钢管内壁防腐施工技术方案.docx

钢管内壁防腐施工技术方案
Anti—corrosion technique plan of the pipe’ s inner wall
1 .施工工艺。onstruction technology
喷砂除一^►检验—底漆—检马L面漆—检验—喷涂标志一►出厂
Blast cleaning — inspection — primer — inspection — finishingcoat一inspection一spraying mark一delivery
2。喷砂除锈 blast cleaning
2。1管道内表面高压喷砂除锈达到AWWAC210-97规定要求，表面粗糙度达到40—70^；
The pipe's inner face should reach the AWWAC210 — 97requirements after high pressure blast cleaning, and theroughness of surface should reach 40—70um。
2。2除锈后涂装前的管道表面应用高压空气吹除干净，保证管道表面无锈、无尘或其它表面附着物，确保漆膜和钢管表面的附着力.
After basting cleaning, the surface of pipes should be cleanedwith high pressure air before coating to ensure the surface norust, dust and others so as to keep the adhesion of paint filmand the surface of pipes.
2.3除锈后合格的管道，在4小时内尽快涂装，以防止二次生锈.
The qualified pipes after blast cleaning should be coatedwithin 4 hours as soon as possible to prevent the second rust.
3。钢管内壁喷涂 i nner wall spray coating of pipes
3.1当空气中的相对湿度大于85%、钢管表面温度低与在大气露点以上3°C时，或高与60° C时禁止施工作业。室外作业，当风速大于3m/S,禁止施工。
Operation should be forbidden when the relative humidity in airis more than 85% and the surface temperature is less than 3 °Cabove dew point or higher than 60°C.The field operation shouldbe forbidden when the wind velocity is more than 3m/s.
3.2内壁防腐选用的是双组分环氧玻璃磷片防腐蚀涂料，配制比例熟化时间应严格按照涂料使用说明书中的规定。
The material adopted for inner wall anticorrosion is twocomponents epoxy anticorrosion paint, and the confectproportion should conform to the stipulation in the paintinstruction strictly.
3。3按照设计要求，采用自动高压无气喷涂施工，确保涂装质量，喷涂时，喷嘴轴线与管体角度保持80°— 90°,枪距离管体表面约5-6mm，喷枪移动速度应均匀,保证涂层平整，光滑、均匀、饱满。焊缝两侧150mm范围内，在喷涂时不涂底漆。
According to the design requirement, automatic high pressureairless spraying should be adopted so as to ensure the coatingquality. While painting, the nozzle-axis should be keep 80°-90° with tube。 The distance between muzzle and tube shouldbe 5—6mm; the spraying pistol moving velocity should beuniform to keep the coating smooth, neat , uniform , satiation.Primer should not be coated when spraying within 150mm at thesides of welding seam。
4。成品管养护 production tube curing
完成涂装的成品管，在养期内避免暴晒和雨淋，养护时间一般环境温度在10°C以下时养护6-10天，20°C-30°C时养护5-7天,30°C以上时养护3—5天.
The production tube that has painted should preventinsolation and drench during the maintenance period whichshould be 6—10 days under 10°C,5-7 days under 20°C—30°C,3—5 days when the temperature is higher than 30°C。
5。喷涂合格标志、编号、出厂。Qualified mark, No., and delivery
6。由于运输安装或其它原因造成的涂层损坏应及时修补。Thecoating damage because of transportation, installation andothers should be repaired timely。
7 .质量检验 quality inspection
防腐类型：钢管内壁采用环氧树脂涂料执行规范:AWWAC210-97
Anticorrosion type: epoxy coating adopted for the inner wallconnector type: AWWAC210—97
序号No.
阶段phase
检查内容
Inspection contents
频率frequency
验收与拒收标准
Acceptance and refusal standard
1
环氧树脂涂料接收检查
Epoxycoatingacceptancechecking
A。检查文件资料document
逐批检查each lot
每批都必须带有产品质量合格证Every lot product should have thecertification of fitness
B。包装检查packing
逐批检查each lot
材料必须正确包装，防止损坏The material must be packedcorrectly to prevent damage.
C。批次控制
Lot control
逐批检查each lot
每一批材料必须有单独的编号，以便在整个处理过程中容易识别与跟踪查找every lot material must haveindependent number for easyidentifying and tracing 。
D.原材料存放
Raw material storage
所有原材料
All material
所有原材料应封闭包装并存放在干燥的地方 all material should besealed package and stored in dryplace。
2
钢管内部清洁度Thecleanlinessof innerpipe
A.清洁程度cleanliness
1%钢管
1%pipe
钢管表面不得有油、油脂、灰、土、锈、油漆、鳞片及其它杂物，最终清洁度必须呈金属本色(SSPCSP6)There is no oil, grease , dust,rust, paint and others on thepipe,s surface。 The finalcleanliness should be metal color。
(SSPCSP6 )
B.调校表面轮廓对比仪the surface profilecontrastive machine
每天一次
Once everyday
读数必须与仪器上的零位相吻合
The readings must be accord withzero position of the machineo
C.测量表面轮廓
Measure the surfaceprofile
1%钢管
1% pipe
测量至少必须是1。5密耳
The measurement must be 1.5 thou atleast.
D。开车前审核
Audit before driving
只要以前的
各项工作都
取得满意的
结果
If only all
works got
以下是应该进行测量并需记录的参数：钢管的前进速度
钢管的旋转速度〔V旋转〕
The following parameters should bemeasured and recorded： theproceeding velocity of pipes, the

satisfiedresulto
rotary speed of pipes ( V type)
内壁标记和检查
Inner wallmark andchecking
A.钢管编号
Pipe number
所有验收的钢管1%都做
All acceptedpipe
需要做防腐涂层的钢管都必须有表明已经获准进行防腐处理的标记。钢管编号必须标注在钢管内部。
The pipes needed anticorrosioncoating must have the mark thatallowed doing anticorrosion。 Thepipe number must be marked in thepipe。
B.开始清理之前钢管
表面检查所有批次
The surface1% 都做
inspection beforeAll lot
cleaning
钢管所使用的每一批防腐原材料都应在监控之中，以便能够跟踪查找钢管所使用的每一批涂料
Every lot anticorrosion rawmaterial pipe used must bemonitored so as to tracing andchecking every paint used。
C.钢管表面检查
Surface inspection
1%钢管
1% pipes
按照标准中的第2A和2B的要求执行就应该能达到满意的防腐效果According to the requirements of2A, 2B in the standard to check canreach the satisfied anticorrosioneffecto
内壁涂装作业测试
Inner wallpaintingoperation
每班首次
A.涂料体系：环氧树脂涂漆都要做涂料The first
Painting system：paint must
epoxy coatingbe done in
every shift
如果钢管表面均匀、没缺陷、就能达到满意的防腐效果
If the surface of pipes has nodefect, it can reach the satisfiedanticorrosion effect.
D.湿态厚度测量
Humidity thicknessmeasurement
每班首次涂漆都要做
The firstpaint mustbe done inevery shift
应该进行四次不同的测量。测量应选择在不同的部位
4 different measurements should bedone, which should choosedifferent locations.
E.干燥厚度测量
Dry thicknessmeasurement
每班首次涂漆都要做
The firstpaint mustbe done inevery shift
应该进行四次不同的测量.平均干燥厚度必须等于或大于业主要求后度
(单位：密耳)
4 different measurements should bedone, which the average drythickness must not less thanrequired thickness.

D。粘合力测试
Adhesion test
只要以前各步骤都取得了满意的结果if onlythe stepsbefore gotsatisfiedresult
应该按照 AWWA C210—97 〔5.2。3〕的要求进行刀削测试。只要刀削掉的材料最大长度不超过3.2毫米时，测试就合格.
Slicing test should be done as AWWAC210-97〔5。2。3〕 .If only thematerial length sliced is notexceed 3.2mm, the test can beregarded as qualified.

防腐类型：钢管内壁采用环氧树脂涂料
Anticorrosion type: epoxy coating paint used in inner wall of pipe。
执行规范：AWWAC210-97
Connector type: AWWAC210-97
序号number
阶段stage
检查内容
Inspection content
频率frequency
验收与拒收标准Acceptance and refusalstandard
4
内壁涂层检查
Inner wallcoatinginspection
E.开始前审核Auditing
只要以前各步骤都取得了满意的结果
If onlyevery stepcan getsatisfiedresulto
以下是应该进行测量并需记录的参数：钢管的前进速度钢管的旋转速度〔V旋转〕喷涂压缩机压力〔压力〕喷涂用的管嘴〔管嘴〕
喷涂期间管嘴和管壁之间的距离The following parametersshould be measured andrecorded： the proceedingvelocity,
The pressure of sprayingcompressor, the nozzle used inspraying, the distance betweennozzle and wall duringspraying。
5
内壁涂装作业
Inner wallpaintingoperation
A.喷涂环氧树脂涂料Spraying epoxycoating
1%的钢管1%pipe
应该采用连续喷涂的方法来喷涂环氧树脂涂料，并且平均干燥厚度必须等于或大于业主要求后度〔单位：密耳〕。喷涂时钢管的温度必须在露点以上3摄氏度。Adopt continuous spraying topaint epoxy coating and theaverage dry thickness must notbe less than the requiredthickness. 〔Unit : mil 〕 thepipe temperature whilespraying must be 3 °C above dewpoint.

F.原材料批控Raw material lotcontrol
所有批次的
原材料
All lot
material
钢管涂料中所使用的每一批原料都应在监控之中，以便于跟踪查找到钢管涂料的批次.
Each raw material used in paintshould be in monitoring so asto tracing the paint lot。
内壁涂层检查
Coatinginspectionfor innerwall
A.直观检验 1%的钢管intuitive 1% pipesinspection
成品涂层表面必须均匀，没有下陷、重叠或者气泡.钢管两头必须留出10厘米的未涂区.
The finished product coatingsurface must be uniform, nosink, lap or bubbleo 10cmuncoated area
Must be left at the both ends。
G.•厚度测量1%钢管
ThlCkneSS1% pipes
measurement
应按照第2.C部分的要求进行测量。平均干燥厚度必须等于或大于业主要求后度〔单位：密耳〕Measurement should be done asthe 2.C。 the average drythickness must not less thanthe required thickness。
H.硬度测量〔铅笔硬
度〕每班一次
HardnessOnceper
measurement〔pencil shift
hardness〕
涂层必须有韧性，用F铅笔至少能划3毫米长的线而没有划裂或没有擦伤
The coating must havetoughness,3mm line can bedrawn with F pencil, but nocrack, scratching
t 好人+、旬1、十每班一次
I.粘合力测试c
….―Once per
Adhesion test, . o
shift
应该按照 AWWA C210-97 〔5。2。3〕的要求进行刀削测试。只要刀削掉的材料长度最大不超过3。2毫米，测试就为合格。
Slicing test should be done asAWWA C210—97 〔5。2.3〕 .If onlythe material length sliced isnot exceed 3。2mm, the test canbe regarded as qualified.
J.缺陷检测1%钢管
Defect test1%pipe
待涂层固化以后,要利用缺陷检测器在涂料技术规范中规定的电压下对钢管进行检测。
After the coating solidifying,the pipe test should be donewith defect detector under thespecified voltage。

涂层修复
Coatingreparation
检测到缺陷的所有钢管
修复 repairAll pipes
that havedefects
待修复的区域必须进行清理，除去缺陷。修复面必须平整、光滑、以保证涂层和原涂层一样。
The area that need repairedmust be blast cleaning andremove the defect. Therepairing surface must beneat, smooth to keep thecoating accord with originalcoating。
修复检查Repairingandchecking
A.测量涂层厚度所有修复的
Measure the.
「.I°, .All revised
thickness of coating.
pipe
每次修复至少应进行两次测量。平均干燥厚度必须等于或大于业主要求后度〔单位：密耳〕。Everyrevision should do twicemeasurements.