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1.16MnDR按GB3531-96《低溫壓力容器用低合金鋼鋼板》正火狀態(tài)供貨。

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

2.專用級(jí)螺柱材質(zhì)35CrMoA采購(gòu)時(shí)應(yīng)在訂貨合同中注明：進(jìn)行設(shè)計(jì)溫度(-35℃)下的低溫V形缺口沖擊試驗(yàn)，其三個(gè)試樣的沖擊功Akv平均值應(yīng)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.低溫鍛件(16MnDII)按JB4727-2000《低溫壓力容器用低合金鋼鍛件》正火狀態(tài)供貨，鍛件級(jí)別為II級(jí)。

3 low temperature forging (16MnDII) according to JB4727-2000 "low alloy steel forgings for low temperature pressure vessels" normalized supply, forging grade II.

4.用于碳素鋼和低合金鋼焊接的焊條應(yīng)按批進(jìn)行藥皮含水量或熔敷金屬擴(kuò)散[wiki]氫[/wiki]含量的復(fù)驗(yàn)，其檢驗(yàn)方法按相應(yīng)的焊條標(biāo)準(zhǔn)或技術(shù)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.碳鋼和低合金鋼制低溫容器應(yīng)每臺(tái)帶產(chǎn)品焊接試板，沖擊試樣取焊縫區(qū)和熱影響區(qū)，各取三個(gè)。

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.焊接過(guò)程中，A、B、D類焊接接頭采用雙面焊或相當(dāng)于雙面焊的全焊透結(jié)構(gòu);焊接區(qū)域內(nèi)，包括對(duì)接接頭和角接接頭的表面，不得有裂紋、氣孔和咬邊等缺陷，不應(yīng)有急劇的形狀變化，呈圓滑過(guò)渡;對(duì)接焊接接頭的焊縫余高不得大于焊件厚度的10%，且不大于3mm，超過(guò)部分應(yīng)磨平;接管端部應(yīng)與換熱器內(nèi)表面齊平，端部?jī)?nèi)角應(yīng)打磨成R≥3mm的圓角。

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.支座不得與殼體直接焊接，應(yīng)設(shè)置墊板，墊板材料與殼體相同。

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

8.應(yīng)將殼體表面的劃痕、焊疤、弧坑等缺陷修磨成光滑曲面，修磨深度不得大于殼體名義厚度的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.其他要求可以看標(biāo)準(zhǔn)。

9 other requirements can look at the standard.

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