Medium Pressure Boiler Seamless Alloy Steel Tube ASTM A335 P22 20'' SCH XXS

Since 2008, TIPTOP has been supplying ASTM A335/ ASME SA335 P22 seamless high & medium pressure boiler pipes, with OD up to 56'' 1422mm and wall thickness up to 140mm. TIPTOP is your trusted partner for large OD & heavy wall thickness seamless pipes.

1. Available Size Range

2. Standards:
ASTM A335 Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

3. Application:
For high pressure boiler and steam header pipes; petrochemical industry pipes; thermal power plant; nuclear power plant; USC boiler.

4. Ordering Information

Quantity (feet, meters, or number of lengths),

Name of material (seamless alloy steel pipe),

Grade (P22),

Manufacture (hot-finished or cold-drawn),

Size using one of the following:

NPS and schedule number;

Outside diameter and nominal wall thickness;

Outsider diameter and minimum wall thickness;

Inside diameter and nominal wall thickness;

Inside Diameter and minimum wall thickness.

Length (specific or random)

End finish (plain end or bevel end)

5. Chemical Requirements

6. Tensile Requirements

Tensile Strength min.: 60ksi / 415MPa

Yield Strength min.: 30ks / 205MPa

7. Inspection & Test

Chemical composition, mechanical properties ( tensile strength, yield strength, elongation, flaring, flattening, bending, hardness, impact test), surface and dimension, NDE, hydrostatic test.

8. Manufacture

Hot Rolled or Cold Drawn

9. Manufacturing Process

Raw Material Inspection → Cold Centering → Heating → Piercing & Rolling → SIzing → Heat Treatment → Testing → Finishing → NDE → Visual & Dimension Inspection → Marking → Storing & Shipping

10. Supplementary Requirements

S1. Product Analysis

S2. Transverse Tension Tests

S3. Flattening Test

S4. Metal Structure and Etching Tests

S5. Photomicrographs

S6. Photomicrographs for Individual Pieces