GOST 3242-79

GOST R ISO 15353-2014 GOST P 55080-2012 GOST R ISO 16962-2012 GOST R ISO 10153-2011 GOST R ISO 10280-2010 GOST R ISO 4940-2010 GOST R ISO 4943-2010 GOST R ISO 14284-2009 GOST R ISO 9686-2009 GOST R ISO 13899-2-2009 GOST 18895-97 GOST 12361-2002 GOST 12359-99 GOST 12358-2002 GOST 12351-2003 GOST 12345-2001 GOST 12344-88 GOST 12350-78 GOST 12354-81 GOST 12346-78 GOST 12353-78 GOST 12348-78 GOST 12363-79 GOST 12360-82 GOST 17051-82 GOST 12349-83 GOST 12357-84 GOST 12365-84 GOST 12364-84 STATE STANDARD P 51576-2000 GOST 29117-91 GOST 12347-77 GOST 12355-78 GOST 12362-79 GOST 12352-81 GOST P 50424-92 STATE STANDARD P 51056-97 GOST P 51927-2002 GOST P 51928-2002 GOST 12356-81 GOST R ISO 13898-1-2006 GOST R ISO 13898-3-2007 GOST R ISO 13898-4-2007 GOST R ISO 13898-2-2006 STATE STANDARD P 52521-2006 GOST P 52519-2006 GOST R 52520-2006 GOST P 52518-2006 GOST 1429.14-2004 GOST 24903-81 GOST 22662-77 GOST 6012-2011 GOST 25283-93 GOST 18318-94 GOST 29006-91 GOST 16412.4-91 GOST 16412.7-91 GOST 25280-90 GOST 2171-90 GOST 23401-90 GOST 30642-99 GOST 25698-98 GOST 30550-98 GOST 18898-89 GOST 26849-86 GOST 26876-86 GOST 26239.5-84 GOST 26239.7-84 GOST 26239.3-84 GOST 25599.4-83 GOST 12226-80 GOST 23402-78 GOST 1429.9-77 GOST 1429.3-77 GOST 1429.5-77 GOST 19014.3-73 GOST 19014.1-73 GOST 17235-71 GOST 16412.5-91 GOST 29012-91 GOST 26528-98 GOST 18897-98 GOST 26529-85 GOST 26614-85 GOST 26239.2-84 GOST 26239.0-84 GOST 26239.8-84 GOST 25947-83 GOST 25599.3-83 GOST 22864-83 GOST 25599.1-83 GOST 25849-83 GOST 25281-82 GOST 22397-77 GOST 1429.11-77 GOST 1429.1-77 GOST 1429.13-77 GOST 1429.7-77 GOST 1429.0-77 GOST 20018-74 GOST 18317-94 STATE STANDARD P 52950-2008 GOST P 52951-2008 GOST 32597-2013 GOST P 56307-2014 GOST 33731-2016 GOST 3845-2017 STATE STANDARD P ISO 17640-2016 GOST 33368-2015 GOST 10692-2015 GOST P 55934-2013 GOST P 55435-2013 STATE STANDARD P 54907-2012 GOST 3845-75 GOST 11706-78 GOST 12501-67 GOST 8695-75 GOST 17410-78 GOST 19040-81 GOST 27450-87 GOST 28800-90 GOST 3728-78 GOST 30432-96 GOST 8694-75 GOST R ISO 10543-99 GOST R ISO 10124-99 GOST R ISO 10332-99 GOST 10692-80 GOST R ISO 17637-2014 GOST P 56143-2014 GOST R ISO 16918-1-2013 GOST R ISO 14250-2013 GOST P 55724-2013 GOST R ISO 22826-2012 GOST P 55143-2012 GOST P 55142-2012 GOST R ISO 17642-2-2012 GOST R ISO 17641-2-2012 GOST P 54566-2011 GOST 26877-2008 GOST R ISO 17641-1-2011 GOST R ISO 9016-2011 GOST R ISO 17642-1-2011 STATE STANDARD P 54790-2011 GOST P 54569-2011 GOST P 54570-2011 STATE STANDARD P 54153-2010 GOST R ISO 5178-2010 GOST R ISO 15792-2-2010 GOST R ISO 15792-3-2010 GOST P 53845-2010 GOST R ISO 4967-2009 GOST 6032-89 GOST 6032-2003 GOST 7566-94 GOST 27809-95 GOST 22974.9-96 GOST 22974.8-96 GOST 22974.7-96 GOST 22974.6-96 GOST 22974.5-96 GOST 22974.4-96 GOST 22974.3-96 GOST 22974.2-96 GOST 22974.1-96 GOST 22974.13-96 GOST 22974.12-96 GOST 22974.11-96 GOST 22974.10-96 GOST 22974.0-96 GOST 21639.9-93 GOST 21639.8-93 GOST 21639.7-93 GOST 21639.6-93 GOST 21639.5-93 GOST 21639.4-93 GOST 21639.3-93 GOST 21639.2-93 GOST 21639.0-93 GOST 12502-67 GOST 11878-66 GOST 1763-68 GOST 13585-68 GOST 16971-71 GOST 21639.10-76 GOST 2604.1-77 GOST 11930.7-79 GOST 23870-79 GOST 11930.12-79 GOST 24167-80 GOST 25536-82 GOST 22536.2-87 GOST 22536.11-87 GOST 22536.6-88 GOST 22536.10-88 GOST 17745-90 GOST 26877-91 GOST 8233-56 GOST 1778-70 GOST 10243-75 GOST 20487-75 GOST 12503-75 GOST 21548-76 GOST 21639.11-76 GOST 2604.8-77 GOST 23055-78 GOST 23046-78 GOST 11930.11-79 GOST 11930.1-79 GOST 11930.10-79 GOST 24715-81 GOST 5639-82 GOST 25225-82 GOST 2604.11-85 GOST 2604.4-87 GOST 22536.5-87 GOST 22536.7-88 GOST 6130-71 GOST 23240-78 GOST 3242-79 GOST 11930.3-79 GOST 11930.5-79 GOST 11930.9-79 GOST 11930.2-79 GOST 11930.0-79 GOST 23904-79 GOST 11930.6-79 GOST 7565-81 GOST 7122-81 GOST 2604.3-83 GOST 2604.5-84 GOST 26389-84 GOST 2604.7-84 GOST 28830-90 GOST 21639.1-90 GOST 5640-68 GOST 5657-69 GOST 20485-75 GOST 21549-76 GOST 21547-76 GOST 2604.6-77 GOST 22838-77 GOST 2604.10-77 GOST 11930.4-79 GOST 11930.8-79 GOST 2604.9-83 GOST 26388-84 GOST 14782-86 GOST 2604.2-86 GOST 21639.12-87 GOST 22536.8-87 GOST 22536.0-87 GOST 22536.3-88 GOST 22536.12-88 GOST 22536.9-88 GOST 22536.14-88 GOST 22536.4-88 GOST 22974.14-90 GOST 23338-91 GOST 2604.13-82 GOST 2604.14-82 GOST 22536.1-88 GOST 28277-89 GOST 16773-2003 GOST 7512-82 GOST 6996-66 GOST 12635-67 GOST 12637-67 GOST 12636-67 GOST 24648-90

gost-3242-79.pdf (343.50 KiB)
ГОСТ 3242-79

GOST 3242−79 welded Connections. Quality control methods

GOST 3242−79

Group B09

INTERSTATE STANDARD

WELDED CONNECTIONS

Quality control methods

Welded joints. Quality control methods

Date of introduction 01.01.81

Resolution of the USSR State Committee on standards of 2 August 1979. N 2930 validity period is set with 01.01.81

The expiration time limit is removed by the resolution of Gosstandart of Russia from 21.10.92 N 1434

REPLACE GOST 3242−69

REPRINTING. May 2002

1. This standard specifies the quality control methods and their application in the detection of defects in welded joints of metals and alloys made by the methods of welding, is given in GOST 19521−74.

The standard is consistent with the recommendations of the CMEA standardization 5246−73 PC*, PC 4099−73, PC 789−67 and international standard ISO 2437−72.
________________
* Access to international and foreign documents referred to here and hereinafter, can be obtained by clicking on the link. — Note the manufacturer’s database.

2. Application of a method or set of methods of monitoring for detection of defects in welded joints during technical control of constructions at all stages of their manufacture, repair and modernization depends on the requirements imposed on welded joints in the technical documentation for construction.

Methods of control shall be as given in the table and indicated in the technical (design and technological) documentation on the structure.

3. The admissibility of the application is not installed in this standard, methods must be provided in the technical documentation for construction. Technology weld inspection by any method should be established in the normative-technical documentation on the control.

Non-destructive methods of quality control of welded joints


Control	Control method	The description of the method				Scope	Standard of method of control
		Identifiable defects	Sensitivity		Features of the method
Technical inspection	External inspection and measurement	Surface defects	It identifies the discontinuities and deviations of the size and shape of the welded joint from specified values by more than 0.1 mm, and also surface oxidation of the welded connection		The method allows to detect the defects of the minimal detectable size for the inspection and measurement of weld using optical devices with magnification up to 10and measuring instruments	Not limited to	-
Capillary	Color Fluorescent Fluorescent — colored	Defects (discontinuities) coming to the surface	Conventional levels of sensitivity according to GOST 18442−80		The sensitivity and accuracy of the method depend on the quality of surface preparation of joints to control	Not limited to	GOST 18442−80
Radiation	Radiographic Radioscopic Radiometric	Internal and surface defects (defect) and defects in the form of compounds	From 0.5 to 5.0% of the controlled thickness of the metal From 3 to 8% of the controlled thickness of the metal From 0.3 to 10% of the controlled thickness of the metal		The detectability of defects according to GOST 7512−82. The sensitivity depends on the characteristics of the controlled welded connections and controls	According to GOST 20426−82	GOST 7512−82
Acoustic	Ultrasonic	Internal and surface defects (defect)	The thickness of the welded soedineniya, mm	Extreme sensitivity, mm	The size, number and nature of defects are defined in conventional indicators according to GOST 14782−86	GOST 14782−86	GOST 14782−86
			From 1.5 to 10 incl.	0,5−2,5
			SV. 10 to 50 «	2,0−7,0
			«50» 150 «	3,5−15,0
			«150» 400 «	10,0−80,0
			«400» 2000 «	35,0−200,0
Magnetic	Magnetic fluxgate	Surface and subsurface discontinuities	Conventional levels of sensitivity according to GOST 21104−80*		Method provides detection of: internal discontinuities located at a depth of 10 mm from the surface of the compound; mixed defects. The sensitivity and accuracy of the method depends on the quality of preparation of connection to the control	According to GOST 21104−75	GOST 21104−75
	_______________ * Probably, the error of the original. Should read: GOST 1770−74. — Note the manufacturer’s database.
	Magnetic powder	Surface and subsurface discontinuities	Conventional levels of sensitivity according to GOST 21105−87		Method provides detection of internal discontinuities located between the surface connections at depths up to 2 mm inclusive. The sensitivity and accuracy of the method depend on the quality of preparation of connection to the control	According to GOST 21105−87	GOST 21105−87
	Magnetic graphic	Surface, subsurface and internal discontinuities	From 2 to 7% of the thickness of the test metal		The accuracy of the control is reduced in the presence of irregularities on the controlled surface connections larger than 1 mm. the Sensitivity decreases with increasing depth of defect	Butt-welded joints, performed arc and gas welding, structures made of ferromagnetic materials. Controlled thickness not exceeding 25 mm	-
Leak testing	Radiation	Through defects	The krypton 85 from 1·10to 1·10mmMPa/s		The radiation hazard	Detection of leaks in welded joints operating under pressure, confined designs of nuclear power, and closed structures, when it is impossible to use other methods of leakage detection. Controlled thickness is not limited to	-
	Mass spectrometric	Through defects	By the way: accumulation under atmospheric pressure to 1·10mmMPa/s vacuum from 1·10to 1·10mmMPa/s probe up to 1·10mmMPa/s		The operating conditions of leak detectors: the ambient temperature is 10−35 °C, highest relative humidity 80%	A method for accumulating pressure — determination of total extent of leakage of confined structures. Vacuuming method — determination of total extent of leakage from the closed and open structures. Method of probe — definition of local leaks in welded joints of large-size structures Controlled thickness is not limited to	-
	Gauge	Through defects	By the way: pressure drop from 1·10to 7·10mmMPa/s differential pressure gauge up to 1·10mmMPa/s		The sensitivity of the method decreases when the control structures of large volume. The duration of the test time, the temperature control gas and the environment, as well as the amount of atmospheric pressure affect the accuracy of the tests	Weld closed structures, working under pressure: method pressure drop — to determine the magnitude of the total leakage; a method of differential pressure gauge for locating leaks. Controlled thickness is not limited to	-
	Halide	Through defects	For freon 12: the atmospheric probe — up to 5·10mmMPa/s probe vacuum up to 1·10mmMPa/s		The accuracy and sensitivity of the control is reduced if the controlled surface has irregularities (nodules, indentations) preventing the approach of the probe to the controlled surface	Detection locations and values of the local leakages in the welded joints of closed structures, working under pressure. Controlled thickness is not limited to	-
	Gas analysis	Through defects	For freon 12 (90%) in mixtures with air from 2·10to 4·10mmMPa/s		The accuracy of the control is reduced in the presence of an ambient atmosphere of various gases and vapours including solvents for surface preparation of controlled compounds, tobacco smoke and gases produced by welding	Detection of local leaks in the welded joints of closed structures, working under pressure. Controlled thickness is not limited to	-
	Chemical	Through defects	Ammonia — to 6.65·10mmMPa/s The ammonia is from 1·10to 1 mmMPa/s		Requires compliance with fire safety rules and rules of work with hazardous chemical substances	Detection of local leaks in the welded joints of public and private structures working under pressure or intended to store liquids. Controlled thickness is not limited to	-
	Acoustic	Through defects	Not less than 1·10mmMPa/s		The control produced in the absence of noise. You can remote control	Detection of leaks in welded joints of underground water and high pressure pipelines. Controlled thickness is not limited to	-
	Capillary	Through defects	Luminous — from 1·10to 5·10mmMPa/s Luminous-color — from 1·10to 5·10mmMPa/s Luminescent — hydraulic — from 1·10to 5·10mmMPa/s Wetting with kerosene up to 7·10mmMPa/s		Requires careful cleaning of the controlled surface. The sensitivity of the method decreases when control of large thickness and the control of welded joints in all spatial positions other than the bottom. Under the control by wetting with kerosene — high fire risk	Detection of leaks in welded connections of open and closed structures: fluorescent and luminescent- color — weld designs, the working medium of which is gas or liquid; fluorescent — the water and by wetting with kerosene — weld designs, the working medium which is liquid. Controlled thickness is not limited to	-
	Bulk water under pressure	Through defects	From 3·10to 2·10mmMPa/s		At the control of welded joints of large capacity must be provided for rigidity	Detection of local leaks in welded joints in closed structures, working under pressure. Controlled thickness, is not limited to	Normative — technical documentation approved in the established order
	Bulk water without pressure	Through defects	Not more than 1·10mmMPa/s		At the control of welded joints of large capacity must be provided for rigidity	Detection of local leaks in the welded joints of open constructions. Controlled thickness is not limited to	Normative — technical documentation approved in the established order
	Pouring a stream of water under pressure	Through defects	Not more than 1·10mmMPa/s		The sensitivity of the method increases when fluorescent-indica — thorn inspect the coating surface. Control make up the hardware installation	Detection of local leaks in the welded joints of open constructions. Controlled thickness is not limited to	Normative — technical documentation approved in the established order
	Pouring sprayed water	Through defects	Not more than 1·10mmMPa/s		The sensitivity of the method increases with luminescent indicator coating to inspect the surface. Control make up the hardware installation	Detection of local leaks in the welded joints of open constructions. Controlled thickness is not limited to	Normative — technical documentation approved in the established order
	Bubble	Through defects	Pneumatic: air blow — 7·10to 1·10mmMPa/s a blowout with compressed air from 1 x 10mmMPa/s Pneumohydraulic: aquarium — 1·10mmMPa/s barakvanunu from 5·10to 1·10mm MPa/s Vacuum (using a vacuum) to 1·10mmMPa/s		The control is done with compressed air. The foam-forming composition of the coatings depends on the air temperature during tests of the pneumatic and vacuum controls	Detection of local leaks. Pneumatic method: air blow — weld closed structures, which working medium is gas or liquid; a blowout with compressed air — welded joints of large outdoor structures. Pneumohydraulic aquarium and barakvanunu ways: weld small, closed structures, working under pressure. Vacuum method — when a unilateral approach to controlled connections. Controlled thickness is not limited to	Normative — technical documentation approved in the established order
	The autopsy	Internal defects	Identify macroscopic defects		The opening is made by cutting, drilling, gas or air-arc gouging, grinding and cutting area of a welded joint with subsequent layer-by-layer fabrication into thin sections. After the control requires welding the exposed area of the welded connection	Welds that are not heat treated or is not available for radiation and acoustic control. Controlled thickness is not limited to	-
	Technology preview	Internal and surface defects	Identify macroscopic and microscopic defects		The test sample is performed in the same process and the same welder (welders), and controlled weld	Not limited to	-