This test will be set up and conducted by site supervisor and the procedures in brief are as follows : – 1. Before test, the ends of the pipeline are plugged using expanding disc stoppers and one end is connected with a U-tube manometer.2. Air is to be pumped into the pipeline until a test …
These tests are used to determine the permeability of the soil stratum at various levels below the groundwater table. The site supervisor should record the results and phenomenon during the test and hand into the Geological Engineer for assessment. The preparation work and principle of the various tests are as follows: – Preparation work :1. …
This test is used to find out the apparent path of water leakage at the tidal zone or from high level to low level. Place the dyed water in the water inlet and record the location and time of test. The site supervisor should inspect the surrounding area, which may be quite remote from the …
This is a non-destructive test for the examination of a fillet weld by magnetic particle flaw detection. The test could indicate the cracks and surface pores on the weld for visual inspection.
This is another non-destructive test ( NDT ) to examine the quality of a butt weld and is to be conducted by specialist staff from an approved testing consultant. The ultrasonic test results in the graph should be printed out and submitted to the Engineer for record purposes. The site supervisor may be asked to …
Beside the mechanical splicing with bolts and nuts, the longitudinal connection for structural steel members may be by means of butt welding. Butt welded joints deployed on main structural members such as for pipe pulling should be examined by radiographic tests to inspect the quality of the finished welds. These tests must be conducted by …
1. To determine the dry film thickness ( DFT ) by Paint GaugeFor structural steelworks, no matter at indoor or outdoor, it always requires anti-corrosion protective coatings to cover up the members such as hot dipped galvanizing. In addition to these galvanized coating, sometimes a painting system is also applied on the steel members for …
Some of the superimposed steel structure is fixed to the welded base plates that are held by the holding-down bolts. In the best case, these holding-down bolts are cast in with anchorage ( e.g. fish-tail end ) and embedded into concrete. However in some cases, particularly for pre-cast concrete units, these holding-down bolts are sometimes …
The mechanical splicing and fixing of structural steel members always require the fastening of the sets of bolt, washer and nut, and the degree of tightening or the torque achieved has to be checked by the site supervisor to ensure the set of components is adequately secured. The specification may state the required torque value …
Concrete cover to the steel bars inside a concrete pour is critical to the durability of reinforcement for the structure. Once the Engineer is in doubt, it may require to conduct a Cover Metre Test to verify the as-cast concrete cover to the reinforcement to see whether the condition is acceptable. During casting, the concrete …
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