GOST R ISO 10332-99
GOST R ISO 10332−99 pressure steel Tubes seamless and welded (except pipe manufactured by arc welding under flux). The ultrasonic method of testing
GOST R ISO 10332−99
Group В69
STATE STANDARD OF THE RUSSIAN FEDERATION
OF STEEL PIPE PRESSURE SEAMLESS AND WELDED (EXCEPT PIPE MANUFACTURED BY ARC WELDING UNDER FLUX)
The ultrasonic method of testing
Seamless and welded (except submerged arc-welded) steel tubes for pressure purposes. Ultrasonic testing for the verification of hydraulic leak-tightness
OKS 19.100
AXTU 0009
Date of introduction 2001−01−01
Preface
1 DEVELOPED AND SUBMITTED by the Technical Committee for standardization TC 132 «Technical diagnostics"
2 ADOPTED AND put INTO EFFECT by the Resolution of Gosstandart of Russia from December 23, 1999 N 673-St
3 this standard is the authentic text of international standard ISO 10332−94* «steel pressure Pipe seamless and welded (except pipe manufactured by arc welding under flux). The ultrasonic method of testing"
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* Access to international and foreign documents referred to here and hereinafter, can be obtained by clicking on the link to the site shop.cntd.ru. — Note the manufacturer’s database.
4 INTRODUCED FOR THE FIRST TIME
5 REISSUE
Introduction
This standard applies to the ultrasonic method of testing welded steel pipes (except pipes, made by arc welding under flux).
The standard sets requirements to the procedure of using methods of ultrasonic inspection, requirements for personnel conducting monitoring, and the basis of the relationship between the consumer and the manufacturer of the pipes.
1 Scope
1.1 this standard establishes requirements for the method of ultrasonic testing of seamless and welded steel pressure pipes, except pipe manufactured by arc welding under flux.
1.2 this standard applies to pipes with external diameter not less than 168.3 mm and a ratio of outer diameter to the pipe thickness not less than 5. By mutual agreement between consumer and manufacturer, this standard can be used for pipes of smaller diameter.
2 Normative references
The present standard features references to the following standards:
ISO 235−80* Drill with cylindrical shank short and medium series drills and Morse taper shank
ISO 286−1-88* Tolerances and planting the ISO. Part 1. The main provisions of tolerances, deviations and landings
ISO 9302−89* pressure seamless steel Pipes and steel (also manufactured by arc welding under flux). The electromagnetic method to check for leaks
ISO 12094−94* welded steel Pipes-pressure. Ultrasonic inspection to determine delamination in strip (sheet) material, used for manufacturing welded pipes
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* International standards — in VNIIKI of Gosstandart of Russia.
3 General requirements
3.1 Ultrasonic testing, regulated by the standard, usually put the pipe after completion of all production operations affecting their thickness.
Monitoring should be conducted by personnel certified (certificated) in accordance with a valid certification and is assigned by the manufacturer.
In the case of control by a third party this must be agreed between customer and manufacturer.
3.2 Curvature of the pipe and the condition of the surface must meet the requirements of the applicable instruments ultrasonic testing.
When using contact and induction welding spatter on the inner and outer surfaces of the pipe must be removed.
4 Method of control
4.1 in the control of pipe integrity using the ultrasonic method.
4.2 During the inspection pipe must be scanned in two opposite equidistant spiral lines, if other areas are not consistent between the consumer and the manufacturer.
Note — On both ends of the tube there is a short cut, which cannot be controlled.
4.3 In a test tube and (or) ultrasonic transducer must move relative to each other so that the entire pipe surface is scanned.
In the case of welded pipe (excluding pipe welded drawn) by mutual agreement between customer and factory testing is carried out only in the welding area. In this case, you must be scanned the entire length of the weld.
4.4 the Maximum size of each of the applied ultrasonic transducer, measured parallel to the axis of the tube should not be more than 25 mm.
4.5 Ultrasonic unit must ensure that grading of pipes (good and bad) through automatic operation at set value rejection level combined with a marking system and (or) sort.
Note — the control use one or more ultrasonic transducers describe a helical path on the surface of the pipe. For this reason, the minimum length of the detected longitudinal defects is determined by the width of the ultrasonic transducer and the pitch of its helical path on the surface of the pipe. Transverse defects are usually not detected.
5 Standard samples
5.1 Standard patterns defined in this standard, are the standards, suitable for calibration of NDT equipment.
The sizes of artificial reflectors in these samples should not be considered as minimum dimensions of defects detected by this equipment.
5.2 If there are any other methods agreed in advance are investigated and analyzed, the ultrasonic equipment shall be calibrated using a longitudinal recess on the outer surface or calibration holes drilled radially through the entire thickness of the standard sample.
5.3 Standard sample should have the same nominal diameter, thickness, surface quality, and to be in the same thermal conditions as the pipe to be monitored, and to have similar acoustic properties.
5.4 recommended the recess or the hole needs to defend far enough from the ends of the standard sample to reliably record the signals from the artificial reflector.
5.5 recommended cut section is shown in figure 1, parallel to the axis of the tube. The sides should be parallel and the bottom shall be perpendicular to the sides.
Figure 1 — cross Section of the recess
Designations:
b — width; h — depth.
Figure 1 — cross Section of the recess
5.6 recommended seizure must be obtained by mechanical means with the help of arc erosion or other method.
Note — the bottom of the excavation, excluding flat or conical, may be chamfered.
6 Recommended sizes of notches and holes
6.1 Recommended dimensions of recesses
6.1.1 Width b (figure 1) is 1.5 mm maximum.
6.1.2 Depth h (figure 1) — 12.5% of specified thickness with the following restrictions:
— minimum depth — 0.5 mm,
— maximum depth 1,5 mm.
6.1.3 the Tolerance for depth is ±15% of the recommended digging depth or ±0,05 mm, no matter how great it was.
6.1.4 Length
The length of the recess must be selected by the manufacturer and satisfy the requirements as regards sizing.
6.1.5 Verification
The size and shape of the excavation should be checked with the proper equipment.
6.2 recommended hole Diameter
6.2.1 the diameter of the drill for making the recommended hole should be 3.2 mm with a tolerance in accordance with ISO 235 (short series) and ISO 286−1 (h8).
When the diameter of the pipe less than 168.3 mm in conformity with the requirement of 1.2 diameter of the drill should be agreed between customer and manufacturer, but shall not exceed 3.2 mm.
6.2.2 the hole Diameter should be controlled and should not exceed the specified drill diameter more than 0.2 mm.
7 Calibration and control of test equipment
7.1 the Equipment must be adjusted in accordance with consumer requirement for products and the signal must exactly match the signal from the standard sample. This signal should be used to identify the equipment rejection level.
7.2 During calibration, the relative speed between the standard sample and the ultrasonic transducer must be the same as for production control.
7.3 verification of the calibration should be carried out at regular intervals during the production testing of tubes of the same gauge using the selected standard sample. The frequency of calibration checking should be not less than 4 h. in addition, the calibrations need to be done always when there is a change of brigade operators serving equipment, and at the beginning and end of the production cycle.
Note — In cases where production control is carried out during an entire work shift, a 4-hour period may be extended by agreement between the consumer and the manufacturer.
7.4 the Equipment shall be re-calibrated after any adjustments to the system or in cases where there is a change in the mix of controlled pipes.
7.5 If after checking the calibration the calibration requirements are not satisfied even after increasing the sensitivity by 3 dB corrected for drift of the system, all pipes inspected since the previous calibration must be re-inspected after the re-calibration of equipment.
Repeated monitoring is not required even after dropping the sensitivity by more than 3 dB from the previous calibration with the appropriate recording, providing the grading of the pipes fit defective.
8 Acceptance
8.1 Any pipe, giving a signal from the defect at least rejection level, is considered the last control.
8.2 Any pipe, giving a signal from the defect, equal to or greater than the acceptance level, it is considered defective or at the request of the manufacturer can be controlled again.
8.3 If the re-monitoring the acceptance level is not exceeded, the tube is considered the last control. When exceeding the rejection level, the pipe is considered defective.
8.4 For defective pipes should be taken one or more of the following measures in accordance with the requirements of the standard for products:
— the surface layer of the questionable area is removed while maintaining the thickness of the wall of the pipe within a tolerance. After that, the pipe is checked at pre-agreed for this procedure.
If the signal is equal to or more rejection level, the pipe will be considered as last control.
A questionable site can be reevaluated in accordance with the requirements of ISO 9302 or by mutual agreement between the customer and the manufacturer using other technologies and methods of nondestructive testing with mutually agreed levels of signals from defects;
— each suspicious pipe can be inspected for continuity in accordance with the accounting standard as agreed between the customer and the manufacturer.
— questionable section of the pipe needs to be cut. The manufacturer must guarantee to the consumer that all questionable areas are removed.
Otherwise, the pipe fail inspection.
9 test report
After the inspection, the manufacturer shall submit consumer test report which as a minimum includes the following information:
— reference to this standard;
— the date of the inspection;
— official document about the quality of the pipe, held the control;
— the gauge tube and the batch number;
— the composition and type of equipment used;
— a description of the standard model.
| OKS 19.100 | В69 | AXTU 0009 | ||
| Key words: pipe steel, ultrasonic method, standard samples, calibration, test equipment | ||||
