交货状态)

7、正确(原文表2注a:16MnDG、10MnDG 和09DG可加入0.010%~0.050%的Ti)

8、错误(原文7.1.3:钢中残余Cr≤0.25%)

9、正确(原文表4:所有牌号钢管纵向冲击均值≥40J,横向≥27J)

10、错误(原文表4注:最小单个值不小于平均值的70%)

11、正确(原文7.3.2:漏磁、涡流检测可替代液压试验)

12、正确(原文7.4.1:压扁试验变形系数α取值0.08)

13、错误(原文7.4.2.2:弯曲试验为室温弯曲180°)

14、正确(原文7.4.3:外径≤150mm且壁厚≤10mm钢管可按需做扩口试验)

15、错误(原文7.6:DS类夹杂物应不大于2.5级)

16、正确(原文7.7.1:钢管逐根全长超声检测,验收等级符合GB/T5777 U2级)

17、错误(原文7.8:缺陷清除后实际壁厚应不小于壁厚偏差允许最小值)

18、正确(原文7.9.2.1.1:钢管通常长度为4000mm~12000mm)

19、错误(原文8.1.2:D≥219mm钢管尺寸允许时横向取样)

20、正确(原文10.2:同批次钢管需同牌号、炉号、规格、热处理制度)

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  1. CONNECT:[ UseTime:0.001304s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001751s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000751s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000707s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001443s ]
  6. SELECT * FROM `set` [ RunTime:0.000639s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001473s ]
  8. SELECT * FROM `article` WHERE `id` = 848201 LIMIT 1 [ RunTime:0.013403s ]
  9. UPDATE `article` SET `lasttime` = 1783845903 WHERE `id` = 848201 [ RunTime:0.010059s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000634s ]
  11. SELECT * FROM `article` WHERE `id` < 848201 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001338s ]
  12. SELECT * FROM `article` WHERE `id` > 848201 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002728s ]
  13. SELECT * FROM `article` WHERE `id` < 848201 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002540s ]
  14. SELECT * FROM `article` WHERE `id` < 848201 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.005120s ]
  15. SELECT * FROM `article` WHERE `id` < 848201 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003327s ]
0.227198s