石油与天然气化工
石油與天然氣化工
석유여천연기화공
CHEMICAL ENGINEERING OF OIL AND GAS
2015年
2期
113-117
,共5页
刘伟%李朋%张哲%马娜%戴兴星%张玉婷
劉偉%李朋%張哲%馬娜%戴興星%張玉婷
류위%리붕%장철%마나%대흥성%장옥정
放空管道%放空温度%低温%低应力%背压%选材
放空管道%放空溫度%低溫%低應力%揹壓%選材
방공관도%방공온도%저온%저응력%배압%선재
vent pipeline%vent temperature%low temperature%low stress%back pressure%material selection
对高压天然气放空管道的选材进行了研究。天然气管道放空时温度较低,超出了普通碳钢的使用温度下限,需按“低温低应力工况”考虑。通过对某天然气放空管道的操作温度、操作压力及应力进行核算,分析其是否处于“低温低应力工况”。结果表明,放空管道操作压力低于1.0 MPa,正常操作时的轴向拉应力低于材料标准规定的20#钢最小抗拉强度值的10%,管道操作工况处于“低温低应力工况”,管道材质可以使用20#钢。
對高壓天然氣放空管道的選材進行瞭研究。天然氣管道放空時溫度較低,超齣瞭普通碳鋼的使用溫度下限,需按“低溫低應力工況”攷慮。通過對某天然氣放空管道的操作溫度、操作壓力及應力進行覈算,分析其是否處于“低溫低應力工況”。結果錶明,放空管道操作壓力低于1.0 MPa,正常操作時的軸嚮拉應力低于材料標準規定的20#鋼最小抗拉彊度值的10%,管道操作工況處于“低溫低應力工況”,管道材質可以使用20#鋼。
대고압천연기방공관도적선재진행료연구。천연기관도방공시온도교저,초출료보통탄강적사용온도하한,수안“저온저응력공황”고필。통과대모천연기방공관도적조작온도、조작압력급응력진행핵산,분석기시부처우“저온저응력공황”。결과표명,방공관도조작압력저우1.0 MPa,정상조작시적축향랍응력저우재료표준규정적20#강최소항랍강도치적10%,관도조작공황처우“저온저응력공황”,관도재질가이사용20#강。
The material selection of high-pressure natural gas vent pipeline was studied.The oper-ating temperature of natural gas vent pipe is low,which exceeds the avowable lower limit temperature of ordinary carbon steel.In this case,low temperature and stress conditions should be considered.By calculating the operation temperature,operation pressure and stress of a natural gas vent pipe,wheth-er it is in the condition of low temperature and low stress is analyzed.The results show that when the vent pipe operating pressure is below 1.0 MPa for normal operation,the axial tensile stress is below 10% of the minimum tensile strength value of steel 20 # .Pipeline operation condition is “low tempera-ture and stress condition”.Therefore,20 # steel can be used as natural gas vent pipe.
