Thermal Power Plant P91 Seamless Pipe for High Temperature Service

The pipe of P91 is mainly used in thermal power and petrochemical & refinery field. Mechanical properties and dimensions are uniform in longitudinal & transversal directions. Pipe has better surface and without any defects.

1. Reference Documents

• ASTM A999/A 999M Specification for General requirements for Alloy and Stainless Steel Pipe.
• ASTM E 213 Practice for Ultrasonic Examination of metal Pipe and Tubing
• ASTM E 309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation
• ASTM E 381 Method of Macroetch testing Steel Bars, Billets, Blooms, and Forgings
• ASTM E 570 Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products
• ASME B26.10M Welded and Seamless Wrought Steel Pipe

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 (P91),

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. Available Size Range

7. Tensile Requirements

Tensile Strength min.: 85ksi / 585MPa

Yield Strength min.: 64ks / 415MPa

8. Inspection & Test

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

9. Manufacture

Hot Rolled for 8'' and above or Cold Drawn for 6'' and below

10. Manufacturing Process

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

11. 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

We can also accept additional requirements beyond of standard, including:

The ratio of Nitrogen to Aluminum shall be a minimum of 4.

Minimum hardness based on material certificates shall be 210HV 9200HB) (93.4HRB).

Impact value must be 27J at 20°C.

Since 2006, NEW FORCE has been engaged in high end seamless steel pipe products such as thermal power pipes, nuclear power pipes, petrochemical & refinery pipes, mechanicl pipes, oil & gas pipes, and gas cylinder pipes. The company have complete QA system and various inspection methods. New Force has been growing to a leading large diameter seamless pipe supplier with production range 8 "-56" in OD and wall thickness from 9.53mm up to 140mm.

The production covers many industries such as Thermal power, Petrochemical & Refinery, Boiler, Mechanical, Oil & gas, Coal and shipbuilding. The company is the domestic unique technology private enterprise which has the most complete variety of seamless steel pipes.

We always believe that our success is directly related to our strict quality control and professional service.

NEW FORCE customers are widely distributed throughout the world, such as Southeast Asia, Middle East, North America, South America, Europe, Africa.

NEW FORCE - your trusted and long term partner for piping solutions, providing with innovative solutions, quality materials and timely delivery.