X80天然气管线钢管技术规范

Range of application: Grades≤ X80; operation pressure up to 12.0 MPa; 40 < D /t <115; single-phase or rich gases that decompressed into the two-phase boundary;
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STRAIN AGEING
AGED HYDROTESTED AS WELD
ROUND BAR
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TOUGHNESS
• Basic elements: – Fracture initiation (including potential resistance to and the effect of mechanical damage) – Assurance of fully-ductile behaviour – Control of ductile fracture propagation
内容
¾ 基本要求 ¾ X80管线的标准 ¾ 总结
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基本要求
CHEMICAL化学
最大合金元素含量 PS Ceq(Pcm)
性能
强度 韧性 焊接性
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基本要求
强度
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X80 输气管线的标准 强度
强度要求和拉伸试样 Bauschinger 效应
成型—扩管—检验 试样
板卷开平 圆试样 环扩张 应变时效
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材料的应变历史
成型
0,015
0,05
0,05
0,04
0,45
1,30
0,025
0,015
0,05
0,05
0,04
0,45
1,30
0,025
0,015
0,05
0,05
0,04
0,45
1,40
0,025
0,015
d
d
d
0,45
1,40
0,025
0,015
d
d
d
0,45f
1,60f
0,025
0,015
g
g
g
0,45f
1,60f
检验
UOE
U-ing
O-ing
EXPENSION
FLATTEN STRIP FLATTEN TEST
ROUND BAR
INSIDE
C
C
T
OUTSIDE
T
C
T
JCOE
INSIDE
C
T
OUTSIDE
T
T
HELICAL INSIDE
C
OUTSIDE
T
T
T
T
C
T
T
T
T
T
C
T
T
T
T
T
C
T
T
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Cb 0,22 0,22 0,22 0,22 0,22 0,12f 0,12f 0,12f 0,12f 0,10 0,10 0,10
Mass fraction, based upon heat and product analyses %
Maximum
Si
Mnb
P
S
V
Nb
Ti
0,45
1,20
0,025
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FRACTURE IN GAS PIPELINES
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ISO3183: 2007 NEW EDITION
----ARREST TOUGHNESS
¾ EPRG Guideline ¾ BSC ¾ BTC ¾ AISI ¾ Full scale test
CHANGE IN YIELD STRENGTH
FORMING
EXPPANSION SPECIMENFALTTENING
UOE JCOE HSAW
O-ing BENDING BENDING
EXP EXP
/
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SPECIMEN
Transverse tensile testing
屈服强度 钢管的屈服 钢板或板卷的屈服
BAUSCHINGER 效应 材料 成型工艺-- LSAW（UOE JCOE) HSAW 试样类型
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基本要求
韧性 断裂控制 基本元素: 全塑性行为保证
– 转变温度--- DWTT
• 裂纹起源 基体 焊接HAZ CVN
HFI
SWP
UOE
HRS
- UOE manufactured pipe - HFI welded pipe - SWP spiral weld pipe - Hot rolled seamless pipe
400
500
600
700
800
900
Rt0.5 on transverse round bar specimen, MPa
• .Two considerations – Prevention of fracture initiation • Critical flaw size – Prevention of fracture propagation (Ductile) • Long fracture • Historically based on Charpy shelf energy
0,025
0,015
g
g
g
0,45f
1,70f
0,025
0,015
g
g
g
0,45f
1,85f
0,025
0,015
g
g
g
0,55f
2,10f
0,020
0,010
g
g
g
0,55f
2,10f
0,020
0,010
g
g
g
0,55f
2,10f
0,020
0,010
g
g
g
Other
e e e e e h h h i i i i
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EPRG guidelines
Operation pressure up to 8.0 MPa, D<1430mm, t<25.4mm, single-phase
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Influencing factors
Flattened strip: remaining curvature, D/t ratio, measuring device
Round bar:
diameter and location
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If predicted CVN value exceeds 100J, corrections are necessary.
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AISI method
Range of application: Grades≤ X70; D ≤ 1219mm; t ≤ 18.3mm; single-phase
Flattened strip:
full wall testing – plastic deformation
Round bar: part of the wall – no plastic deformation
Specimen preparation in standards Different preferences in standards (flattened / round) Different process for flattening
• 控制塑性裂纹扩展 基体 上平台 CVN
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X80 输气管线的标准
• 主要的管线标准都已覆盖
ISO CSA GB EN
• 附加的企业标准通常要求
– 成分 – 强度 – 韧性
• 如果基于应变设计所需要的附加要求
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X80 输气管线的标准
Chemical Composition for PSL 2 Welded Pipe －ISO3183
Pipe designation
L245M or BM L290M or X42M L320M or X46M L360M or X52M L390M or X56M L415M or X60M L450M or X65M L485M or X70M L555M or X80M L625M or X90M L690M or X100M L830M or X120M
Typically, a range of pipe toughness is installed in the burst test section, with the pipe toughness increasing on each side of the test section as the distance from the fracture origin increases. The CVN absorbed energy needed for arrest is established based upon the actual CVN absorbed energy of the pipe in which arrest is observed to occur. The pipeline-specific gas composition, temperature and pressure level are used for the burst test. Thus, it is the most general approach and is applicable for pipeline designs that are outside the existing database of test results.
Battelle simplified equation (BSC)
Grades≤ X80; operation pressure up to 7.0 Mpa; 40 < D /t<115; single-phase
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Battelle Two Curve ( BTC )
If predicted CVN value exceeds 100J, corrections are necesary.
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Full-scale burst tests
Full-scale burst test is the most reliable method to validate the arrest toughness for a specific pipeline design.
Carbon equivalenta %
Maximum
CE
Pcm
0,43
0,25
0,43
0,25
0,43
0,25
0,43
0,25
0,43
0,25
0,43
0,25
0,43
0,25
0,43
0,25
0,43
0,25
―
0,25
0,25
0,25
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Rt0.5 on transverse flattened rectangular specimen, MPa
900
800
Rt0.5 - transverse
x=y
flattened strip - round bar
700
600
500
400
300 300
EPRG28VP3R
X100
GRS 550, X80 X70 X60 X52
X80 输气管线的标准
国内X80天 然气管线对 化学成分的 考虑
HTP钢
对Nb元素 的限制放 宽
C Mnc)
P S Si Nba) Va) Tia) Al N Cu Cr Mo Ni B CE Pcm,
0.09 1.85 0.022 0.005 0.42 0.110 0.06 0.025 0.06 0.008 0.30 0.45 0.35 0.50 0.0005 0.23
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X80天然气管线钢管技术规范 Specification for X80 gas linepipe
Huo Chunyong
Tubular Goods Research Center of CNPC
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RING EXPENSION ROUND BAR FLATTENED STRIP