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