【正文】 test group before valve inspection, which include construction team, relative technique personnel, quality inspector. Meanwhile We will transfer necessary technique information and assemble proper work equipment.、試驗(yàn)程序見圖31。當(dāng)不合格時(shí)，應(yīng)再抽查20%抽查，仍然不合格時(shí)，該批閥門不得使用。不銹鋼閥門試驗(yàn)用水的氯離子含量不得超過25ppm. Clean water should be used in the valve shell pressure and densification test .The content of chlorine used in stainless steel valve should not overpass 25ppm；試驗(yàn)時(shí)間不得少于5min，以殼體、填料無滲漏為合格。Except back and throttling valves, valve qualified inspection shall be determined by nominal pressure and no leakage in the densification area of valve petal.，且公稱直徑大于等于600的閘閥，殼體壓力試驗(yàn)宜在系統(tǒng)試驗(yàn)時(shí)，按系統(tǒng)的試驗(yàn)壓力進(jìn)行試驗(yàn)，閘板密封試驗(yàn)可采用色印等方法進(jìn)行檢驗(yàn)，接合面上色印應(yīng)連續(xù)。 The shell material of alloy steel valve should be analyzed one by one by high speed spectra. If unqualified valves in it, this batch of valves are forbidden to using.，應(yīng)及時(shí)排凈內(nèi)部積水、吹干密封面上應(yīng)涂防銹油，關(guān)閉閥門，封閉出入口。3%。調(diào)壓時(shí)的壓力應(yīng)穩(wěn)定，每個(gè)安全閥啟閉次數(shù)為3次。由于安全閥進(jìn)出口壓差較大，不進(jìn)行殼體壓力試驗(yàn)，密封試驗(yàn)時(shí)，壓力小于定壓值，不得泄漏，可在安全閥出口貼紙進(jìn)行目測。 Quality inspector shall make detailed inspection record for verifying anytime. 裝置區(qū)工藝管道材料經(jīng)檢查合格后，均將做出不同色標(biāo)加以標(biāo)識。各種管道配件在易于辨認(rèn)處做出兩處標(biāo)識，各種管材、型材均做出通長標(biāo)識。管道預(yù)制加工廠設(shè)有軌道式天車、車床、搖臂鉆床、剪板機(jī)、坡口加工機(jī)、自動焊機(jī)等施工機(jī)具。Before prefabrication, We will check the isolated drawings and plans carefully , align the foundations ,equipments, pi≤pe frames ,embedded parts and preformed holes in correct, and consider the welding position and adjust the size under the actual construction condition to the piping sections closed last. 管道預(yù)制應(yīng)按單線圖規(guī)定的數(shù)量、規(guī)格、材質(zhì)選配管道組成件，預(yù)制過程中的每一道工序均應(yīng)核對管子的標(biāo)記，并做好標(biāo)記的移植，做到用料正確、尺寸準(zhǔn)確、標(biāo)識明顯。管子切口表面應(yīng)平整、無裂紋、重皮、毛刺、凸凹、縮口、熔渣、氧化物、鐵屑等。 For galvanized steel tubes and carbon steel tubes with nominal diameter ≤50 using mechanical cutting .For carbon steel tubes with nominal diameter less than DN50 using oxygen acetylene cutting ,For stainless steel tubes using applied mechanical or plasma cutting ,For steel tubes with specification of 304L,314L and 317L using abrasive wheel cutting or another alternative using special emery plate to grind. Tube cutting should be flat and smooth and no cracking, sand crust, fins ,uneven open track ,melted residue ,scrap and oxidization. 預(yù)制好的管段，按單元或區(qū)域擺放整齊，以便于運(yùn)輸和安裝。管道焊接、無損檢測工作完成后，應(yīng)在預(yù)制廠內(nèi)除銹、噴砂和防腐，但焊口兩側(cè)各100mm的范圍內(nèi)不允許涂漆，焊工鋼印號、管道編號以及管線號不允許涂漆，待系統(tǒng)水壓試驗(yàn)合格后再進(jìn)行防腐涂漆。Prefabricated piping section shall be laid in order to transportation and erection. We will weld plying with regulated welding process. After piping welding and nondestructive test. The derusting, blasting and antirotting steps should be done in the prefabrication yard. But 100mm away form two sides of welding joints and welder’s sign, piping number and pipeline number are not permit to paint, it should be done after system water pressure test qualified. In order to ensure welding quality, all the process piping use argon continuation welding . 預(yù)制完成的管段進(jìn)行管線號、預(yù)制管段號標(biāo)識，并用人工或壓縮風(fēng)將管膛內(nèi)清除干凈，用塑料布封閉管口分門別類擺放。We make identification tags for pipeline number and prefabrication piping section number which are pleted the prefabrication, clean piping inside by hand and pressure wind, Classify and lay down them with piping mouth closed by plastic cloth. When cutting and storing ,stainless steel and carbon steel should be divided strictly.7 管道焊接 Piping weldingPTA裝置焊接工程中，工藝管道母材的不銹鋼比例在60℅以上，且有鈦一類特殊材質(zhì)的管道，焊接難度大、工藝標(biāo)準(zhǔn)要求高是該工程的主要特點(diǎn)。In PTA assembly welding process, Because there is 60% of stainless steel in process piping parent material and piping has the especial titanium, the main character of the project is the difficult welding and high requirements of process standard. Welding quality determine the overall erection project quality. we will control the welding material, welding process, welding operation ,welding inspection and so on to ensure welding quality and every welding steps in control.焊材型號和規(guī)格選用應(yīng)嚴(yán)格執(zhí)行焊接工藝評定。The utilization of the welding models and specification shall be strictly plied with welding process qualification such as checking before welding and correcting the distance in continued joints and misalignment. We will notice welding operation effects by native environment, check welding joints surface quality and twisted angels after welding ,make quality qualification in time ,execute nondestructive inspection with requirements and make record of welding construction in time.7. 1 焊接施工一般要求 General requirement of welding construction 焊工應(yīng)在合格的焊接項(xiàng)目內(nèi)從事管道的焊接，且在有效期內(nèi)。 Welding material should have qualified production certificates and acceptable after checking again. 焊條應(yīng)按說明書或焊接作業(yè)指導(dǎo)書的要求進(jìn)行烘干，并在施焊過程中，使用保溫筒保持焊條干燥。焊接工藝卡應(yīng)按與之相對應(yīng)鋼材的焊接工藝評定進(jìn)行編制，并按程序進(jìn)行審批。 Welder’s stamps NO. shall be made in the 50mm range away from welding joints in time, Rebar marks will not be done in stainless steel tubes, but it should be indicated in piping isolated drawings. 焊接材料的選擇 Welding Material Alternative焊接材料選用表 51List for Welding Material Alternative 序 號No. 管 道 材 料Piping material 焊 絲Welding wire 焊 條Welding rod 備 注Remarks1API5L GR BER1052E701615 2ANSI 304ER308E30816 3 ANSI 304LER308LE308L16 4 ANSI 316ER316E31616 5 ANSI 316LER316LE316L16 6ANSI 317LER317LE317L16 7C276ERNiCrMo4EniCrMo4 8 TI 1ERTi1 奧氏體不銹鋼管道焊接 Stainless piping welding ： The groove spec and size of stainless steel tubes should ply with following regulation:焊接坡口形式和尺寸 Welding Groove Type and Size 52序厚度δ(mm)Thickne