Nondestructive Testing service providers

  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 specification for all welding processes. Nondestructive Examination – ASME Section V A. Article 1, General Requirements: The Welding Inspector should be familiar with, and understand The Scope of Section V Rules for use of Section V Responsibilities of the Owner / User and Subcontractors Calibration, Inspection and Examination Record Keeping Requirements B. Article 2, Radiographic Examination: The Scope of Article 2 and General Requirements, The Rules for Radiography applied on butt welded seams: Required Marking; Type, Selection, Number, and Placement of IQI’s; Allowable Density and Density Ranges; Control of Backscatter Radiation; 3. Recording of inspection; C. Article 6, Liquid Penetrant Examination (I...

  Fillet Weld Positions The advantage of the fillet-welded joint is that it’s unnecessary to prepare the edges of the plates or sheets for welding. Double fillet-welded joints are an improvement over single-fillet joints because they can withstand loads from more than one direction. Three of the five basic types of joints –  the lap, the T-joint and the corner joint  – can be joined with fillet welds. Flat Fillet Weld Position – 1F The axis of the flat position fillet weld is either horizontal or inclined not more than 15° to the horizontal. The surfaces of the plates are each inclined at about 45° to the horizontal. The face of the weld is on top. The typical flat-position fillet weld is similar to the flat-position groove weld. The difference is in the positions of the plates forming the joint. Horizontal Fillet Weld Position – 2F In this position, both the axis of the weld and the lower plate of the joint assembly are horizontal. For the  T-joints and inside corne...

  Standards for Welding Positions : It is very important for the Weld Inspector  to know the position , or location of a joint relative to the horizon, because it may determine what welding process, methods, and techniques can be used. Welding is usually easiest when the welder can work on a joint located on a flat, horizontal surface, such as on a table or bench. However, joints in the field may be located in a variety of positions relative to the welder and to the horizon, as shown below.  1)  Welding positions – AWS D1.1, European Welding Standard EN 287 – 1, ASME IX: 2) Welding Positions – Butt, Fillet and Piping Welds: Flat Butt Weld Position – 1G In this position, the axis line of the weld must  not incline more than 15°  from the horizon and the face of the weld must be on top. Welders often refer to the flat-position welding by the nonstandard term  downhand welding. Horizontal Butt Weld Position – 2G In this position, both plates are perpendic...