ASME B31.1a-2008

Methods E112, shall be No. 6 or coarser. 12.2 The grain size of Grades TP304H, TP316H, TP321H, TP347H and TP348H, as determined in accor- dance with Test Methods E 112, shall be No. 7 or coarser. 13.7 Grain Size - Grain size determinations on grades TP309H, TP309HCb, TP310H and TP310HCb shall be made on the same number of tubes as prescribed for the fiattening test. 13.8 Heavily cold worked tubes (HCW) shall be capa- ble of passing the weld decay test listed in Supplementary S7 with a weld metal to base metal loss ratio of 0.90 to 1.10. The test is not required unless S7 is specified in the purchase order.

14. Permissible Variations in Dimensions 14.1 Dimensional tolerances other than wall thickness tolerances shall be in accordance with Specification A 1016 / A 1016M. Wall thickness tolerances shall be ±10% of nominal wall for all tubing sizes.

14.2 The wall thickness of the weld shall not exceed the wall thickness measured 90° from the weld by more than 6% of the specified wall thickness or 0.004 in. [0.1 mm], whichever is greater.

14.2.1 Requirements of 14.2 are not applicable when any of the following apply: 14.2.1.1 When the speci fied wall thickness exceeds 12% of the specified outside diameter;

14.2.1.2 When the speci fied wall thickness exceeds 0.165 in. [4.2 mm];

14.2.1.3 When the specified OD exceeds 3 in. 13. Mechanical Tests and Grain Size [76.2 mm]; or Determinations Required 13.1 Tension Test - One tension test shall be made on a specimen for lots of not more than 50 tubes. Tension tests shall be made on specimens from two tubes for lots of more than 50 tubes (Note 2).

13.2 Flattening Test - One fiattening test shall be made on specimens from each end of one finished tube, not the one used for the fiange test, from each lot (Note 1). 13.3 Flange Test - One fiange test shall be made on specimens from each end of one finished tube, not the one used for the fiattening test, from each lot (Note 1). 13.4 Reverse-Bend Test - One reverse-bend test shall be made on a specimen from each 1500 ft [450 m] of finished tubing. 13.5 Hardness Test - Brinell or Rockwell hardness tests shall be