Page 5 - QRedition5.0 062021

Quality Requirements Edition 5.0 European Enamel Association

7.22 Armatures, form parts, pipes, valves and agitators for page 79 8.5.2 Requirements set on water to be used in the enamelling shop page 107
the chemical industry 8.5.3 Conditions of grinding page 109
7.23 Waste-pipes of cast iron page 81 8.5.3.1 Test of the fineness of grinding page 110
7.24 Silos for animal feed page 83 8.5.3.2 Examination of test sieve residue page 110
7.25 Dung silos page 85 8.5.4 The flow characteristics of porcelain and vitreous enamel slip (slurry) page 110
7.26 Agrarian articles page 88 8.5.4.1 Terms of rheology page 111
7.27 Signs and advertising boards page 90 8.5.4.2 Determination of the density of slips page 112
8.0 EEA – specifications page 93 8.5.4.3 Determination of the flow behaviour of porcelain and vitreous
8.1 Cast iron, suitable for enamelling page 93 enamel slips by simple methods page 112
8.1.1 Cast iron with lamellar graphite complying to DIN 1691 page 93 8.5.4.4 Determination of the flow-characteristic of porcelain and
8.1.2 Cast iron with spherical graphite complying to DIN 1693 page 94 vitreous enamel slips by means of rotary viscosity meter page 114
8.2 Examination of metal pre-treatment page 96 8.5.4.5 Determination of the flow-characteristic of enamel slips page 114
8.2.1 Control of the sheet steel pre-treatment page 96 by means of viscosity tester.
8.2.1.1 Testing of degreasing baths page 96 8.6 Testing of porcelain and vitreous enamel coatings page 115
8.2.1.2 Determination of acid concentration, sulphuric acid pickling page 96 8.6.1 Determination of resistance to boiling water by long page 115
8.2.1.3 Determination of bivalent iron, sulphuric acid pickling page 97 terms exposure

8.2.1.4 Determination of nickel sulphate, nickel-exchange bath page 97 8.6.2 Determination of the resistance to drinking water page 116
8.2.1.5 Determination of bivalent iron in the nickel-exchange bath page 98 8.6.3 Testing of adherence of porcelain and vitreous enamels enamel
8.2.1.6 Determination of the nickel deposit on sheet steel page 98 to steel of more than 3 mm thickness and cast iron page 117
8.3 Examination of porcelain and vitreous enamels and additives 8.6.4 Determination of thermal shock resistance of porcelain and vitreous
for enamelling page 99 enamelled articles in water page 118
8.3.1 Surface tension of porcelain and vitreous enamels page 99 8.6.5 Determination of thermal shock resistance of porcelain and vitreous
8.4 Porcelain and vitreous enamel powder for the electrostatic enamelled articles in an air-stream page 118
application on sheet steel page 101 8.6.6 Admissible differences of application thickness on corrugated page 119
8.4.1 Testing of powder fineness page 101 and undulated pairs of sheet steel panels for heat exchanger
8.4.2 Testing of powder fluidity page 102 8.6.7 Determination of the resistance against corrosion and page 120
8.4.3 Testing of powder adhesion page 103 creeping after mechanical impact
8.4.4 Testing of the electrical resistance of the powder page 103 8.6.8 Determination against climatic impact like weathering page 120
8.5 Examination of enamelling clays page 105 and UV-resistance
8.5.1 Testing of setting agents and other accessory materials page 106 8.7 Valuation of enamelling defects page 121

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