机械结构用不锈钢焊接钢管-电动阀阀门资质证该如何办-辛丰怎么领取矿用流体输送焊接钢管

 
6.1.11 The internal cleanness of the piping is the essential aspect affecting the construction quality, the critical requisition for the successful commissioning and service at the first time. Clause 6.2.1 of this specification also specifies the internal cleanness of piping. Deepgoing lesson have been learned from the serous impact to commissioning and production quality due to uncleanness inside piping in the past years. Thus the inside of qualified prefabricated pipes shall be kept clean and the end openings shall be timely closed.
6.2　管道安装
Piping Installation
6.2.9~6.2.11　这三条是管道与机器连接时的要求。表6保留原规范SHJ 501－85表3.2.12的所有规定，GB 50235的规定见下表：
6.2.9~6.2.11 These three clauses are in regard to the requirements on the connection of piping to machines. In Table 6, all the specification of 3.2.12 of Table SHJ 501-85 in the original specification has been maintained and the following table lists the specification of GB 50235:
法兰平行度、同轴度允许偏差
Tolerance of flange parallelism depth and axiality
机器转速
Machine rotation speed
r/min
平行度
Parallelism depth
mm
同轴度
Axiality
mm
3000~6000
≤0.15
≤0.50
>6000
≤0.10
≤0.20
　　相互比较，本规范保留了转速<3000 r/min时的要求，因为转速小于3000 r/min的转动机器在石化行业里比较普遍。
Through the intercomparison, the requirement under the condition of rotation speed of <3000r/min has been maintained in this specification as the rotating machine with the rotation speed less than 300r/min is commonly used in petrochemical industry.
　　管子与机器的法兰连接处，单机试车前，应在联轴器上架表检查确认最终连接情况，若有不合格，应进行调整，合格后方能进行试车。
The final connection status shall be checked for the flange connection of pipe to machine before commissioning through installing instrument to the coupling. For any inconformity, rectification shall be performed till the conformity status is achieved prior to the commissioning.
7　管道焊接
Piping Welding
7.1　一般规定
General Specification
7.1.2　本条根据JB3223－83《焊条质量管理规程》第4.3条：“存放一年以上的焊条，在发放前应请质量检验部门，重新做各种性能试验，符合要求时方可发放，否则不应出库。”的规定而制定的。鉴于各施工单位都改善了焊条的保管条件，并能严格进行焊条的管理，所以本条规定仅做焊条焊接工艺性能试验。
7.1.2 This clause is set down according to Clause 4.3 of JB 3223-83 “Electrode Quality Management”: “For electrode that has been stored more than one year, each performance tests shall be performed again by quality inspection department before issuing for application. Only those conforming to the requirement can be issued from the store.” Considering all the construction units have improved their storage condition of electrode and the electrode management requirement has been strictly implemented, this specification only requires the electrode process performance test.
　　焊条焊接工艺性能试验时，首选应检查焊条焊芯不得有锈蚀现象，药皮不应有影响焊条质量的缺陷。然后进行焊条的焊接试验，试验过程电弧稳定、无异常现象、焊缝成型良好，焊后未产生气孔、裂纹等缺陷的焊条是可以使用的。
　　During electrode weld process performance test, inspection shall be performed for that there shall not be any rustiness on core welding-wire and any defect of the coating affecting the electrode quality. After that, the welding test with electrode can be performed and those electrodes with stable electric arc, no abnormality and good weld shape during the welding test and without any gas pore, crack or other defects after the welding are applicable.
7.1.3　根据GB/T 13304－91《钢分类》的规定，本条将原规范“碳素钢、合金钢、不锈钢”的划分改用“非合金钢、低合金钢、合金钢”表述。
7.1.3 In accordance with the specification of GB/J 13304-91 “Classification of Steel” This clause expresses the classification by “unalloyed steel, low alloyed steel and alloyed steel ” instead of “carbon steel, alloyed steel, stainless steel” in the original specification.
7.2　焊前准备与接头组对
Welding Preparation and Jo
int Alignment
7.2.6　本条规定了焊接接头坡口应进行渗透检测的两类管道。其中淬硬倾向较大的管道，主要指标准抗拉强度下限值   
 
 
 
 
 
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