products

TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping

Basic Information
Place of Origin: China
Brand Name: TORICH
Certification: ISO 9001,ISO 14001,TS 16949
Model Number: GB/18984
Minimum Order Quantity: 3 Ton
Price: negotiable
Packaging Details: In plywood case,In wooden box.
Delivery Time: 30 days
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 50000 tons/year
Detail Information
Keyword: Seamless Steel Tubes For Low-Temperature-Service Piping Type: Seamless Steel Tubes
Surface: Oiled Material: 16MnDG,10MnDG,09DG,09Mn2VDG,06Ni3MoDG
Shape: Round Length: 4-12M
OD: 5-450mm WT: 0.5-50mm
High Light:

seamless steel pipe

,

seamless carbon steel tube


Product Description

TORICH GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping
 
 
Application:For Low-Temperature-Service Piping
 
Material:16MnDG,10MnDG,09DG,09Mn2VDG,06Ni3MoDG
Unit:mm

Hot Roll(Extrusion,Expansion)Steel TubeCold Drawn(Roll) Steel Tube
DiamensionToleranceDiamensionTolerance
Ordinary Level PAHigh Level PCOrdinary Level PAHigh Level PC

Nominal Outer Diameter
D

<76.1±1.25%D±0.60

Nominal Outer Diameter
D

<12.7±0.30±0.10
76.1~<139.7±0.8012.7~<38.1±0.30±0.15
139.7~<273.1±1.5%D±1.2038.1~<88.9±0.40±0.30
88.9~<139.7±0.9%D±0.40
273.1~<323.9±1.60139.7~<203.2±0.80
203.2~<219.1±1.10
≥323.9±0.6%D219.1~<323.9±1.60
≥323.9±0.5%D

Nominal Wall Thinckness
S

All Wall Thickness

+15%S
-12.52%S

±12.5%S

Nominal Wall Thinckness
S

All Wall Thickness

+12.5%S
-10%S

±10%S

 
Permissible deviation tolerance of OD and WT

ClassficationSteel sizePermissible tolerance
W-HOD<351±1.0%D
≥351±1.25%D
WT≤25±12.5%S
W-COD≤30±0.20
>30~50±0.30
>50±0.75%D
WT≤3

+12.5%S
-10%S

>3±10%S
 

 
 
 
Steel grade and chemical composition

Steel gradeChemical composition/%
CSiMnPSNiMoV
16MnDG0.12~0.200.20~0.551.20~1.60≤0.025≤0.025
10MnDG≤0.130.17~0.37≤1.35≤0.025≤0.025≤0.07
09DG≤0.120.17~0.37≤0.95≤0.025≤0.025≤0.07
09Mn2VDG≤0.120.17~0.37≤1.85≤0.025≤0.025≤0.12
06Ni3MoDG≤0.080.17~0.37≤0.85≤0.025≤0.025≤0.05
 

 
Longitudinal mechanical properties of steel tubes

Steel grade

Tensile strength
TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping 0/
MPa

Lower yield strength Rp0.2/MPaElongation A/
S≤16mmS>16mmSample 1Sample 2Sample 3
16MnDG490~665≥325≥315≥30
10MnDG≥400≥240≥35
09DG≥385≥210≥30
09Mn2VDG≥450≥300≥30
06Ni3MoDG≥455≥250≥30

 
Testing items and sampling quantity of steel tubes

NumberTesting itemsSampling quantity
1Chemical composition1 sample from each furnace
2Tensile test1 sample from each of two steel tubes on each batch
3Hardness test1 sample from each of two steel tubes on each batch
4Ultrasonic testingALL
5Hydraulic testALL

 
 
TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping 1
TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping 2
 
 
TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping 3
 

Contact Details
Richard

Phone Number : +8613736164628

WhatsApp : +8613736164628