99/709740 DC : DRAFT JUN 99
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
PREN 10253-2 - BUTT WELDING PIPE FITTINGS - PART 2: WROUGHT CARBON AND FERRITIC ALLOY STEELS WITH SPECIFIC INSPECTION REQUIREMENTS
30-11-2007
23-11-2012
Foreword
1 Scope
2 Normative references
3 Terms and definitions
3.1 Definitions
3.2 Symbols
4 Information to be supplied by the purchaser
4.1 Mandatory information
4.1.1 Designation of fittings
4.1.2 The enquiry and order shall include
following information:
4.2 Optional information
4.3 Examples of order
5 Resistance to internal pressure
5.1 General
5.2 Calculation method for elbows and return bends
5.3 Experimental method
6 Manufacturing process
6.1 Steel making process
6.2 Product making process for fittings and heat
treatment
6.2.1 Product-making process
6.2.2 Welding as part of the manufacturing
process of the fitting
6.2.3 Delivery condition
7 Metallurgical characteristics
7.1 Chemical composition
7.2 Mechanical properties
8 Dimensions and tolerances
8.1 Dimensions
8.1.1 Elbows
8.1.2 Tees
8.1.3 Reducers
8.1.4 Caps
8.1.5 Preferred diameters and wall thicknesses
8.2 Dimensional tolerances
8.2.1 Diameter (ID-ID[1])
8.2.2 Wall thickness tolerances at the welding
ends
8.2.3 Tolerances on specific dimensions
8.2.4 Tolerances on the form of fittings
8.2.5 Corrugation
8.3 End finishing
9 Appearance and soundness
10 Inspection and testing
10.1 General
10.1.1 Type of inspection and inspection documents
10.1.2 Content of the inspection document
10.1.3 Test unit
10.1.4 Number and type of tests
10.1.5 Preparation of samples and test pieces
10.2 Inspection and test methods
10.2.1 Chemical analysis
10.2.2 Tensile test at room temperature
10.2.3 Hardness test
10.2.4 Impact test
10.2.5 Bend test
10.2.6 Material Identification
10.2.7 Dimensional Inspection
10.2.8 Visual Inspection
10.2.9 N.D.T. of the weld made during the
manufacture of fittings
10.2.10 NDT of cold formed tees
10.3 Optional Tests
10.3.1 Product Analysis
10.3.2 Yield strength at elevated temperature
10.3.3 Impact test of the heat affected zone
10.3.4 NDT of the fitting
11 Marking
11.1 Marking to be applied
11.2 Methods
12 Protection and packaging
12.1 Protection
12.2 Packaging
Annex A Pipe and fitting wall thickness
Annex B Experimental method for determination of the
resistance to internal pressure burst test
B.1 Test objective
B.2 Test assembly
B.2.1 Representative components
B.2.2 Other components
B.3 Test procedure
B.4 Applicability of test results
B.4.1 Dimensions
B.4.2 Material grades
Annex C Recommended heat treatment temperatures
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