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Square Pipes

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Metal Square Pipe

PPLICATION OFASTM A335/ASME SA 335 P5, P9, P11, P22, P91 SEAMLESS PIPES, TUBES
  • 1. Industrial Boilers
  • 2. Power Plants
  • 3. Nuclear Plants
  • This specification covers seamless ferritic alloy-steel pipe for high-temperature service. The pipe shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Grade P2 and P12 steel pipes shall be made by coarse-grain melting practice. The steel material shall conform to chemical composition, tensile property, and hardness requirements. Each length of pipe shall be subjected to the hydrostatic test. Also, each pipe shall be examined by a non-destructive examination method in accordance to the required practices. The range of pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practices. The different mechanical test requirements for pipes, namely, transverse or longitudinal tension test, flattening test, and hardness or bend test are presented.

Trade Name 

Grade

UNS #

Pipe

Forged / Bored Pipe *

1 1/4 Chrome 

P11

K11597

A335 / SA335

A369 / SA369

2 1/4 Chrome 

P22

K21590

A335 / SA335

A369 / SA369

5 Chrome 

P5

K41545

A335 / SA335

A369 / SA369

9 Chrome 

P9

S50400

A335 / SA335

A369 / SA369

P91

P91

K91560

A335 / SA335

A369 / SA369

P92

P92

K92460

A335 / SA335

A369 / SA369

Grade

C

Mn

P

S

Si

Cr

Mo

P5

0.15max

0.30-0.60

0.025

0.025

0.50 max

4.00-6.00

0.45-0.65

P9

0.15 max

0.30-0.60

0.025

0.025

0.25-1.00

8.00-10.00

0.90-1.10

P11

0.05-0.15

0.30-0.60

0.025

0.025

0.50-1.00

1.00-1.50

0.44-0.65

P22

0.05-0.15

0.30-0.60

0.025

0.025

0.50 max

1.90-2.60

0.87-1.13

P91

0.08-0.12

0.30-0.60

0.02

0.01

0.20-0.50

8.00-9.50

0.85-1.05

 

V 0.18-0.25

N 0.03-0.07

Ni 0.40 max

Al 0.02 max

Cb 0.06-0.10

Ti 0.01 max

Zr 0.01 max

 

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