UPVC/CPVC ลดที

dN1 × DN2

DN

D

L1

L2

i1

i2

25 × 20

20 × 15

32.2

31

31

18.75

16

32 × 20

25 × 15

41.2

36

35.4

23.5

17

32 × 25

25 × 20

40.6

36

36

22

18.5

40 × 20

32 × 15

50

43

40

27

17

40 × 25

32 × 20

50

45

42

27

18

50 × 25

40 × 20

60.6

51.5

47

32

19

50 × 32

40 × 25

61

51

50.4

31

22

63 × 25

50 × 20

75

62.5

62.5

38

19

63 × 32

50 × 25

75

62.5

62.5

38

22

63 × 40

50 × 32

75

62.5

62.5

38

26

63 × 50

50 × 40

75

66

66

38

31

75 × 32

65 × 25

91

73.5

63.5

44

22

75 × 40

65 × 32

91

73.5

67

44

27

75 × 50

65 × 40

91

73.5

73

44

31

75 × 63

65 × 50

88

79

79

44

38

90 × 25

80 × 20

106

77

70

51

19

90 × 32

80 × 25

104

77

74

51

22

90 × 40

80 × 32

106

77

77

51

27

90 × 50

80 × 40

104

92

83

51

31

90 × 63

80 × 50

104

87

92.4

51

44

90 × 75

80 × 65

104

92

95

57

44

110 × 32

100 × 25

126

105

80

61

22

110 × 63

100 × 50

126.8

106

99

61

38

110 × 75

100 × 65

126

105

104

61

44

140 × 63

125 × 50

165

130.5

115

76

38.5

140 × 90

125 × 80

165

130.5

128.5

76

52

160 × 63

150 × 50

185

128

125

86

38

160 × 75

150 × 65

185

128

132

86

44

160 × 90

150 × 80

185

149

139.5

86

51

160 × 110

150 × 100

185

149

149

86

61

225 × 63

200 × 50

254

172

160

119

38

225 × 75

200 × 65

254

172

165

119

44

225 × 90

200 × 80

254

172

170

119

51

225 × 110

200 × 100

254

182

180

119

61

225 × 140

200 × 125

254

205

195

119

76

225 × 160

200 × 150

254

205

205

119

86

280 × 110

250 × 100

314.5

268

208

146

61

280 × 140

250 × 125

314.5

268

223

146

61

280 × 160

250 × 150

314.5

268

235

146

61

280 × 225

250 × 200

314.5

268

267

146

61

315 × 160

300 × 150

345

250

249

165

86

315 × 225

300 × 200

344

295

279

168

120

400 × 315

400 × 300

433

376

343

207

165

500 × 315

500 × 300

536

390

417

230

164