Preservation store

1, stainless steel plate storage with carbon steel and other raw materials have strict isolation measures, stainless steel plate

With the stainless steel plate between the wooden bar spacing;

2, lifting and rolling stainless steel to avoid dragging on the ground.

Stainless steel storage tank process requirements:

1, steel plate lifting, to prevent steel plate deformation. The wire clip should be sheathed (with heavy cardboard) to prevent damage to the surface of the material.

2. After stainless steel cutting, polish the surface of the groove until the metallic luster is revealed. 3. Clean the plate rolling machine before rolling the cylinder body to remove the iron ion material on the surface; cylinder

Body offset ≤0.6mm.

4, the temporary wedge iron, cushion plate and other equipment in contact with the surface of the shell should be selected and the stainless steel material suitable for the shell:

5, vertical ring seam positioning weld length 20mm, spacing 200mmm.

6. Strong assembly of stainless steel pressure vessels is strictly prohibited, and tools that may cause iron ion pollution may not be used during assembly; The opening of the container should be plasma or mechanical cutting method.

Welding assembly requirements

1. Spatter is cleaned with chisel, and polishing machine is strictly prohibited;

2, the groove surface and its two sides of 30 to 40 mm range of oil, impurities

Such as cleaning;

3, the vertical and ring seam internal manual arc welding, the last ring seam with a pad, manual welding for the bottom, the outer 100m m range of anti-splash coating, from the process point of view to take measures to smaller welding specifications (generally about 90% of carbon steel) welding, multi-channel multi-layer welding, strict control of the temperature between layers (< 60C), the deformation tendency is reduced; Sectional welding is adopted to reduce the tendency of local deformation.

4, roller frame roller with plastic or cloth wrap. Prevent steel from contacting the cylinder directly and “polluting” the cylinder, and pay attention to it when hoisting.

The quality of spot welding should be ensured during positioning welding, and welding defects such as stoma, crack and slag inclusion should not occur. If the above defects occur, they must be removed and repaired before normal welding. 5, the cylinder is calibrated, and the roundness meets the requirements of GB150.

6, all nozzle and flange, support plate, nozzle and cylinder welding should be coated with anti-splash liquid,

Welding spatter, oxide and other impurities on the surface should be removed.

7. The surface quality requirements of welded joints are as follows:

7.1 The shape, size and appearance shall conform to the technical standards and design drawings. 7.2 There shall be no surface cracks, incomplete welding, incomplete fusion, surface porosity, arc pit, unfilled and visible slag inclusion and other defects, and the slag on the weld and the splash on both sides shall be removed

7.3 The weld and the base material should be smoothly transferred.

7.4 No biting edges allowed.

Surface pickling requirements