Welding of Stainless Steels:
General Concepts:
Stainless steels, resumed here in a general way, are defined as steel alloys, where the chromium content ranges from 10.5% to 30%. There are five distinct types of stainless steel:
Here are some rarely used NDT – Few Other Methods
1. Eddy Current Testing – ET:
Eddy-current inspection uses electromagnetic induction to detect flaws in conductive materials. A circular coil carrying current is placed in proximity to the test specimen (electrically conductive). The alternating current in…
We would see about Recommendations for Welding of Structural Steel as per AWS D1.1 , 2020 revision
Groove Weld: (Clause 4.4.1)
Weld Length : shall be the width of the parts joined , perpendicular to the direction of compressive or tensile stress,
Weld Size: Thickness of thinner…
The sole purpose of welding procedures is to describe the details that are to be followed in the welding of specific materials or type of joint. The following is a list of standard specifications for welding procedures that are normally covered in welding procedures…
Positions for Welding Pipe
For welding pipe in shops, power plants, oil refineries, and chemical plants for crude oil, gasoline, and natural gas, the same basic welding positions described previously are used.
Flat Butt Weld Pipe Position…
Equipments and materials for NDT lab set up
Radiography Testing:
1) X-Ray tube head -450 kV capacity ( only if construction of a exposure room with approval from government is possible)
2) RT Films (D4 )
3) lead screen 0.125mm, 0.25 mm
4) Film casettes
5) set of IQI -wire…
Acceptance Criteria for Liquid Penetrant Testing -LPT as per ASME , AWS and API standards
Liquid penetrant testing simply called as PT. Sometimes Dye Penetrant Testing is a surface defect detection NDT method and is more sensitive to all kind of surface defects, such as…
What is a cast iron?
Cast iron are ferrous alloys with greater than 2% carbon.
They also contain small amounts of other materials such as silicon, sulphur, manganese, & phosphorous.
In general it consists alloys of carbon & iron.
They are the least expensive of all metals and…
The following should be considered when selecting equipment for magnetic particle testing.
Is equipment for wet or dry method?
Magnetization requirements (AC or DC)
Demagnetization- incorporated or separate unit?
Ampere required.
Line voltage requirements.
Accessories needed or required.
WET HORIZONTAL EQUIPMENT
To obtain circular magnetization, the…