DB62/T25-3125-2016：预制保温耐热聚乙烯(PE-RTⅡ)低温直埋供热管道技术规范

DB62T25-3125-2016······1

1 总则······9

2 术语与符号······10

2.1 术语······10

2.2 符号······11

3 基本规定······13

4 设计······14

4.1 一般规定······14

4.2 水力计算······14

4.3 管网的布置与敷设······16

4.4 管道应力计算和作用力计算······19

5 材料······22

5.1 保温复合塑料管······22

5.2 PE-RTⅡ型管材及管件······25

5.3 管道标识、运输和储存······34

6 管道保温······36

6.1 一般规定······36

6.2 保温结构······36

6.3 保温厚度······37

7 安装与施工······38

7.1 土方工程······38

7.2 管道安装及连接······42

8 试压、清洗、试运行、验收······44

8.1 管道压力试验······44

8.2 管道清洗······45

8.3 系统试运行······45

8.4 工程竣工验收······46

附录A 轴向剪切强度的测试方法······47

附录B 管道原材料的质量要求······49

附录C 保温复合塑料管的检验······52

附录D 管道热熔对接焊接规程······56

D.1 总则······56

D.2 热熔对接连接接头质量检验······57

D.3 热熔对接焊连接步骤······59

D.4 热熔对接连接操作规定······63

附录E 管道电熔承插焊接连接规程······64

E.1 总则······64

E.2 电熔连接流程······64

E.3 电熔连接接头质量检验······65

本规范用词说明······67

引用标准名录······68

附：条文说明······70

1 总则······72

2 术语与符号······74

3 基本规定······75

4 设计······76

4.2 水力计算······76

4.3 管网的布置与敷设······77

4.4 应力计算和作用力计算······77

5 材料······80

5.1 保温复合塑料管······80

5.2 PE-RTⅡ型管材及管件······80

6 管道保温······82

6.1 一般规定······82

6.2 保温结构······82

7 安装与施工······83

7.1 土方工程······83

7.2 管道安装及连接······85

8 试压、清洗、试运行、验收······87

8.1 管道压力试验······87

8.2 管道清洗······87