Executive standard: ASTMA335/A335M high-temperature use of iron tree body alloy steel seamless steel pipe specification

The products should meet the requirements of TSG D7002 pressure piping components type test rules.

Product Specifications：Outside diameter 21.3~760mm, thick wall: 2.0~130mm

Production method: hot rolling, cold drawing, hot expansion, delivery status: heat treatment.

ASTMA335P11 seamless steel pipe chemical composition: carbon: 0.05 ~ 0.15, manganese 0.30 ~ 0.60, phosphorus: ≤ 0.025, sulfur ≤ 0.025, silicon 0.5 ~ 1.0, chromium 1.0 ~ 1.5, molybdenum: 0.44 ~ 0.62

Tensile strength ≥ 415Map, yield strength ≥ 205Mpa, elongation after break ≥ 30%, and the surface quality: the finished steel pipe shall have the following characteristics

Surface quality: finished steel pipe should have a reasonable straightness; depth ≥ 12.5% S of all defects should be repaired and ground, patch welding or excision, and its repair shall not be a large area: depth of ≤ 1.6mm and can guarantee the minimum wall thickness of the mechanical scars, abrasions and craters are allowed to exist, otherwise it should be repaired and ground or excised: depth ≤ 5% S of the scars, cracks, folding, tearing or strips are allowed to exist, otherwise it should be repaired and ground; all Minimum wall thickness shall be guaranteed at the regrind, but the OD may be reduced by the amount of regrind.

Hydrostatic test

Hydrostatic test shall be carried out on a root-by-root basis. If the demand side specifies, the non-destructive can be used instead of hydraulic pressure, or can be delivered without hydraulic pressure and non-destructive, or can be tested without damage and then hydraulic test.

Notes for ordering

The order form should include the following 11 items:

1、Quantity(feet, meters or roots)

2、Material name (seamless alloy steel nominal pipe)

3、Grade ASTMA335P11,

4, manufacturing method (hot finishing or cold drawn)

5、Use one of the specifications shown below

5.1, NPS and tube wall thickness serial number.

5.2, outside diameter and nominal wall thickness.

5.3, outside diameter and minimum wall thickness.

5.4, ID and nominal wall thickness.

5.5, Inner diameter and minimum wall thickness

5.6, Length (in fixed and variable sizes)

5.7, end processing.

5.8, Selection requirements (water pressure and allowable weight deviation).

5.9, Required test report (see A530).

5.10, Standard number.

11 Special requirements or any optional supplementary requirements.