STEEL TUBE AND PIPE HANDBOOK - February 2012

10 Technical delivery conditions (TDC) of tubes (excludes inspection) All tubes requirements are concentrated in the TDC Standards. Specific data are included in standards for several groups of tubes General TDC for steel production are EN10021 (ISO404). Symbols and definitions of terms for use in product standards are in EN 10266. Important part is the tube testing. Tube inspection Tube testing proves that properties of tubes meet the require- ments of an order and appropriate standards. The process divide up into three parts: • setting out the test type (EN 10021, EN 10204, ISO 10474) • setting out the type of a document inspection (EN 10204) • selection of individual tests (particularly TDC) The individual parts are connected without possibility of any com- bination. Proper tests of particular tubes are speciefied in TDC. • Non-specific and specific inspection Non-specific inspection – contains only mandatory tests according to the particular standard – test specimens do not have to be from their own delivery – testing station does not have to be independent from the tubes treatment plant Specific inspection – except for mandatory tests it contains other free selected tests – tube specimens are from the delivery, and their number is set by standard – testing station must be independent from the pipe treatment plant • Tests – mandatory – as per individual TDC standards – optional – agreed upon while placing an order for the tubes chosen from standard •Quality – TR 1, TR 2 depends on: – chemical composition (Al contents) – mechanical properties value (bending impact test) – type of tubes testing (specific and non-specific testing) • Test category – TC1 and TC2 depends on: – establishing of a standard – chemical composition (carbon or alloyed steel) – possibility of choice in placing an order for pipes (in C steel) The categories differ from each other mainly by the require- ment for non-destructive testing of pipes, or selection of alter- native tests. • Types of inspection documents The summary of certificate types meets the requirements of EN 10204 in accordance with the type of inspection: Non-specific inspection 2.1 Certificate of compliance with the order (manufacturer) 2.2 Test Report (manufacturer) Specific testing 2.3 Specific Test Report (manufacturer) – manufacturer’s test certificate, test results based on specific testing. This is only issued if the manufacturer has no independent test- ing station. If the testing station is independent, in lieu of this certificate a Certificate 3.1.B has to be issued. 3.1.A Inspection Certificate 3.1.A (office inspector) 3.1.B Inspection Certificate 3.1.B (works inspector) 3.1.C Inspection Certificate 3.1.C (purchase inspector) 3.2 Inspection Report 3.2 (works and purchase inspector) EN10204: 2004 Issue customizes following test certificates: 2.1 Declaration of compliance with the order 2.2 Test report 2.3 Not considered 3.1 Inspection certificate 3.1 (former 3.1.B) 3.2 Inspection certificate 3.2 (former 3.1.A, 3.1.C, 3.2) In EN is the table – Relation between class qualification ac- cording to Regulation 97/23 EU, supplement I., section 4.3 and type of certificate. The tests are divide into groups: • value of steel chemical composition - cast - product • dimensional inspection • mechanical properties* - tensile test - (hardness) - impact test • technological tests* - flattening - drift expanding - flanging - bending - ring tensile test • leak tightness test - hydrostatic test - non-destructive testing • non-destructive testing - longitudinal defects (eddy currents, leakage fluxes, - transverse defects ultrasonic) - laminar defects • other tests (metallography, corrosion resistance, etc.) * see page 104 Table below lists the overview of the leak tightness test and non-destructive testing: Method STN, ČSN DIN (SEP) EN ISO ASTM Dimensions ISO Tightness test Hydrostatic pressure 42 0415.8 Normy TDP D < 140 mm NDT 01 5047 SEP 1925 10893 - 1 viď NDT 9302 01 5049 01 5054 Non-destructive tests (NDT) Eddy currents 01 5054 (PRP 02-74) 10893 - 2 E 309 D > 4 mm, T > 0,5 mm 9304 Leakage fluxes 01 5047 SEP 1913 10893 - 3 E 570 D > 32 mm, T > 2 mm** 9402 Ultrasonic – L longitudinal imperf. 01 5028 - 2 SEP 1915 10893 - 10 E 213 D > 13 mm, T > 1(2) mm** 9303 Ultrasonic – Q transverse imperf. 01 5028 - 3 SEP 1918 10 893 - 10 9305 Ultrasonic – D laminar imperf. 01 5028 - 4 SEP 1919 10893 - 8 Tube lengths - see List of standards given for each of tube groups 1)** Values for Podbrezová 2) SEP 1917 - Eddy currents testing for electric-resistance welded tubing