Zhejiang Matech Industry Company Limited

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Hangzhou Matech Steel Company Limited
Tel: +86-571-28350111
Fax: +86-571-86693517
Email: sales@matech-steel.com
Add: Floor 10, Xixi Vally E-Building, Xihu District, Hangzhou, Zhejiang province, China
Ship Building Tubes

Ship Building Tubes

Seamless steel pipe for ship building usage The Seamless steel pipe for ship building usage are mainly used for Level 1& Level 2 pressure pipe in piping system, boiler and super-heated unit of shipbuilding. Seamless steel tubes for ship-building refer to the ship building steel pipes which...

Seamless steel pipe for ship building usage

The Seamless steel pipe for ship building usage are mainly used for Level 1& Level 2 pressure pipe in piping system, boiler and super-heated unit of shipbuilding.

Seamless steel tubes 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.

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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 tubes for manufacturing marine boilers and ovemeaters as we as pressure pipes opf grade I and Ⅱ.

Model N0.of major steel tubes

320,360,410,460,490,etc.

<table width="100%" border="0" cellspacing="0" cellpadding="0" class="table"

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:

<table width="100%" border="0" cellspacing="0" cellpadding="0" class="table"

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:

<table width="100%" border="0" cellspacing="0" cellpadding="0" class="table"

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


Seamless steel tube and pipe for ship building usage

<table width="100%" border="0" cellspacing="0" cellpadding="0" class="table"

Society

Standard or usage

Steel grade

  chemical composition, %












C

Si

Mn

P

S

Cr

Ni

Cu

Al

Mo

V

P+S





GLR

Non alloly

GL-R 410


0.21


0.35


1.40


0.025


0.020

-

-

-

≥0.020

-

-

-

GB 18248

37Mn

0.34
~0.40

0.10
~0.30

1.35
~1.65


0.030


0.030


0.30


0.30


0.20

-

-

-


0.055


EN 10297

34CrMo4

0.30
~0.37


0.40

0.60
~0.90


0.035


0.035

0.9
~1.20

-

-

-

0.15
~0.30

-

-


DNV

for pressure ASTM A53/A53M

A53B


0.30

-


1.20


0.050


0.045


0.40


0.40


0.40

-


0.15


0.08

-


ABS

for pressure

Grade 3


0.30

-


1.20


0.050


0.045


0.40


0.40


0.40

-


0.15


0.08

-

BV

for pressure

410HB


0.21


0.35

0.40
~1.20


0.040


0.040

-

-

-

-

-

-

-

LR

for pressure

410


0.21


0.35

0.40
~1.20


0.045


0.045


0.25


0.30


0.30

-


0.10

-

-


KR

for pressure

RST138


0.25


0.35

0.30
~0.90


0.040


0.040

-

-

-

-

-

-

-

RST142


0.30

0.30
~1.00


0.040


0.040

-

-

-

-

-

-

-




RST238


0.25

0.10
~0.35

0.30
~1.10


0.035


0.035

-

-

-

-

-

-

-



RST242


0.30

0.30
~1.40

-

-

-

-

-

-

-






RST249


0.33

0.30
~1.50

-

-

-

-

-

-

-






RST338


0.25

0.30
~0.90

-

-

-

-

-

-

-






RST342


0.30

0.30
~1.00

-

-

-

-

-

-

-






NK

for pressure

grade 1 No3/ KSTPG 42


0.30


0.35

0.30
~1.00


0.040


0.040

-

-

-

-

-

-

-

CCS

for pressure

360


0.17


0.35

0.40
~0.80


0.040


0.040


0.25


0.30


0.30



0.10



410


0.21


0.35

0.40
~1.20


0.040


0.040


0.25


0.30


0.30



0.10





460


0.22


0.35

0.80
~1.40


0.040


0.040


0.25


0.30


0.30



0.10





490


0.23


0.35

0.80
~1.50


0.040


0.040


0.25


0.30


0.30



0.10





 Note:

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

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    Tel: +86-571-28350111
    Fax: +86-571-86693517
    Email: sales@matech-steel.com
    Add: Floor 10, Xixi Vally E-Building, Xihu District, Hangzhou, Zhejiang province, China
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