Seamless steel pipe for ship building usage

Seamless steel pipe for ship building usage
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.
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.

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Model N0.of major steel tubes
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%

Society
Standard or usage
Steel grade

GLR

Non alloly
GL-R 410
GB 18248
37Mn
EN 10297
34CrMo4
DNV
for pressure
ASTM A53/A53M/A53B
ABS
for pressure
Grade 3
BV
for pressure
410HB
LR
for pressure
410
KR
for pressure
RST138,RST142,RST238,RST242,RST249,RST338, RST342
NK
for pressure
grade 1 No3/ KSTPG 42
CCS
for pressure
360,410,460,490

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Sunny Steel provide a wide range of steel products as Steel pipes, Seamless tube and seamless pipes, Alloy pipes, Pipe fittings, Composite steel pipe used in the industry, construction etc.
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Pipe fitting

Pipe fitting
Pipe fitting is work that involves the installation or repair of pipes or tubes. Pipes and tubes are necessary for a wide range of reasons.

Flanges General

Flanges General
A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system.

Seamless steel pipe >>

Seamless steel pipe >>
Seamless steel pipe is alos called CDS pipes (Cold drawn seamless pipe).