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1、大型油罐焊接程序 WELDING PROCEDURETable of Contents1. PURPOSE22. SCOPE23. REFERENCES24.WELDING PROCESS FLOWCHART25.REQUIREMENTS35.1 Preparation prior to welding35.1.1 Selection of welding method35.1.2 Management of welding consumable35.1.3 Welding procedure qualification45.1.4 welder qualification45.1.5 wel
2、ding equipments45.1.6 Clean-up prior to Welding45.2 Control of welding process55.2.1 Weather conditions for welding55.2.2 Tack welding55.2.3 Back gouging55.2.4 Attachments welding55.2.5 Welding order of tanks65.2.6 Welding of bottom plate65.2.7 Welding of tank shells75.2.8 Welding of roof of tank85.
3、2.9 Product test plates85.2.10 Marking of Welds 焊接标记85.3 Inspection of welding seam85.3.1 Visual inspection85.3.2 NDT95.4 Welding seam repairing106. WELDING DOCUMENTS AND RECORDERS11.ATTACHMENT121. PURPOSEThis project is to construct 2 butadiene tanks, (size:1660010000).The procedure provides some w
4、elding process and welding requirements, to ensure welding quality of butadiene tanks to meet requirements of contract and applied specification/standard to satisfy the owner.目的：本工程是建造两台储罐。本程序为确保油罐的焊接施工质量符合合同、适用规范和标准的要求，使业主满意，特制订焊接工艺和焊接要求。2. SCOPEThis procedure is applicable to the tank welding of 0
5、0 00 Petrochemical Project 2 butadiene tanks.范围：本施工程序适用于中海壳牌石油化工有限公司2台xx罐的焊接施工。3. REFERENCES3.1 “Vertical cylindrical steel welded oil tank” GBJ128-903.2 “welding evaluation for steel pressure vessel ” JB470820003.3 “mechanical property tests of product welded test coupons for steel pressure vessels
6、” JB474420003.4“Design and Construction of Large，Welded，LowPressure storage Tanks” API-6203.5 “Code of welding and Brazing Evaluate” SECTION IX ASME code3.6 PMC Relevant Welding Procedures 00-0025 00-00383.7“BUTADIENE STORAGE TANKS, 002&003” SP-8430-0810-0304 3.8 Design Drawing 3.1立式圆筒形钢制焊接油罐施工及验收规范
7、 GBJ128-903.2钢制压力容器焊接工艺评定 JB470820003.3钢制压力容器产品焊接试板的力学性能检验JB474420003.4大型焊接低压油罐设计和施工 API- 6203.5焊接和钎焊评定 ASME 第IX卷3.6 PMC相关焊接文件 00-0025 00-00383.700储罐 002&003 SP-8430-0810-0304 3.8设计图纸4.WELDING PROCESS FLOWCHARTReview drawing Establish WPS Process qualification Welder test Welding preparation Fitting
8、/tack welding Welding Visual inspection NDT (repair) Final acceptance.焊接工艺流程图审查图纸制定WPS工艺评定焊工考核焊接准备组对/点焊焊 接目测检查NDT（返修）最终验收5.REQUIREMENTS要求5.1 Preparation prior to welding 焊前准备5.1.1 Selection of welding methodAccording to relevant documents ( standards ，specifications, etc.), we shall adopt SMAW to we
9、ld 2 butadiene tanks, polarity is Reversed polarity, DC. 焊接方法选择根据相关的文件（标准、规范等），我们采用手工电弧焊焊接2台xx罐，极性是直流反接。5.1.2 Management of welding consumable焊材管理 According to design documents, material of tank plates is ASTM A516 Gr60, therefore, type of welding rod is AWS A5.5 E7016-G.根据设计文件，罐板材质是ASTM A516 Gr60，所
10、以焊条型号选用AWS A5.5 E7016-G.。 Certification and testing of welding consumables is to be checked prior to use. For AWS A5.5 E7016-G electrode, diffusible hydrogen content of weld metal deposit shall not exceed 5 ml/100 g weld metal.焊条使用前检查质量证明书和测试报告，对于AWS A5.5 E7016-G.焊条，熔敷金属扩散氢含量应不超过5 ml/100 g。 At-site,
11、 all welding consumables for permanent works are to be stored in a controlled lockable store. Welding consumables shall be stored with care under clean, dry conditions in their original unopened packing. 在现场 ，用于正式焊接的焊条应存贮在可封闭的库房里，保持干净、干燥，和原始包装。 Special person must be arranged to manage welding consu
12、mables ,including baking ,storage , issue , return ，he must do a record. And site welding engineer must monitor and review consumable strictly. Prior to use, all electrodes shall be newly unpackaged or re-dried according to the manufacturers instructions, baking temperature is between 350400 for low
13、-hydrogen electrode ; baking time is 1 hour ; constant temperature is 100150; and the baking frequency is not over 2 times.指定专人管理焊条，包括烘干、发放、回收，并作好记录。现场焊接工程师必须严格监控。焊条使用前应拆封按照制造商的说明书进行烘干，烘干温度是350400，时间1小时；保温温度100150；烘干次数不得超过2次。 The Welder shall keep the electrodes in the portable rod ovens . During we
14、lding, electrode shall be taken out one by one.焊工应将焊条放在便携式焊条筒内，焊接时一根一根取出焊条。5.1.3 Welding procedure qualificationIn order to weld butadiene tanks, according to “mechanical property tests of product welded test coupons for steel pressure vessels”(JB4708-2000), we shall qualify the following welding pr
15、ocedure items on site:AWS A516 Gr60 =8mm SMAW vertical double-face welding;AWS A516 Gr60 =15mm SMAW vertical double-face welding.The test plate shall be carried out tensile test, transverse tensile test, and Cv-impact test(-46).焊接工艺评定针对xx罐的焊接，我们将在现场按照JB4708钢制压力容器焊接工艺评定做以下焊接工艺评定：AWS A516 Gr60 =8mm 手工电弧焊 立焊 双面焊AWS A516 Gr60 =15mm 手工电弧焊 立焊 双面焊焊接工艺评定试板需进行拉伸试验、弯
