1.16MnDR按GB3531-96《低温压力容器用低合金钢钢板》正火状态供货。

According to the "1.16MnDR GB3531-96" low alloy steel plates for low temperature pressure vessels normalizing state of supply.

2.专用级螺柱材质35CrMoA采购时应在订货合同中注明：进行设计温度(-35℃)下的低温V形缺口冲击试验，其三个试样的冲击功Akv平均值应不低于27J。

2 special grade screw material 35CrMoA procurement should be specified in the order contract: the design temperature (-35 degrees C) under the low temperature V shaped notch impact test, the impact of the three specimens of the average value of the Akv should not be less than 27J.

3.低温锻件(16MnDII)按4727-2000《低温压力容器用低合金钢锻件》正火状态供货，锻件级别为II级。

3 low temperature forging (16MnDII) according to 4727-2000 "low alloy steel forgings for low temperature pressure vessels" normalized supply, forging grade II.

4.用于碳素钢和低合金钢焊接的焊条应按批进行药皮含水量或熔敷金属扩散[wiki]氢[/wiki]含量的复验，其检验方法按相应的焊条标准或技术要求。

4 for welding of carbon steels and low alloy steel electrode should be according to the batch of drug skin moisture or diffusion of deposited metal [wiki] hydrogen content of [/wiki] re inspection, the inspection method according to the corresponding standard or technical requirements of electrode.

5.碳钢和低合金钢制低温容器应每台带产品焊接试板，冲击试样取焊缝区和热影响区，各取三个。

5 carbon steel and low alloy steel low temperature vessel should be welded with each product test plate, the impact of the weld zone and heat affected zone, each take three.

6.焊接过程中，A、B、D类焊接接头采用双面焊或相当于双面焊的全焊透结构;焊接区域内，包括对接接头和角接接头的表面，不得有裂纹、气孔和咬边等缺陷，不应有急剧的形状变化，呈圆滑过渡;对接焊接接头的焊缝余高不得大于焊件厚度的10%，且不大于3mm，超过部分应磨平;接管端部应与换热器内表面齐平，端部内角应打磨成R≥3mm的圆角。

6 in the process of welding, A, B, D type welded joint using double-sided welding or equivalent double-sided welding full penetration welding structure; welding area, including butt joints and corner joints surface shall not have cracks, pores and defects such as biting edge, no sharp changes of the shape, the shape of smooth transition; butt welding the weld joint of high welding thickness shall not be greater than 10% and not more than 3mm, more than part should be smooth; over the end should be in the heat exchanger and flush end angle should be polished into R = 3mm fillet.

7.支座不得与壳体直接焊接，应设置垫板，垫板材料与壳体相同。

7 support may not be directly welded with the shell plate should be set, and the shell of the same material plate.

8.应将壳体表面的划痕、焊疤、弧坑等缺陷修磨成光滑曲面，修磨深度不得大于壳体名义厚度的5%，且不大于2mm。

8 should be scratches, welding scars, arc pit defects such as the surface of the smooth surface grinding, grinding depth not greater than 5% of the nominal thickness of the shell, and no more than 2mm.

9.其他要求可以看标准。

9 other requirements can look at the standard.

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