What is ASME BPVC Section IX?
“Section IX of the ASME Boiler and Pressure Vessel Code relates to the qualification of welders, welding operators, brazers, and brazing operators, and the procedures that they employ in welding and brazing. . . “
Which test is required for fillet weld procedure qualification as per ASME Sec IX?
ASME IX requires pressure containing fillet welds to be qualified by a butt weld procedure qualification test.
What is the qualification range for pipe thickness in ASME IX?
3/8 inch (10mm) or less, more than 3/8 inch (10 mm), but less than 3/4 inch (4.8 mm), or 1 1/2 (38mm) or thicker. That determines the range of thickness qualified for the base metal.
What are the maximum acceptance criteria for bend test specimens?
Acceptance Criteria on ASME Section IX Bend Tset Any formation of crack and other discontinuity less than 1/8 inch will be acceptable. If there is a crack more than 1/8 but started from the edge of the test specimen, then will be acceptable.
Which welding test position is a qualification for all positions per the ASME IX code?
the horizontal, vertical, and overhead positions shall qualify for all positions. Qualification in the inclined fixed position, 6G, shall qualify for all positions.
What does QW stand for in ASME?
QW – Qualified Welders.
What is backing in WPS?
Backing is defined as material placed at the root of a weld joint for the purpose of supporting molten weld metal. Its function is to facilitate complete joint penetration.
What type of test is required for welder performance qualification?
The qualification of welders can be accomplished by making radiographs or by using bend tests, as required by many welding codes.
What is thickness range in WPS?
If the welder qualifies WPS, in between 38 to 150mm thickness of the test piece, it means the welder qualify for a minimum thickness of 5mm, and the maximum thickness of 200, and their maximum deposited weld metal thickness shall be 2t when deposited weld metal thickness less than 19 mm (when t < 19).
What is maximum pass thickness in welding?
You are permitted to deposit a single pass thicker than 1/2 inch with any welding process if you are willing to qualify the procedure to demonstrate you can do it and meet pass all the requisite test requirements.
What is a Nick break test?
The Fracture or Nick Break Test is used to determine the quality of a weld, and involves breaking open the weld length-wise, and then visually inspecting the exposed weld interior for any internal imperfections such as lack of sidewall fusion, lack of inter-run fusion and porosity.
Is code for bend test?
ISO 7438:2016 specifies a method for determining the ability of metallic materials to undergo plastic deformation in bending. ISO 7438:2016 applies to test pieces taken from metallic products, as specified in the relevant product standard.
What is the difference between PQR and WPS?
WPS serves as a blueprint for a written instruction or guide on how to create a welded product based on a certain standard and quality. Meanwhile, PQR is a document that checks whether the standard is being followed by inspecting and answering the document regarding specific areas and tests.
What is the test position where the axis of the pipe is at 45 degrees and the pipe is not rotated while welding?
6G Position In the 6G welding position, the pipe slopes at approximately 45° from the horizontal (X) axis or 45° from the vertical (Y) axis. The pipe is in a fixed position, so the welder must move around the pipe to perform the welding.
What P number is 9 Chrome?
Base Metals: The P Number
|P Number||Base Metal|
|15E||9 Chromium, 1 Molybdenum|
|16 to 20||Not Used|
|21||High Aluminum Content (1000 and 3000 series)|
|22||Aluminum (5000 series – 5052, 5454)|
What is F number in welding?
The F number grouping of filler metals refers to their similarity on their usability characteristics. The usability determines the ability of a welder to deposit a sound weld metal with a certain filler metal.
What is QW in WPS?
Base metals (QW-403) This section describes the base metal for which the WPS can be used. All base metals have been assigned a P number which is related to the metals chemical composition, weldability etc (see Table 1). The WPS can be valid for a single metal or a range of metals.
Why WPS is required?
A Welding Procedure Specification is essential for every welding company to have because it maintains quality standards across every weld. It isn’t just a nice guide to follow. Under various Australian and international standards (eg. ISO 15612, ISO 15609), a WPS is required to ensure a stable weld.
What are the two types of welding test?
Weld Testing can broadly be broken down into two different types; non-destructive testing (NDT) and destructive testing.
What are P numbers in welding?
A P-Number is an alphanumeric designation assigned to a group of materials. These materials are grouped based on their similar weldability and mechanical characteristics. P-Numbers are assigned to base metals to reduce the number of welding and brazing procedure qualifications required to perform work.
What is ASME B31-pressure piping?
ASME B31 – Pressure Piping – A survey of one of the most important pressure pipe codes – ASME B31, earlier known as ANSI B31 ASME B31.9 – Working Pressure and Temperature Limits – The working pressure and temperature limits of ASME Code B31.9 – Building Services Piping
How many questions are on the ASME power piping test?
Candidates seeking the endorsement shall pass a written examination consisting of 55 multiple choice questions in two hours. Candidates must use the ASME B31.1 (Power Piping), ASME B31.3 (Process Piping), and Section IX of the ASME Code to answer the questions. No addenda are applicable.
When should the high pressure rules in ASME Chapter IX be used?
When Should the High Pressure Rules in Chapter IX of ASME B31.3 be Used? The simple answer to this question is they should be used when the owner selects the use of these rules for a particular piping system. Note that the definition of High-Pressure Fluid Service simply requires that the owner specify use of Chapter IX.
What is the pneumatic test pressure of the piping system?
The pneumatic test pressure shall not be less than 1.2 nor more than 1.5 times the design pressure of the piping system. It shall not exceed the maximum allowable test pressure of any non-isolated component.