XJJ140-2021：耐热聚乙烯（PE-RTⅡ）直埋热水保温管道技术规程

XJJ140-2021······1

1 总则······6

2 术语和符号······7

2.1 术语······7

2.2 符号······9

3 材料要求······10

3.1 一般规定······10

3.2 GRPE热水保温管道······10

3.3 PE-RTⅡ管材及管件······14

3.4 管道标志、运输和储存······19

4 设计······20

4.1 一般规定······20

4.2 水力计算······21

4.3 管网的布置与敷设······21

4.4 管道应力和作用力的计算······25

4.5 管道阀门及附件······28

4.6 管道保温······29

5 施工······31

5.1 一般规定······31

5.2 沟槽开挖······32

5.3 PE-RTII管道连接······33

5.4 接头保温······35

5.5 管道敷设······36

5.6 沟槽回填······36

6 压力试验、清洗和试运行······40

6.1 管网压力试验······40

6.2 管网清洗······41

6.3 系统试运行······42

7 工程竣工验收······44

7.1 一般规定······44

7.2 工程质量验收······44

7.3 竣工验收······46

附录A GRPE热水保温管道的检验······48

附录B 轴向剪切强度的测试方法······52

附录C PE-RTⅡ管材及管件原材料的质量要求······54

附录D GRPE热水保温管道的水力计算······57

附录E 管道热熔对接焊接规程······86

附录F 管道电熔承插焊接规程······91

附录G 质量验收报告及记录······95

本规程用词说明······103

引用标准名录······104