DB62T25-3125-2016······1

1 總則······9

2 術語與符號······10

2.1 術語······10

2.2 符號······11

3 基本規定······13

4 設計······14

4.1 一般規定······14

4.2 水力計算······14

4.3 管網的布置與敷設······16

4.4 管道應力計算和作用力計算······19

5 材料······22

5.1 保溫復合塑料管······22

5.2 PE-RTⅡ型管材及管件······25

5.3 管道標識、運輸和儲存······34

6 管道保溫······36

6.1 一般規定······36

6.2 保溫結構······36

6.3 保溫厚度······37

7 安裝與施工······38

7.1 土方工程······38

7.2 管道安裝及連接······42

8 試壓、清洗、試運行、驗收······44

8.1 管道壓力試驗······44

8.2 管道清洗······45

8.3 系統試運行······45

8.4 工程竣工驗收······46

附錄A 軸向剪切強度的測試方法······47

附錄B 管道原材料的質量要求······49

附錄C 保溫復合塑料管的檢驗······52

附錄D 管道熱熔對接焊接規程······56

D.1 總則······56

D.2 熱熔對接連接接頭質量檢驗······57

D.3 熱熔對接焊連接步驟······59

D.4 熱熔對接連接操作規定······63

附錄E 管道電熔承插焊接連接規程······64

E.1 總則······64

E.2 電熔連接流程······64

E.3 電熔連接接頭質量檢驗······65

本規范用詞說明······67

引用標準名錄······68

附：條文說明······70

1 總則······72

2 術語與符號······74

3 基本規定······75

4 設計······76

4.2 水力計算······76

4.3 管網的布置與敷設······77

4.4 應力計算和作用力計算······77

5 材料······80

5.1 保溫復合塑料管······80

5.2 PE-RTⅡ型管材及管件······80

6 管道保溫······82

6.1 一般規定······82

6.2 保溫結構······82

7 安裝與施工······83

7.1 土方工程······83

7.2 管道安裝及連接······85

8 試壓、清洗、試運行、驗收······87

8.1 管道壓力試驗······87

8.2 管道清洗······87