Titanium pipe weld detection

NDT is in working condition under the premise of no damage to the workpiece and raw materials, the surface of the parts to be tested and internal quality inspection means of a test.titanium cn
Commonly used NDT methods: X-ray flaw detection, ultrasonic testing, magnetic particle testing, penetration testing, eddy current flaw detection, gamma ray flaw detection and fluorescence detection, such as coloring flaw detection method.
Weld penetration test methods and defect classification of mark of trace
Theme content and scope of application
This standard specifies the weld and adjacent parent metal surface defect inspection method (fluorescent dye penetrant inspection and test) and defects
Grading of marks.This standard applies to the following metal surface defects of weld inspection:
use nonmagnetic material welding seam;
the fillet weld of magnetic materials and magnetic particle inspection have difficulty or weld inspection result is bad, such as double docking weld root in the process of inspection, etc.Penetration testing method
Weld penetration inspection personnel should be according to the provisions of the relevant disciplines through strict training and examination, and a corresponding appraisal organization
The level of qualification certificates;Weld penetration inspection personnel's vision should be checked once a year, vision correction shall be not less than 1.0, no color blindness and blindness.

Inspection fluid including agent, penetrating agent, emulsifier, detergents and imaging should be inspection welding seam and its effect on the mother material without corrosion.
When inspection nickel alloy welding seam, each agent of liquid sulfur content should not exceed with analysis of the proceeds of the residues of 1%;When the austenitic stainless steel or titanium alloy weld inspection, each of the testing liquid chlorine and fluorine content should not be more than the sum of use
You should use the same manufacturer production of the same series of form a complete set of testing liquid, different kinds of testing are not allowed to be mixed fluid.
After inspection of weld with coloring method, and fluorescent inspection if required, must be conducted only after the clean up.
In order to control the quality of the liquid penetration inspection need, can according to
Checked the surface pretreatment parts of, it includes weld surface and on both sides of weld surface of the adjacent area of at least 25 mm;Using mechanical method (such as grinding) clearance were surface welding slag, weld spatter, rust and scale;By adopting the method of solvent (water or cleaning agent)
Cleaning were found on the surface of the grease may cover surface defects such as chip, fiber shows or interference inspection of foreign material.Not allowed to use sandblasting, shotblast may block surface defects such as cleaning method;When the weld welding wave or other surface irregular shape affects a penetrant inspection, should be polished smooth.After cleaning the surface of the strong rely on natural evaporation or with the appropriate hot air so that it is fully dry.
Usable dip, brush, spray any kind of methods, such as applying penetrant;For osmotic treatment temperature for 15 ~ 50 ℃, infiltration time shall not be less than 5 min or specified in the instructions for use of penetrating agent use penetrating time.In the infiltration time, should maintain the penetrating agent checked surface wetting, when the temperature in the range of 3 ~ 15 ℃, the time should be appropriately increased permeability according to temperature condition, less than 3 ℃ or above 50 ℃, shall consider the decision, and note it in the inspection report;Wash the treatment and removal.