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The Seamless steel pipe for ship building usage

DataTime:[2016-9-26]
The Seamless steel pipe for ship building usage is mainly used for Level 1 & Level 2 pressure pipe in piping system, boiler and super-heated unit of shipbuilding.
Seamless steel pipes for ship-building refer to the ship building steel pipes which are designed and manufactured for boilers,super heaters and pressure systems of ship. The ship building steel pipes can be expansively used in various kinds of ships such as CCS,DNV,LR,GL,ABS,BV,RINA,NK as well as China national standards.
Classification of ships:
Standard for malerials and wielding from Chinese classifying society Chinese clasifying society (CCS)
Standard of DNV Det Norske Veritas (DNV)
Standard of Lloyd’S Register of UK (LR) Lloyd’S Register of UK (LR)
Standard of Germanischer Lloyd Germanischer Lloyd (GL)
Standard of American Bureau of Shipping (ABS) American Bureau of Shipping (ABS)
Standard of BUREAU VERITAS (BV) BUREAU VERITAS (BV)
Standard of RINA Italian classification society (RINA)
Standard of NIPPON KAIJI KYOKAI(NK)NIPPON KAIJI KYOKAI(NK)
GB/T5312 Chinese national standard
Appication:
Seamless steel pipes for manufacturing marine boilers and ovemeaters as we as pressure pipes opf grade I and Ⅱ.
Model N0.of major steel tube
320,360,410,460,490,etc.

Types of steel tubes

Outer diameters

wall thickness

Cold-rolled tubes

Rube size(mm)

tolerances
(mm)
Tube sizes
(mm)
Tolerances
(mm)

>30~50

±0.3

≤30

±10%

>50~219

±0.8%

Hot-rolled tubes

>219

±1.0%

>20

±10%

Mechanocal properties:

Standard code

Models of steel tubes

Tensile strength(MPa)

Yield strength(MPa)

Elongation(%)

GB/T5312

320

320~410

≥195

≥25

360

360~480

≥215

≥24

410

410~530

≥235

≥22

460

460~580

≥265

≥21

490

490~610

≥285

≥21

Chemical compisition:

Standard code

Models of steel tubes

Chemical compisition(%)

C

Si

Mn

P

S

GB/T5312

320

≤0.16

≤0.35

0.40~0.70

≤0.035

≤0.035

360

≤0.17

≤0.35

0.40~0.80

≤0.035

≤0.035

410

≤0.21

≤0.35

0.40~1.20

≤0.035

≤0.035

460

≤0.22

≤0.35

0.80~1.40

≤0.035

≤0.030

490

≤0.23

≤0.35

0.80~1.50

≤0.035

≤0.030

Note:
residual elements: Cr≤0.25%, Mo≤0.10%, Ni≤0.30%, Cu≤0.30% aggregate≤0.70%

Tel No:+86-18267732328 / Email:[email protected]
Address:Longwan District, Wenzhou, Zhejiang Province, China.

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Yaang Pipe Industry Co., Ltd. is an international supplier of piping solutions for flange, butt welding fittings, socket welding fittings and threaded fittings. Our products are widely used in different industrial fields, including oil and gas, chemical industry, petrochemical industry, power plant, pulp and paper industry, environmental and water conservancy engineering, engineering projects, etc.