Welding of Stainless Steels:
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…
The NDT (nondestructive testing) methods are:
Visual Inspection – VT
Liquid Penetrant Testing – LT
Magnetic Particle Testing – MT
Radiographic Testing – RT
Ultrasonic Testing – UT
Eddy Current Testing – ET (not used in field inspection)
Acoustic Emission Testing – AET (not…
TASKS DURING WELDING OPERATIONS
Welding inspection during welding operations should
include all the audit parameters to verify that the welding is performed to the procedures. Such tasks may include the following:
Establish a quality assurance and quality control team
with the welding organization.
Quality control items to assess:
ACOUSTIC EMISSION TESTING (AET)
Acoustic Emission Test is a type of Non – Destructive Test method generally used for detecting and locating imperfections in mechanically loaded structures or components.
Flaw origination and progression in a stressed component can be identified by acoustic emission test method.This…
Preheating in Welding Procedure Specification:
Preheating is the act of heating the base metal before starting to weld. It is considered very essential in high thickness materials, Cr-Mo Steels & HSLA High Speed Low Alloy steels, etc…
Here we are going to answer the below topics
Welding – Process of joining similar metals (or thermoplastic).
By heating them to suitable temperature
May or may not require pressure
May or may not require Filler metal
Brazing -Process of joining dis-similar metals.
By Melting and pouring the filler metal and pouring…