Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
WELD PREPARATION: Joint Tolerance & Cleaning
Joint Tolerance
The allowable tolerance of joint dimensions depends upon whether the welding is to be done manually or by mechanised means. Manual welding applications can tolerate greater irregularities in joint fit up than mechanised welding. The particulartolerance of a given application can be determined only by actual testing, and this tolerance should be specified for future work.
Cleaning
Cleanliness of both the weld joint areas and the filler metal is an important consideration when welding with the gas tungsten arc process. Oil, marking crayon,grease, shop dirt, paint, & rust or corrosion deposits all must be removed from the joint edges and metal surfaces, to a distance beyond the heat affected area. Their presence during welding might lead toarc instability and contaminated welds containing pores, cracks and inclusions. Cleaning may be accomplished by mechanical means, by the use of vapour or liquid cleaners, or by a combination of these. Organic solvents like carbon tetrachloride should not be used as any trace of it coming under the arc may lead to the formation of phosgene, a toxic gas. Acetone may be used.
Explain desirable properties of modeling and differentiate between the process of casting and modeling. Also highlight the advantages and disadvantages of casting process and model
Type of strain: There are basically four type of strain 1. Tensile strain 2. Compressive strain 3. Volumetric strain 4. Shear strain
Plastic material and rigid plastic material: For the plastic material, there is stress at which plastic deformation begins. A rigid plastic material is one in which the ela
Q. Ventilation process of plant? Due to the possibility of accidental discharges of flammable gas and flashing liquid (e.g. leaks, incorrect valve opening, sampling, etc.); ade
Q. Explain Sulphidation process? The presence of sulphur converts the surface of the metal to a sulphide scale which is generally more destructive than an oxide scale. Sulphid
send me pipe designing material
What are the primary benefits of using computerized layout procedures vs. Systematic Layout Planning (SLP) procedures done by hand?
Thrust: The net force exerted by a liquid on any shield in contact with it, is called as thrust of liquid. Pressure: The thrust operated by a liquid per unit area of the fie
how to calculate Air velocity , pressure and power done by aircraft fans
How a turbine works
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd