1. Common quality problems:
A. The surface brightness of the pipe is not enough, the color is dark, and the surface of the titanium-plated pipe has a large color difference.
B. The overall rigidity of the railings and handrails is not enough, and the hand rubbing the stainless steel handrails has a trembling feeling.
C. The columns are not vertical, the arrangement is not on the same line, and the shaking is not strong.
D. The stainless steel handrail is not smooth.
E. There is a gap in the pipe joint.
F. The arc-shaped handrail arc is not smooth and has a rib.
G. The wall of the weld is polished and the polishing degree is not enough.
H. There are scratches and pits on the surface.
2. Prevention measures:
A. First, the quality of the pipe should be selected. Different grades of tubing contain different amounts of elements. Even if titanium is plated in the same factory, the surface color of the finished product is also different. Therefore, attention should be paid to the selection of stainless steel pipes of the same category and grade, and the quality management of the titanium plating process should be strengthened.
B. Because the wall of the pipe is too thin, the overall strength is insufficient. The pipe with wall thickness ≥1.2mm should be used as the stainless steel handrail. The pipe diameter of the riser should not be too small. When the length of the straight section of the stainless steel handrail is long, the design of the column should have lateral stability and strengthening measures.
C. The bullet line is not allowed and the installation method is improper. The construction must be accurately elasticized. First, use the horizontal ruler to correct the reference columns at both ends and fix it. Then pull the line to fix the columns according to the positioning of each column. Before the welding, the embedded parts should be inspected and found that the buried rods with problems should be reinforced. The expansion bolts used to secure the column base should be prevented from being too short, or the cement mortar layer under the facing stone should not be full. Quality inspections of each construction process should be strengthened to correct quality problems in a timely manner.
D. Processing technology is not high. Straight-angle elbows produced by professional factories should be used as much as possible. Non-standard angle bends can be specially processed according to the detailed plan of construction. Processing plants should have dedicated production equipment.
E. The welding should be fully welded. An experienced welder should be assigned to work in strict accordance with the operating procedures. It is best to use a lined casing.
F. Because the special equipment is not used for forming, the column positioning is not accurate. Factory processing with special equipment should be selected, and quality inspection of processed components should be strengthened to prevent non-conforming products from flowing into the construction area.
G. Because the wall thickness of the selected pipe is too thin, it is easy to be concave when the elbow is machined, and the roundness of the pipe is changed. There is no additional bushing pipe added during the butt welding so that the weld is smoothed after welding. It is easy to penetrate the pipe wall at one end of the drum. Pipes of appropriate thickness should be used, and it is best to add inner bushings for butt welding.
H. The finished product is improperly protected and is collided and scratched by objects during the cross work. The construction process should be arranged reasonably. It is best to arrange the installation work of the stainless steel handrails to the later stage. The finished railing handrail should be properly isolated and protected to prevent foreign objects from colliding and scratching.