| Forside | | Indhold | | Forrige | | Næste |

Metalafgivelse til drikkevand, DEL 2

Appendix F

1. Comparison of German and Danish Tests and Results,

Metal Release from Copper Alloys

-Standard test pieces, DIN 50931-1 [8]

-Material composition, chemical analysis [13]

-Water composition

-Selected German results [14]

-Comparison of test conditions and results [15]

Standard Test Pieces

tabel

The above alloys have been manufactured and tested in Germany.

Alloys C, E and F have been tested also in the Danish rig test in the operation period March 2002-March 2003.

figur

In both German and Danish tests the alloys were mounted in stainless steel pipes at same dimensions and same ratio between test piece and pipe length.

German Water Compositions

tabel
tabel

Water Composition in Danish Tests

Waterworks HCO3- mmole/l pH Cl- mg/l SO4-- mg/l Conductivity mS/m
Astrup 1,4 7,5 - 7,7 33 38 31
Vester Gjesing 2,1 7,5 - 7,7 31 37 37
Lysholt 3,8 7,6 - 7,8 23 47 51
Regnemark 6,3 7,4 - 7,6 100 83 77 (12°C)

Some important water parameters for tested water types in Germany and Denmark

Waterworks Conductivity mS/m HCO3- mmole/l pH
V. Gjesing, DK 37 2,1 7,6
Langen, DE 47 2,0 7,0
Lysholt, DK 51 3,8 7,7
Berlin, DE 73 3,5 7,7
7,2
Regnemark, DK 100 6,3 7,4
Würzburg, DE 130 6,4 7,6

The waters are listed with increasing conductivity.

Klik her for at se figurerne.

Comparison of German and Danish Rig Tests

Samples Comparison
Copper alloysIdentical
ManufactureIdentical
Exposed length of alloyIdentical (10 cm)
Shape of test pieceIdentical
Mounted in stainless steel pipesIdentical
Ratio surface/volumeIdentical
Internal diameterIdentical
Total pipe length in rig German = 3 m
Danish = 1.4 m (+0.3)
No. of alloy test pieces per pipe length German = 5
Danish = 2
Ratio alloys/pipe length German = 17 %
Danish = 15 % (12 %)

Operating conditions German test rig Danish test rig
Temperature Ambient temperature 12 (+/- 2)°C
Pressure 0.5 Bar 3 Bar
Velocity 0.3 m/sec ≈0.6 m/sec.
Daily water consumption 130 l 200 l
Stagnation 64 x 15 min + 8 h 8 h + 16 h
Number of daily flushes 64 2
Length of flush period 45 sec 15 min
Total daily time of flush 48 min 30 min

Comparison of German and Danish Results

Pb, ppb   German Danish
Water works Berlin Regnemark Lysholt
KS 4,3 3,5 6,3 3,8
Cond. ms/m 73 77(12°C) 51
pH   7,4 7,7
Alloy Alloy mrk. BK 8,2 pH 8h 16h M(T) 12h 12h
CuZn40Pb2 C 0,2 7,7 6 8 5 4 4
  0,5 7,2 16 15 11
CuZn39Pb3 D 0,2 7,7 6 9 5 (4) (4)
  0,5 7,2 12 16 10
CuZn36Pb2As E 0,2 7,7 17 24 15 40 35
  0,5 7,2 42 59 35
CuSn5Zn5Pb5-C F 0,2 7,7 12 16 11 11 6
0,5 7,2 15 18 13

Pb, ppb   German Danish
Water works Langen Regnemark Lysholt
KS 4,3 0,5 6,3 3,8
Cond. ms/m 47 77(12°C) 51
pH 7,0 7,4 7,7
Alloy Alloy mrk. BK 8,2 pH 8h 16h M(T) 12h 12h
CuZn40Pb2 C           4 4
0,5 7,0 7 6 4
CuZn39Pb3 D           (4) (4)
0,5 7,0 7 7 4
CuZn36Pb2As E           40 35
0,5 7,0 56 65 33
CuSn5Zn5Pb5-C F           11 6
0,5 7,0 10 10 6

Comparison of German and Danish Results

Ni, ppb   German Danish
Water works Berlin Regnemark Lysholt
KS 4,3 3,5 6,3 3,8
Cond. ms/m 73 77(12°C) 51
pH   7,4 7,7
Alloy Alloy mrk. BK 8,2 pH 8h 16h M(T) 12h 12h
CuZn40Pb2 C 0,2 7,7 0,8 1,3 0,8   0,5
0,5 7,2 2,0 1,9 1,2
CuZn39Pb3 D 0,2 7,7 2,4 3,8 1,5   (0,5)
0,5 7,2 4,7 8,6 2,8
CuZn36Pb2As E 0,2 7,7 0,8 1,1 0,9 1,5 0,4
0,5 7,2 2,1 2,9 1,5
CuSn5Zn5Pb5-C F 0,2 7,7 9,6 14,4 6 70 20
0,5 7,2 31,8 53,4 18

Ni, ppb   German Danish
Water works Langen Regnemark Lysholt
KS 4,3 0,5 6,3 3,8
Cond. ms/m 47 77(12°C) 51
pH 7,0 7,4 7,7
Alloy Alloy mrk. BK 8,2 pH 8h 16h M(T) 12h 12h
CuZn40Pb2 C             0,5
0,5 7,0 1,1 1,6 0,7
CuZn39Pb3 D             (0,5)
0,5 7,0 3,4 5,0 1,5
CuZn36Pb2As E           1,5 0,4
0,5 7,0 1,2 2,0 0,8
CuSn5Zn5Pb5-C F           70 20
0,5 7,0 92 139 44

 

| Forside | | Indhold | | Forrige | | Næste | | Top |



Version 1.0 December 2004, © Miljøstyrelsen.