744 – STRUCTURAL STEEL FABRICATION - GENERAL paragraph 6.14.5: For detecting discontinuities in non-magnetic mate rials including stainless steel to stainless steel or stainless steel to carbon steel, visible liquid penetrate testing (PT) will be used in lieu of MT. The standard methods, set forth in ASTM E 165 shall be used for PT inspection, a nd the standards of acceptance shall conform to Clause 6, Part C, of this code.
SUBSECTION 6.17 RADIOGRAPHIC TESTING (RT) - PROCEDURE Delete paragraph 6.17.9 and replace with the following: 6.17.9 FILM SIZE - When the joint thickness is less than 3 inches, radiographs shall be 4 1/2 inches x 17 inches in size. When the length of th e joint is such that more than one radiograph is required, one of the films may be shortened to 4 1/2 inches x 10 at the contractor option. When joint thicknesses are 3 inches or greater, the minimum film size shall be 7 inches x 17 inches. Larger radiogra phs may be required in areas where there have been excessive repairs or where there are joints with unusual dimensions. Delete paragraph 6.17.12 and replace with the following: 6.17.12 One radiograph identification number shall be painted on the steel no closer than 3/4 inch from the weld edge at each radiograph location. Corresponding lead numbers shall be superimposed on the painted numbers to produce an image on the radiograph. A combination of letters and numbers may also be used. Two location dots shall be painted on the steel at each radiograph location no closer than 3/8 inch from the weld edge. The dots shall be placed at a random distance from the steel plate edges which are pe rpendicular to the length of the weld. The dots shall be placed in different locations for each radiograph location. One l ead arrow shall be placed so that its tip is superimposed on each of the two location dots. A location letter shall be painte d immediately under each arrow and a lead letter shall be superimposed on each painted letter. When radiographs are viewed, only those films representing the same joint should have location arrows an d location letters perfectly superimposed. Any additional information shall be produced on the radiograph no less the 3/4 inches from the edge of the weld either by pre-printing or by placing lead letters and numbers on the steel. See Fi gures 1 and 2. Information required to be shown on the radiograph shall include: the complete KDOT bridge number, initials of the radiographic inspection company, initials of the fabricator, the fabricator's shop order number, the radiographic identification number, the date, and the weld repair number if applicable. Add a new paragraph 6.17.14: 6.17.14 Unless otherwise noted on the shop drawings all butt welds will be evaluated as tension welds.
paragraph references cited in the paragraphs below are to AWS D1.2-2014. Add 2 new subsections as follows: SUBSECTION 1.9 EQUIPMENT CHECK Each DC generator shall have a service check by an NEWA member, a commercial electrical equipment company or by the fabricating plant's electrical maintenanc e engineer once each year. A service certificate shall be issued with each equipment check and shall be available for inspection by the Engineer. SUBSECTION 1.10 TEMPORARY WELDING AND TACKING The attachment of temporary fabrication, erection and construction items to main members by welding or tacking is prohibited except by written permission from the Bureau Chief of Construction and Materials. Permissible locations for such welds and tacks sh all be only at locations shown on approved shop drawings or at locations designated in writing by the Engineer.
SUBSECTION 2.6 PLUG AND SLOT WELDS Add the following paragraph 2.6.9: Plug and slot welding is prohibited without the written approval of the Engineer. As a requirement for approval, all plug and slot welding shall be QC tested by nondestructive testing at no cost to the state. The type of testing shall be determined by the Engineer. SUBSECTION 3.1 GENERAL REQUIREMENTS – QUALIFICATION Revise item (5) as follows: Replace “those authorized to ex amine them.” with ”the Engineer.” Add 3 new paragraphs as follows: 744 – STRUCTURAL STEEL FABRICATION - GENERAL 700-159 3.1.1 All PQR tests must be witnessed by the Engineer, another state’s representative approved by the Engineer, or an independent third party approved by th e Engineer. If representatives from other states or third parties witnessed a test, provide records of the test signe d by the witness. All mechanical and nondestructive tests performed by independent laboratories on qualification specimens will be at no charge to the State. Provide signed documentation of the independent lab’s test results to the Engineer. When requested by the Engineer, allow KDOT access to the test samples and the indepe ndent lab’s radiogra phs for inspection. 3.1.2 All welder, welding operator, and tack welder tests must be witnessed by the Engineer, another state’s representative approved by the Engineer, or an independent third party approved by the Engineer. If representatives from other states or third parties witnessed a test, records of the test must be signed by the witness. 3.1.3 Additional Testing. The Engineer may order tests of welders, welding operators, tack welders, or WPSs whenever there is evidence that unacceptable welds are being or ha ve been produced. This additional testing is at the fabricator’s expense. The Engineer may disquali fy personnel working for the fabricator who fail the additional testing, who commit serious violations of the specifications, or who repeatedly exhibit poor workmanship on KDOT projects.
SUBSECTION 4.22 CONTROL OF DISTORTION AND SHRINKAGE Add the following to paragraph 4.22.4: Do not use mechanical straightening methods w ithout the approval of th e Engineer, even when used in conjunction with the application of heat.
SUBSECTION 5.1 INSPECTION – GENERAL REQUIREMENTS Add the following to the first section of paragraph 5.1.1: Fabrication/erection inspection by the contractor shall not be performed by an inspector or their assistants who are, or were previously, engaged in the welding, the general assembly, or the application of coatings.
SUBSECTION 5.10 RADIOGRAPHIC TESTING (RT) - PROCEDURE Delete paragraph 5.10.9 and replace with the following: 5.10.9 FILM SIZE - When the joint thickness is less than 3 inches, radiographs shall be 4 1/2 inches x 17 inches in size. When the length of th e joint is such that more than one radiograph is required, one of the films may be shortened to 4 1/2 inches x 10 at the contractor option. When joint thicknesses are 3 inches or greater, the minimum film size shall be 7 inches x 17 inches. Larger radiogra phs may be required in areas where there have been excessive repairs or where there are joints with unusual dimensions. Delete paragraph 5.10.12 and replace with the following: 5.10.12 One radiograph identification number shall be painted on the steel no closer than 3/4 inch from the weld edge at each radiograph location. Corresponding lead numbers shall be superimposed on the painted numbers to produce an image on the radiograph. A combination of letters and numbers may also be used. Two location dots shall be painted on the steel at each radiograph location no closer than 3/8 inch from the weld edge. The dots shall be placed at a random distance from the steel plate edges which are pe rpendicular to the length of the weld. The dots shall be placed in different locations for each radiograph location. One l ead arrow shall be placed so that its tip is superimposed on each of the two location dots. A location letter shall be painte d immediately under each arrow and a lead letter shall be superimposed on each painted letter. When radiographs are viewed, only those films representing the same joint should have location arrows an d location letters perfectly superimposed. Any additional information shall be produced on the radiograph no less the 3/4 inches from the edge of the weld either by pre-printing or by placing lead letters and numbers on the steel. See Fi gures 1 and 2. Information required to be shown on the radiograph shall include: the complete KDOT bridge number, initials of the radiographic inspection company, initials of the fabricator, the fabricator's shop order number, the radiographic identification number, the date, and the weld repair number if applicable. Add a new paragraph 5.10.14: 5.10.14 Unless otherwise noted on the shop drawings all butt welds will be evaluated as tension welds.