Un important fabricant de tubes en acier sans soudure pour chaudières en Chine, propose des tubes d'échangeur de chaleur en acier de haute qualité, un tube de chaudière en carbone sans soudure, un tube de chaudière en acier allié
Les tubes en acier de chaudière sans couture sont produits par le traitement sans couture étiré à froid,
avec la catégorie en acier d'acier à faible teneur en carbone, d'acier à carbone moyen, d'acier allié etc.
Normes techniques
ASTM A179, ASTM A192, ASTM A210, ASTM A213, ASTM A334, ASTM A335 etc.
DIN17175, EN10216-2, GB / T 5310, BS3059, etc.
Catégorie en acier:
Catégorie d'acier au carbone:
ST35.8, ST37.0, ST44, ST52;
E155, E195, E215, E235, E275, E355;
195GH, P235GH, P265GH, P195TR1, P195TR2, P235TR1, P235TR2, P265TR1, P265TR2;
SAE1010, SAE1020, SAE1026, SAE1035, SAE1045;
Tube en acier au carbone: SA178, A179, A192, A210, SA213, SA214, etc.
Alliage d'acier Grade:
T2, T5, T9, Tll, T12, T17, T21, T22, T91, T92, 15Mo3, 16Mo3, 13CrMo44;
SAE4130, SAE4140, 40Cr, 40Cr4, 10CrMo910, 12CrMo910, 11CrMo910,
25CrMo4, 35CrMo, 35CrMo4, 42CrMo4, 34CrMo4, 20MnV, 20MnV6,20CrMn, 12Cr1MoVG;
Nom du produit : TORICH GB / T20409 20G 20MnG 25MnG SA210 SA213 Tubes en acier sans soudure à chaudière à haute pression multi-rayé
Norme : GB / T20409
OD: 3-420mm
WT: 0.5-50mm
Longueur : 8-12m ou selon l'application et la production réelles des clients.
Application : Chaudière à haute pression
Catégorie en acier : 20G 20MnG 25MnG SA210 SA213
Technologie : Laminé à chaud, laminé à froid, étiré à froid
Caractéristiques:
Bonne concentricité
Bonne qualité de surface
Bonne tolérance OD et ID
Haute précision
Qualité stable
Rugosité lisse
ASSURANCE QUALITÉ TORICH
Tableau6 Propriétés mécaniques longitudinales des tubes à vis internes à température ambiante
|
Number
|
Grade
|
tensile strength
RM
MPa(N/mm2 )
|
Lower yield strength
ReL /MPa((N/mm2)
|
Elongation
A/%
|
Impact energy
AKV /J
|
|
Not less than
|
|
1
|
20G
|
410~550
|
245
|
24
|
35
|
|
2
|
20MnG
|
≥415
|
240
|
22
|
35
|
|
3
|
25MnG
|
≥485
|
275
|
20
|
35
|
|
4
|
12CrMoG
|
410~560
|
205
|
21
|
35
|
|
5
|
15CrMoG
|
440~640
|
235
|
21
|
35
|
Tableau4 Le grade et la composition chimique de l'acier
|
Number
|
Brand
|
chemical
composition(mass fraction)/ %
|
|
C
|
Mn
|
Si
|
Cr
|
Mo
|
S
|
P
|
|
1
|
20G
|
0.17~0.23
|
0.35~0.65
|
0.17~0.37
|
--
|
--
|
≤0.020
|
≤0.025
|
|
2
|
20MnG
|
0.17~0.23
|
0.70~1.00
|
0.17~0.37
|
--
|
--
|
≤0.020
|
≤0.025
|
|
3
|
25MnG
|
0.22~0.29
|
0.7~1.00
|
0.17~0.37
|
--
|
--
|
≤0.020
|
≤0.025
|
|
4
|
12CrMoG
|
0.08~0.15
|
0.40~0.70
|
0.17~0.37
|
0.40~0.70
|
0.40~0.55
|
≤0.020
|
≤0.025
|
|
5
|
15CrMoG
|
0.12~0.18
|
0.40~0.70
|
0.17~0.37
|
0.80~1.10
|
0.40~0.55
|
≤0.020
|
≤0.025
|
|
Note1:Residual element
content of 20G.20MnG.25MnG
should satisfy: Cu≤0.20%.Cr≤0.25%.Ni≤0.25%.V≤0.08%.Mo≤0.15%;The remaining elements of other
brands should satisfy: Cu≤0.20%.Ni≤0.30%.
Note2:The acid soluble
aluminum in 20G steel should not be more than 0.010%.
Note3:The nitrogen content
of the steel produced by the oxygen converter plus the refining of the
furnace should not be more than 0.008%.
|
La taille des tubes de vis internes et la déviation admissible des paramètres de filetage
|
Code
|
Project
|
[A" teeth types
allowable deviation
|
[B" teeth types
allowable deviation
|
|
A
|
O.D≤38.1mm
38.1mm＜O.D＜50.8mm
50.8mm≤O.D≤63.5mm
O.D≥63.5mm
|
±0.15mm
±0.20mm
±0.25mm
±0.30mm
|
--
|
|
B
|
O.D≤38.1mm
38.1mm＜O.D＜50.8mm
50.8mm≤O.D≤63.5mm
O.D≥63.5mm
|
--
|
±0.15mm
±0.20mm
±0.25mm
±0.30mm
|
|
C
|
I.D of the root of the screw
Thread:
O.D-(1.11×Minimum W.T×2)
O.D≤38.1mm
38.1mm＜O.D＜50.8mm
50.8mm≤O.D≤63.5mm
O.D≥63.5mm
|
±0.15mm
±0.20mm
±0.25mm
±0.30mm
|
±0.15mm
±0.20mm
±0.25mm
±0.30mm
|
|
E
|
Minimum I.D
|
Negative deviation to
zero
|
Negative deviation to
zero
|
|
F
|
Minimum W.T
|
+22%
0
|
+22%
0
|
|
G
|
Thread tips
|
--
|
--
|
|
I
|
Thread top width
|
--
|
--
|
|
Ja
|
Height of thread:
O.D≤38.1mm
38.1mm＜O.D＜50.8mm
50.8mm≤O.D≤63.5mm
O.D≥63.5mm
|
±0.3mm
|
±0.18mm
±0.20mm
±0.23mm
±0.28mm
|
|
K
|
Side Angle of thread.
|
±15°
|
±15°
|
|
O
|
radius of rounded corner
at the root of thread
|
--
|
--
|
|
M
|
Thread pitch
|
±3.2mm
|
±3.2mm
|
|
N
|
Thread lead
|
±3.2mm×thread tips
|
±3.2mm×thread tips
|
|
Qb
|
Helix angle
|
Rating
|
Rating
|
|
T
|
Thread top width (axial)
|
±1.3mm
|
±1.3mm
|
|
U
|
Thread top (axial)
groove width
|
--
|
--
|
|
a. For the B type, the maximum deviation of any thread height can
exceed the allowable deviation specified in the table, but it should not
exceed the allowable deviation of 0.08mm, and the average height of all
threads should be in line with the given deviation range.
b. The rating is based on the axis of the pipe.
|
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