6.10　Portfire Device

6.10.1　The installation of portfire device shall be in accordance with the following requirements:

1　The column elevation shall be adjusted and checked by level and steel ruler with tolerance of±5.0mm，height differential for adjacent column with tolerance of 5.0mm；

2　The longitudinal centerline of ignition furnace and of column of insulation furnace shall be adjusted based on longitudinal centerline of head wheel of sintering equipment，and checked by wire/thread and ruler with tolerance of 2.0mm；

3　The transversal centerline of ignition furnace and of column of insulation furnace shall be adjusted based on axial centerline of head wheel of sintering equipment，and checked by wire/thread and ruler with tolerance of 2.0mm；

4　The verticality of column shall be adjusted and checked by theodolite or ruler and thread pendant with tolerance of 1.0/1000；

5　The difference of length and digonal between lower part and upper part of support shall be adjusted，and checked by wire/thread and ruler with tolerance of 5.0mm；

6　The elevation of water cooling baffle and water cooling box shall be adjusted，and checked by level and steel ruler with tolerance of±5.0mm；

7　The centerline of water cooling baffle and water cooling box shall be adjusted，and checked by wire/thread and steel ruler/tape with tolerance of 5.0mm；

8　The centerline of burner shall be adjusted，and checked by wire/thread and steel ruler/tape with tolerance of 3.0mm；

9　The elevation of burner shall be adjusted，and checked by level and steel ruler with tolerance of±5.0mm.

6.10.2　Match between welding material and base metal shall meet the design requirements.Welding material shall be dried and stored before using in accordance with product instructions and welding process document.

6.10.3　Welding quality for furnace body must meet requirements of design technical document；if no requirements in design document；it must meet requirements ofⅣclass in current national standard GB 50236 Code for Construction and Acceptance of Welding Engineering of Field Equipment and Industrial Pipe.

6.10.4　Hydraulic test of water cooling baffle and water cooling box shall be in accordance with the following requirements:

1　Hydraulic test of water-cooling baffle and water-cooling box shall be carried out after installation of equipment and before masonry；

2　Hydraulic tests of water-cooling baffle and water-cooling box shall be in accordance with design document or with following previsions 3-6 if not provided for in design；

3　The test pressure shall be 1.5 times of the working pressure，which shall be kept for 10min before reduced to working pressure.Then the pressure shall be maintained at the working pressure for 30min，it is qualified if no pressure drop and no leakage；

4　At least 2 pressure gauges for pressure test shall be available，which shall be calibrated to be qualified with precision grade not lower than 1.5 grade，the full scale value of which shall be 1.5-2 times of test pressure；

5　Clear water shall be used for hydraulic test with ambient temperature not lower than 5℃，otherwise the antifreezing measures shall be adopted；

6　The pressure shall be increased step by step slowly，which shall not be increased to test pressure in one time.