凝汽器组合安装焊接作业指导书

CSPC Nanhai Petrochemicals Project

SEPCO Electric Power Construction Corp.

《Safety health and environmental management work stipulation for electric power construction》 (Edition of 2002)

2．6 PR-8710-8100-0026 焊工培训与考核 Welder Training and Examination Rev.00 2．7 PR-8710-8100-0223 焊接消耗品控制 Consumable stores control for welding Rev.00 2．8 PR-8710-8100-0055 测量和校验设备Measuring and Test Equipment Rev.00 2．9 PR-8710-8100-0038 焊接控制Welding Control Rev.04 2.10 PR-8710-8100-0025 焊接程序WELDING PROGRAM Rev.00 2.11 PR-8710-8100-0213 NDE管理程序NDE Management 2.12《电站钢结构焊接通用技术条件》(DL/T678-1999)

《Common technique conditions for power station steel structural welding 》(DL/T678-1999) 3 职责 responsibility

3．1 焊工负责管道的焊接，并检查自己所焊焊缝的外观。

Welders are responsible for welding the pipe and inspecting the appearance of weld bead welded by self.

3．2 班组焊接质检（QC1）、工程处焊接质检(QC2)、公司级焊接质检(QC3)负责对焊工日常工作的监督，并按比例对焊缝进行外观检查和验收。

QC1, QC2 and QC3 are responsible for supervising the daily work of welder and inspecting and accepting the appearance of weld bead in proportion.

3．3 焊接工程师负责焊工考试、焊工档案管理、焊接程序、焊接资格认定测试、WPS 以及 PQR 资格认定记录的现场准备、发布并维持，并负责检查、指导焊工和焊接质检的工作。

Weld engineer is responsible for the welder examination, welder files management, weld procedure, cognizance test for procedure qualification, site preparation, issuance and maintenance for qualification cognizance record of WPS and PQR, as well as for inspecting and directing welders and the work of welding quality control.

3．4 NDE工程师负责无损检测程序准备、发布和维持以及NDE检测及填发NDE报告。 NDE engineer is responsible for the preparation, issuance and maintenance of NDE procedure and NDE detection and filling in and issuing the NDE report. 3．5基建总公司（以下简称SEPCO）焊接工程师负责施工协调和质量验收。

Weld engineer in Shangdong Electric Power Construction corporation (SEPCO for short)

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is responsible for the construction coordination and the quality acceptance.

4施工准备PREPARATION FOR CONSTRUCTION

4.1焊接工艺规程（WPS）和焊接工艺评定(PQR)满足现场焊接需要。 WPS and PQR meet the requirement of site welding.

4.2焊机、热处理机、焊条烘干箱等工器具准备齐全，并经过校验。

Tools and instrument such as welding machine, heat-treatment machine, welding rod baking oven are all ready and they have been verified.

4.3使用的各种焊接材料齐全，具有相应的合格证。

All kinds of used weld material are all ready, and have relative qualified

certificates.

4.4现场焊接搭设好防风、防雨设施，管道内也不得有穿膛风。

The windshield and rain-proof equipment for site welding has been set up, there is

no draft inside the pipe.

4.5焊件在组装前应将焊口及附近母材内、外壁的油、漆、垢、锈等清理干净，直至发出金属光泽。清理范围如下：每侧各为20mm。

Clean up the oil, paint, dirty, rust which are in the weld bead and inside & outside the

wall of base material thoroughly prior to assemble the weldment. The cleaning range is as follows: 20mm for each side.

4.6对接单面焊的局部错口值不应超过焊件厚度的10%，且不大于1mm。对接双面焊的局部错口值不应超过焊件厚度的10%，且不大于3mm。角焊缝错口值不应超过10%的板厚且不大于2mm。 The partial value of fissure of displacement of butt one side weld shouldn’t be over

10% of the thickness of weldment ，and no more than 1mm. The partial value of fissure of displacement of butt double side weld shouldn’t be over 10% of the thickness of weldment, and no more than 3mm. The fissure value of the corner weld should be over 10% of thickness of steel plate, and no more than 2mm.

4.7每个项目开工前，安装部门应提前足够的时间通知焊接队开工的日期、系统、项目、管线号、图纸号、材质、规格等，以便焊接队有充足的准备时间。

The erection department should inform the welding team in advance about the commencement

date, system, item, pipeline number, drawing number, material characteristic, specification and so on before the commencement of each project, so as to make the welding

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SEPCO Electric Power Construction Corp.

team have enough time to prepare it.

4.8开工前，班长派出焊工到技术组接受技术和安全交底。

The team leader send welder to the technique group to receive the real intentions of

technique and safety before commencement. 4.9点焊使用的焊条和焊接要求与正式焊接相同。

The weld rod used for spot welding and the weld requirement are the same as that of the formal welding. 5 资源配置resource allocation

5．1 主要施工机具如下The main construction machinery and tools are as follows： ZX7-400逆变焊机（contra-variant welder） 10台；

焊条烘干箱 Baking oven of welding rod 2台； 焊条保温筒 heat-insulated mould of welding rod 20个； 电焊钳 Electrode holders 20把； 钢丝刷 Steel wire brush 20把； 记号笔 Sign pen 12只； 手电筒 Flashlight 12只； 5．2 人员配置：Personnel allocation

焊接工程师和质检员 Welding engineer and QC inspector 2人； 安全员 Safetyman 1人； 焊工 Welder 10人。 6施工工序和施工方法WORKING PROCEDURE AND METHOD

6.1 热井与壳体的焊接 Jointing for the heat sink and the shell 6.1.1 材质：热井和壳体的材料均为低碳钢P265GH(EN10028)。

Material characteristic: The material for heat sink and shell are all the low

carbon steel P265GH(EN10028)。

6.1.2 适用的焊接工艺规程（WPS）:HZ-016（见附录一）； Applied WPS: HZ-016 (Refer to appendix 1) 6.1.3 焊接方法 Welding method ：SMAW；

6.1.4 焊接材料 Welding material ：E4315，Φ3.2mm、Φ4.0mm； 6.1.5 接头形式 Form of joint ：角焊缝 Corner weld ；

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SEPCO Electric Power Construction Corp.

6.1.6点焊 ：每段点焊长度应大于50mm，间隔300mm；

Spot welding: The length of spot welding for each section should be greater than 50mm, and it is at intervals of 300mm; 6.1.7 焊接 Welding ：

a. 采用4名焊工对称布置在壳体的四周，同时由左向右施焊，保持方向和速度基本一致。

Collocate it around the shell symmetrically by four welders, at the same time, weld it from the left to the right, keeping the direction and the speed consilient basically. b. 所有连接焊缝均采用多层多道焊，严禁单层单道焊。

Weld all connecting welding bead with the method of multilayer, strictly prohibit welding it with the method of single layer.

c. 每个连接点（如两条焊缝之间的接头，两个焊工之间的接头等）的每道或每层焊缝间的接头

要错开50-100mm。

The joint between weld bead of each layer for each junction( such as joint between two pieces of weld bead, joint between two welders and so on ) should be staggered by 50-100mm。

d. 焊工施焊时，采用小电流、分段跳焊、小摆动等焊接方法减小焊接变形；

Employing the method of low current, subsection skip welding, small swing and such methods when welding in order to reduce the welding distortion;

6.2膨胀节与壳体的焊接 Jointing for expansion joint and shell

6.2.1 材质：膨胀节的材质是低碳钢P265GH(EN10028)，厚度是20mm，壳体一侧的材质是低碳钢P265GH(EN10028)。接口部分为4m×1.3m的方形结构。

Material characteristic: the material characteristic of expansion joint is the low carbon steel P265GH(EN10028)，20mm thick, the material characteristic of one side of shell is the low carbon steel P265GH(EN10028)。The part of interface is the quadrate structure of 4m×1.3m.

6.2.2适用的焊接工艺规程（WPS）:HZ-016（见附录一）； Applied WPS: HZ-016 (Refer to the appendix 1); 6.2.3焊接方法 Welding method ：SMAW；

6.2.4焊接材料 Welding material ：E4315，Φ3.2mm、Φ4.0mm； 6.2.5接头形式 Form of joint ：角焊缝 Corner weld ；

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