ISO 09330-4:2000 pdf download
ISO 09330-4:2000 pdf download.welded steel tubes for pressurepurposes -Technical deliveryconditions – Part 4: Submerged arc-welded unalloyed andalloyed steel tubes with specified elevatedtemperature properties.
j) impact test, see 10.1.3;
k) specific marking, see 12.3;
I) protective coating, see 13;
m) type of inspection and testing and corresponding document, see 9.2 and 14.
4.3 Example of an order
Example of an order conforming to the dimensional standard ISO 4200, with an outside diameter of 457 mm, a wall thickness of 10 mm and a standard length (random length) of 4 m to 8 m, made of steel grade PH 23 with specified elevated temperature properties to be submitted to specific inspection and testing to test category I involving the issuing of an inspection document 3.1 B in accordance with ISO 10474:1991.
TubelSO4200-457×10-4to8-1S09330-4-PH23-l-3.1.B
5 Manufacturing process
5.1 Steelmaking process
If requested, the purchaser shall be informed of the steelmaking process used.
Steels may be cast in ingots or may be strand cast. When steels of different grades are sequentially strand cast identification of the resultant transition material is required. The producer shall remove the transition material by an established procedure that positively separates the grades.
5.2 Deoxidation process
Steels intended for the production of tubes covered by this part of ISO 9330 shall be fully-killed.
5.3 Product-making process for tubes
A welded tube is obtained by shaping a flat-rolled product and then welding the edges. The weld may be longitudinal or helical.
Tubes shall be submerged arc-welded (SAW) using at least one run on the inside and one run on the outside of the tube. Unless otherwise agreed, the process of manufacture is left to the discretion of the manufacturer, provided that the welding method and welder/welding operator have been approved in accordance with a qualified procedure.
Tubes covered by this part of ISO 9330 may be hot finished or cold finished. The terms “hot finished” and “cold finished” apply to the condition of the tube before it is heat treated, if applicable.
5.4 Delivery condition
5.4.1 Tubes covered by this part of ISO 9330 shall be delivered in accordance with Table 1 and when appropriate the heat treatment conditions indicated in Table 2.
5.4.2 By agreement between the purchaser and the manufacturer the tubes may be delivered in a condition other than the final delivery condition in which case they shall be suitable for subsequent manipulation and the purchaser shall be informed of any treatment necessary to obtain the specified properties.
7.1 Diameters, wall thicknesses and masses
The outside diameters, wall thicknesses and masses of the tubes covered by this part of ISO 9330 should be selected from those given in ISO 4200.
By agreement between the purchaser and the manufacturer tubing specified by inside diameter and wall thickness can be supplied. In such a case the dimensions and the tolerances required should be agreed upon at the time of enquiry and order.
7.2 Lengths
7.2.1 It shall be stated on the enquiry and order whether the tubes are to be delivered with random lengths, see 7.2.2, or with exact lengths, see 7.2.3.
7.2.2 If the tubes are to be delivered with random lengths, the length range shall be agreed upon at the time of inquiry and ordering.
7.2.3 If the tubes are to be delivered with exact lengths, the length tolerances given in 7.3.4 shall apply.
7.3 Tolerances
7.3.1 Tolerances on outside diameter and on wall thickness (excluding the weld)
The outside diameters and the wall thicknesses of the tubes covered by this part of ISO 9330 shall be within the tolerance limits given in Table 7, see 9.3.2.2.
Within areas where the tube surface has been dressed by mechanical machining (such as grinding), e.g. as a result of instructions required for the performance of non-destructive testing, it is permissible to exceed the minus deviation on the outside diameter by a small amount over a length of not more than 1 m, provided that wall thickness remains within the lower tolerance limits.
