I'm trying to understand Table 3.2 Prequalified Austenitic Stainless Steels. These are on pages 26, 27, 28, and 29. Page 26 makes no mention of pipe, but its shown 27, 28, and 29. For ASTM A316L, for example, page 27 shows A312 pipe in one column and A409 pipe in another column. Page 29 shows A813 pipe in one column and A814 pipe in another column.
Tubes are kind of the same thing. For ASTM A304, one column shows A213 tube, and another column shows A249 tube. Page 28 shows A511 tube in one column and A554 in another column.
Can somebody please explain this? I'm more confused than a homeless man on house arrest.