WASHINGTON, D.C.. Document Name: CFR Section(s). Standards Body: e. American Petroleum Institute. API Tank Inspection, Repair, Alteration, and. This standard covers steel storage tanks built to API and its predecessor API 12C. It provides minimum requirements for maintaining the integrity of such. everyday working knowledge of API Standard and the applicable reference API Standard , Tank Inspection, Repair, Alteration, and Reconstruction.
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API Tank Inspections. Why Inspect Your Tanks Certified API Inspector Worldwide Standard for Above Ground Storage Tank Design and. New Tank. API STANDARD repair organization: An organization that meets aboveground storage tanks. The storage tank engineer, by 01 any of the. 5 days ago Inspection Repair Alteration And [PDF] [EPUB] API Standard Tank Inspection , Org (PDF) API * Piping Inspection Code: In-Service.
What is the position designation for welding pipe in the horizontal fixed position? Nick breaks are used only on pipe. A procedure is qualified on plate.
ASME does not allow nick breaks. Four nick break specimens were substituted for the four side bends. Which of the following thicknesses is not qualified? What welds can he make on the tank if he is qualified in the 6G position? Two tension specimens were required. A pipe welder is qualified to API only.
The procedure is qualified. A welder is qualified in the 3F and 4F positions. Which of the following groove welds can he make? The butt welded seams that are covered. The repair plate may be circular. And Reconstruction. Notes on Patch Plates. First Addenda. The radius of the corners shall be 2 in. The lap patch is considered a permanent repair and subject to ongoing inspection and maintenance. Lap Patches Considerations: Does the owner prohibit the use of a lap patch?
The first 11 paragraphs apply to lap patches generally. All the repair material must conform to the requirements of API Since the inception of API Para 9. Figure An ultrasonic inspection for laminations and other plate defects shall be performed on the shell plate in the areas to be welded. Repair plates shall not be lapped on lap welded shell seams.
An internally installed patch must be located such that the toe-to-toe weld clearances are a minimum of 6 inches to the shell to bottom weld. Shell openings and reinforcements shall not be positioned within a lapped patch shell repair. The maximum size of a patch plate is 48 inches by 72 inches. The patch shall be formed to the shell radius. Refer to Figure for details on welding the lap patch to the shell to bottom joint. A lap patch may be used for the closure of holes. The repair plate shall not exceed the nominal thickness of the shell plate adjacent to the repair.
A full equal leg fillet perimeter weld is required. The minimum repair plate dimension shall be 4 in. Nozzles and reinforcement pads must be removed entirely before the repair plate is installed. The repair plate thickness shall be based on API Repair plates. The remaining strength of the deteriorated areas under the repair plate shall not be considered as effective in carrying the calculated service or hydrotest loads.
The next 5 paragraphs apply to the use of lap patches to close holes in the shell. The overlap of the repair plate shall not exceed 8 times the shell thickness.
To install a lap patch over a leak. The repair plate must be designed to withstand the hydrostatic pressure load between the repair plate and the shell assuming a hole exists in the shell using a joint efficiency of 0. The weld shall be continuous on the inside and outside of the patch plate. Lap patches may be used to reinforce areas of deteriorated shell plates and to reinforce shell plates that are below retirement thickness.
All fillet welds shall be full equal leg fillet welds. Lap patches may be used to repair leaks or minimize the potential leaks form pitting. Future inspection must be performed on the patch plates. Do not use a lap patch if the repair plate will prevent gas freeing the tank to perform future hot work. Do not use a lap patch if corrosion between the shell plate and repair plate is likely to occur. The last 3 paragraphs apply to safety warnings and inspection requirements of lap patches.
Solve for A: What is the Square Root of ? What is the radius of a circle whose diameter is '? What is the area of the circle in Question 7? Solve for Z: An inspection is performed on an existing AST 67' tall. What is the minimum thickness of the first course. What is the minimum thickness of the fourth course of the tank in question What is the design first course thickness of a new tank that is 60' tall. What is the annular plate thickness of the new tank in question What is the hydrostatic test first course thickness of the new tank in question 18?
What is the minimum thickness of the first course of an existing tank if the nameplate reads as follows: A Specific Gravity: Use the formula. Answers will be discussed at the beginning of class the following morning.. The following is a collection of questions remembered by various students who took the API Exam in the past. API Practice Exam. Section QW only B Beeggiinn tthhee ooppeenn bbooookk ppoorrttiioonn ooff tthhiiss eexxaam m oonn tthhee nneexxtt ppaaggee. Welding in the 3G position qualifies a welder in what positions?
Flat and horizontal Horizontal and vertical Flat and vertical Vertical and overhead A change in groove design A change in backing A change in post weld heat treatment A change in electrode angle A welder may be qualified by RT if 1.
The liquid penetrant examination method is an effective means for detecting 1.
Welders shall be qualified in accordance with 1. Geometric unsharpness of the radiograph of a component under 2" thick shall not exceed. What is the maximum allowable prod spacing using an AC prod technique?
Based on the above information should a repair be made? Ultrasonic examination of hot tap connections or reinforcement is required by API when. The required thickness of the shell in this area is 0.
What is the maximum permissible height for the bulge? Calculate the minimum thickness for the third course. Assume pit depth of one-half of the minimum acceptable tank shell thickness. N Noottee:: Assume pit depth of slightly less than one-half of the minimum acceptable tank shell thickness.
Because the pits are aligned vertically no repair is required Scattered pits may be ignored If the pit is round. Calculate the minimum thickness of the first course based on product alone. There is one area of general internal corrosion on the south side of the shell 20" wide and 20" in vertical length.
The pits measure. The diameter of the pits are 1.
There is evidence of bottom settlement. TThhee ffoolllloow w:: What is the hydrostatic test height of this tank based on a minimum thickness found in question An area of edge settlement in the tank bottom 6' from the shell has sloped down and settled. A more rigorous stress analysis must be performed The area should be repaired Sloped edge settlement is usually no problem The area should be documented and checked during the next inspection Yes No Not enough information given The tank holds water.
Should a repair be recommended? The settlement measures 2" at the deepest point. The bottom lap welds are approximately parallel to the shell. Using data from above. Grade 70 A M Grade The material of construction is A A DC yoke shall have a lifting power of at least 1.
Weld build-up the area. Hydrostatic test stress Does the procedure need to be requalified? A new tank will hold a product with the specific gravity of 1. Use RBI. What is the thickness required for the annular plate? Include corrosion allowance. What type of repair. When using the SMAW process.
The thickness of the first course is 1. Because the product might not contaminate the soil or waterways. During an MT examination.
The corrosion allowance is. Floating roofs on new tanks shall be sufficiently buoyant to remain floating after 1. Fifteen inches of rainfall in a hour period Ten inches of rainfall in a hour period Thirty inches of snow in a hour period Thirty inches of sand in a hour period A sudden rapid fracture under stress.
The shell material is A 36M. During a welder qualification test. If the supporting PQR is used. Each floor scanning operator.
SFA 5. Section IX. Weld Symbols or Written Description should show the general arrangement of the parts to be welded. Production Drawings.. Class E F-No. Analysis and Mech. Where applicable. Welding Process es: SMAW Type s: P 1 Date: Thickness Range: Base Metal: This information may be listed in a tabular form similar to that shown below. Torch Angle.
Interpass Temp. Hot Wire Addition..
Spray arc. Procedure Qualification Record No. Width 1 Impact Values Lateral Exp SIGNED Detail of record of tests are illustrative only and may be modified to conform to the type and number of test required by the Code Tests conducted by: Laboratory Test No API Practice Exam JP We certify that the statements in this record are correct and that the test welds were prepared Please close all materials. TThhee sseeccoonndd ppaarrtt ooff tthhee eexxaam Booookk.
Who has the ultimate responsibility for complying with the provisions of API Standard ? You can change your cookie settings through your browser. Request Free Trial. Chinese English. Please note: It provides minimum requirements for maintaining the integrity of such tanks after they have been placed in service and addresses inspection, repair, alteration, relocation, and reconstruction.
The scope is limited to the tank foundation, bottom, shell, structure, roof, attached appurtenances, and nozzles to the face of the first flange, first threaded joint, or first welding-end connection.
Many of the design, welding, examination, and material requirements of API can be applied in the maintenance inspection, rating, repair, and alteration of in-service tanks.
In the case of apparent conflicts between the requirements of this standard and API or its predecessor API 12C, this standard shall govern for tanks that have been placed in service.
This standard is intended for use by organizations that maintain or have access to engineering and inspection personnel technically trained and experienced in tank design, fabrication, repair, construction, and inspection. This standard does not contain rules or guidelines to cover all the varied conditions which may occur in an existing tank.
When design and construction details are not given, and are not available in the as-built standard, details that will provide a level of integrity equal to the level provided by the current edition of API must be used. This standard recognizes fitness-for-service assessment concepts for evaluating in-service degradation of pressure containing components.