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Marine Steel Pipes and Tubes for Pressure Piping

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Marine Steel Pipes and Tubes for Pressure Piping

Marine Steel Pipes and Tubes for Pressure Piping

Marine steel pipes and tubes for pressure piping refer to shipbuilding steel pipes which are designed for pressure systems of ships. Materials of the pipe conform to the requirements of GB/T 5312. There are five steel grades: 320, 360, 410, 460, 490. According to the different design temperature and design pressure, the pipe can be divided into three grades, , , . Specifications for the pipe comply with the standard GB/T 17395. If you have any specific requirements for the pipes, we will customize pipes for you. Excepting the above-mentioned pipes, we are able to provide other marine pipes, such as marine stainless steel pipes, marine alloy steel pipes, marine carbon steel pipes, marine hydraulic steel pipes, marine galvanized steel pipes, marine high precision steel pipes... Please contact us for more details!

Features of Marine Steel Pipes and Tubes for Pressure Piping

• Steel Grades: 320, 360, 410, 460, 490 or as per customers request

• Pipe Grades: , ,

• Specifications: according to the standard GB/T 17395 or as per customers request

• Manufacturing Methods: WHR(WHEX), WHE, WCD(WCR)

• Delivery Condition: normalized

• Relevant Tests: chemical composition inspection, tensile strength test, impact test, flattening test, bending test, flaring test, flange test, hydraulic test, eddy current test, MFL testing, ultrasonic test.

• Applications: marine pressure systems

Pipe Grades of Marine Steel Pipes and Tubes for Pressure Piping

Grade

Media

Design Pressure

MPa

Design Temperature

Design Pressure

MPa

Design Temperature

Design Pressure

MPa

Design Temperature

>

-

Steam and hot oil

1.6

300

0.7~1.6

170~300

0.7

170

Fuel oil

1.6

150

0.7~1.6

60~150

0.7

60

Other media

4.0

300

1.6~4.0

200~300

1.6

200

Note

1. When a pipes design temperature or design pressure meets requirements for gradeon table A , the pipe will be certified as gradepipe. When a pipes design temperature and design pressure both meets requirements for grade on table A , the pipe will be certified as grade pipe.

2. Other media refer to air, water, lubricating oil, hydraulic oil...

3. Grade pipes can be made according to national standards agreed by CCS.

Steel Grades and Chemical Composition

Steel Grade

Chemical Composition %

C

Si

Mn

S

P

Residual Elements

Cr

Mo

Ni

Cu

gross

320

0.16

-

0.40~0.70

0.020

0.025

0.25

0.10

0.30

0.30

0.70

360

0.17

0.35

0.40~0.80

410

0.21

0.35

0.40~1.20

460

0.22

0.35

0.80~1.20

490

0.23

0.35

0.80~1.50

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Our mail: manager@hiseamarine.com

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