Technological Characteristics of Water pipe and pipe opening laid

1.       Bend radius ≥2d, ovality of bend≤10%, and then pipe wall thickness reduction rate≤13%

2.       The diameter of the ball for ball crossing test of cooling pipes in staves is more than 0.8 times internal diameter of the water pipe.

3.       Hydrostatic test: Testing pressure of 2 Mpas for duration of 30 minutes.

4.       Bent pipes will be treated with sand blast for rust removal until metallic luster appears, and then followed by carburization prevention treatment.

Plasma splaying coating

1.       The main material is metal oxides: (a) The first layer is combining layer, (b) The second layer is carburization prevention layer, and (c) the third layer is protective layer.

2.       Treating method: Special equipment is used for coating spraying application, with higher cost.

3.       coating thickness: each layer: 0.03~0.05mm, total three layers : 0.09~0.15mm

4.       Carburization prevention effect:

Chemical analysis: no carburization layer, carbon addition: 0

Metallurgical analysis: no eutectoid steel layer

Gap between water pipe and mother material≤0.1mm

Water pipe tensile strength: #10 steel≥300Mpas

                                         #20 steel≥400Mpas

Water pipe elongation: #10 steel≥28%

                                 #20 steel≥25%

Technological Characteristics of Cooling Staves

1.       special technology is used for casting to strengthen protection of internal pipe wall, no oxidization occurs, heat-conducting effect is guaranteed.

2.       Core sample characteristics: tensile strength≥350Mpas, elongation>8%, content of ferrite>70%, nodularization grades: grade 4-5, graphite size: grade 4