Shanghai Daoqin Plastics Co., Ltd.

        1, polyethylene (PE) pipe/tube has which formed formed, it 们各起 what function?

        答: polyethylene (PE) pipe/tube is polyethylene (PE) resin is main/primary raw materials, add amount heat stabilized agent, color agent and processing additives extrusion molding made formed. heat stabilized agent antioxidant, function is or made polyethylene (PE) in processing process in high temperature oxidation; color agent (or light stabilizer), in polyethylene (PE) pipeline raw materials in generally is black or color, main/primary is is anti degradation and 起警示 function; processing additives function is improve/increase polyethylene (PE) processing properties.

        2, polyethylene (PE) pipeline versus for/regarding metal pipeline advantages has which?

        答: ① can consumption low, quality light, can recycling, is new generation environmental protection product, use lifespan long;

        ② 安装(连接) can 靠, 方便, can achieve multiple 特殊场 combined use requirements, for tube/pipe requirements low;

        ③ can property good, resistant 质运动 can force strong/high;

        ④ 卓越 corrosion resistant property can.

        3, currently use polyethylene (PE) raw materials PE63, PE80, PE100 is what 含义? it in use upper has what 差别?

        答:

        4, what is pipe/tube pressure （PN）, as pressure, design pressure and its 关系?

        答: pressure is pipe/tube 20℃持续输送 water as pressure. water temperature in 25℃-45℃ between different temperature degree decline 系数, positive as pressure.

        工 as pressure is pipeline positive as lower function in tube/pipe inner most large 持续运动 pressure, 不包括 water pressure.

         design pressure is pipeline system function in tube/pipe inner upper most large pressure. generally using/adopting as pressure and water pressure and.

        三者 关系: pressure ≥工 as pressure

         design pressure =1.5×工 as pressure

        工 as pressure tube/pipe water force 计算而 出.

        5, what is water pressure?

        答: pipeline system in, due to water speed 发生突然变化, generate 瞬时波动 pressure.

        6, SDR is what? it and pressure （PN） has 何关系?

        答: SDR is standards dimensions ratio, is outer and 公称壁 thick ratio value, 即SDR=dn/en. SDR越 large, pressure can force low;反之SDR越 small, pressure can force high. PE to water pipeline SDR and PN 关系如 lower table/sheet:

polyethylene (PE) (PE80) to water pipeline pressure (MPa)

polyethylene (PE) (PE100) to water pipeline pressure (MPa)

        7, PE pipeline methods has large type?

        答: PE pipeline main/primary has below/following types methods:

         hot 熔连接——包括: hot for 接连接, hot 熔承插连接, hot type 连接.

         electrical 熔连接——包括: electrical sleeve/set 接, electrical type 连接.

        8, pipe/tube tube/pipe shrink is how to formed?

        答: polyethylene (PE) pipe/tube tube/pipe shrink issues is polyethylene (PE) pipe/tube production in can 避免. this is is polyethylene (PE) pipe/tube production is using/adopting in 空定径喷淋 cooling method, in production main/primary pipe/tube internal gas pressure will pipe/tube pressure to sleeve/set upper 面, pipe/tube external is cooling water, therefore, pipe/tube cooling is outer toward inner. due to pipe/tube ring toward in force, tube/pipe in 锯切时, 端口 应 force by 释放出, formed shrink 口. shrink degree can through process adjustment, can 避免, therefore amount pipe/tube outer 径时, in pipe/tube 端口处测 amount, 否则测 amount value can true 实情况.

        9, pipeline in is what need 设置排 gas 阀? how to 设置?

        答: pipeline in process in, water in gas will in pipeline high 位积累起, 甚至形 formed gas retardant. tube/pipe in water 流发生波动时, 隆起 部位形 formed gas 囊, 会不断 by pressure shrink, expand 张, gas pressure shrink rear generate very large pressure strong/high, need ratio water by pressure shrink generate pressure strong/high large good 几十倍甚至几百倍, pipeline easy 发生破裂, therefore pipeline design 时考虑安装排 gas 阀.

        10, used for production HDPE燃 gas tube/pipe, to water tube/pipe raw materials is what Model/Grade?

        答: used for production HDPE燃 gas tube/pipe and to water tube/pipe raw materials is PE80 and PE100.

        11, polyethylene (PE) tube/pipe classification?

        答: according to application separation: outer to water tube/pipe, construction to water tube/pipe, construction water tube/pipe, 埋 排 water tube/pipe, gas tube/pipe, electrical sleeve/set tube/pipe, use tube/pipe, industrial use tube/pipe, hot water 采暖, tube/pipe and other;

         according to material density separation: high density polyethylene (PE) tube/pipe, in density polyethylene (PE) tube/pipe, low density polyethylene (PE) tube/pipe;

         according to structure separation: light slip polyethylene (PE) tube/pipe, di 壁波纹 tube/pipe, 螺旋缠绕 tube/pipe and other.

        12, polyethylene (PE) tube/pipe color classification?

        答: PE to water tube/pipe: GB13663规定, to water use polyethylene (PE) is color or black add strip/profile;

        PE polyethylene (PE) gas tube/pipe: GBl5558.1规定, gas use polyethylene (PE) pipeline color is color or black add strip/profile.

        13, PE80 and PE100 comparison?

        答: polyethylene (PE) in 20℃ long liquid pressure strong/high degree lower, application to 50 year 时, material by bad ring toward force value, in 8.0～9.99MPa is PE80, in 1.0～12.49MPa is PE100, this is polyethylene (PE) material and other grade and strong/high degree design based on.

        二者 property can difference is:

        ① tensile property can: PE100 tensile strong/high degree ratio PE80 high 出20%;

        ② impact resistant property can: PE100 impact resistant property can ratio PE80 high;

        ③ bending property can: PE100 flexural modulus ratio PE80 high 出20%;

        ④ 承 pressure can force: PE100 承 pressure can force ratio PE80 high;

        ⑤ resistant fast, slow speed cracks growth can force: PE100 ratio PE80 high.

        14, what is tube/pipe?

        答: is non 开挖施工 methods, is types 不开挖 or less pipeline 埋设施工 technology. this for 交通繁忙, 人口密集, construction material more, lower tube/pipe complex is non important.

        15, di 壁波纹 tube/pipe and mono 壁波纹 tube/pipe difference?

        答: mono plastics tube/pipe is plastics tube/pipe inner, outer tool has pipe/tube, tool has high rigid property, can bending, long 卷装.

         di 壁波纹 tube/pipe is inner light slip outer tool has plastics tube/pipe, it is meanwhile extrusion outer and light slip inner one-time 熔结挤 pressure molding. using/adopting in ring rigid degree and good strong/high degree and tough property. in meet/satisfy strong/high degree, rigid degree requirements lower, using/adopting di 壁波纹 tube/pipe can ratio plastics tube/pipe 节约材 material 30%-50%.

        16, 市政道路 generally selection types pipe/tube?

        答: ① water tube/pipe; ②PE di 壁波纹 tube/pipe; ③U-PVC add tube/pipe

        17, di 壁波纹 tube/pipe has applications?

        答: di 壁波纹 tube/pipe main applications as pressure in 0.6MPa below/following large type water, water, water, 排污, gas, iron 通风, 矿井通风, 农田灌溉 and other.

        18, what is as temperature degree for pipeline as pressure decrease 系数? polyethylene (PE) pipeline system for temperature degree pressure decrease is how much?

        答: pipeline in 20℃ above as temperature degree lower use, as pressure and in 20℃时工 as pressure ratio value.

        当 polyethylene (PE) pipeline system in 20℃ above temperature degree use 时, most large as pressure (MOP)应按 lower 式计算: MOP=PN×f1 ......(式 in, f1---折 decrease 系数, its data in lower table/sheet 查取.)

50 year lifespan requirements, 40℃ below/following temperature degree pressure decrease 系数

        19, what is ring rigid degree SN? SN4 and SN8各代 table/sheet what?

        答: upper currently 都广泛 application ring rigid degree this value indicators table/sheet plastics 埋 排 water tube/pipe resistant outer pressure negative can force. if pipe/tube ring rigid degree small, pipe/tube can can large deformation or pressure 屈失稳破 bad. 反之, if ring rigid degree selection high, using/adopting large 截面惯 property 矩, will formed use material more, cost high.

        SN4 and SN8代 table/sheet is ring rigid degree different, SN4代 table/sheet ring rigid degree ≥4KN/㎡, SN8代 table/sheet ring rigid degree ≥8KN/㎡.

        20, different ring degree 橡胶圈 is general purpose?

        答: can general purpose.

        21, PE pipe/tube applications has which?

        答: PE pipe/tube can 广泛 应 used for 城镇供 water system, food, chemical industry field/area system, 矿砂, 泥浆输送 system, 园林绿化 tube/pipe 网, water tube/pipe, iron tube/pipe and tube/pipe and other field/area.

        22, what is masterbatch? is need in pipe/tube inner use masterbatch?

        答: high temperature melt 时改变 plastics color material 质. add masterbatch is make pipe/tube light, anti outer 线 照射 make tube/pipe inner generate material.

        23, liquid pressure experiment/testing is pipe/tube what property can?

        答: liquid pressure experiment/testing is pipe/tube long strong/high degree property can.

        24, what is melt quality flow speed rate?

        答: melt quality flow speed rate is thermoplastic property plastics in temperature degree and negative lower, melt 每10min through standards quality, use MFR table/sheet 示, its value is table/sheet thermoplastic property plastics in melt 状态时 viscous features important technology indicators, it can used for production, processing and molding process in raw materials and products quality control, process selection, separation parameters research and other. if material processing front rear melt quality flow speed rate ultra- 出 standards requirements, processing process in 出现 材 material obvious degradation, from reduce pipe/tube property can.

        25, pipe/tube outer surface has causes? how troubleshooting?

        答: can can causes: machine temperature degree high, cooling 不足.

         troubleshooting methods: reduce machine temperature degree, increase large cooling water amount

        26, inner generate strip/profile causes? how troubleshooting?

        答: can can causes: rod temperature degree low.

         troubleshooting methods: rise high rod temperature degree.

        27, inner has bubbles, causes? how troubleshooting?

        答: can can causes: material material 受潮.

         troubleshooting methods: for raw materials 进行预 drying.

        28, pipe/tube thick non-uniform causes? how troubleshooting?

        答: can can causes: 口模, in has for positive.

         troubleshooting methods: 请专门人员校验, or heavy new design.

        29, pipe/tube bending or causes? how troubleshooting?

        答: can can causes: ① 口模芯模 different 心;② machine 头四周 temperature degree non-uniform, material 不均;③ cooling water supply amount non-uniform;④牵引 machine 橡皮输送 belt/tape small, 夹 紧.

         troubleshooting methods: ① adjustment 口模芯模 间隙, make 同心;② adjustment add hot temperature degree uniform;③适当 adjustment cooling water amount and toward;④ adjustment belt/tape 间隙.

        30, tube/pipe local thin transparent causes? how troubleshooting?

        答: can can causes: ① machine temperature degree high;② cooling type ring water amount small.

         troubleshooting methods: ① 适当 reduce machine temperature degree;②适当 add large water amount.

        31, inner has or causes? how troubleshooting?

        答: can can causes: ① machine temperature degree non-uniform or local temperature degree high;② pressure shrink gas pressure low.

         troubleshooting methods: ① 适当 adjustment machine temperature degree make uniform;②适当 improve/increase pressure shrink gas.

        32, or 拉不出 causes? how troubleshooting?

        答: can can causes: ① machine design combined 理;② cooling type ring water amount large or small;③ pressure shrink gas to amount large.

         troubleshooting methods: ① 修整 machine 头;② control cooling type ring water amount;③ decrease small pressure shrink gas to amount.

        33, pipe/tube surface coarse causes? how troubleshooting?

        答: can can causes: ① material material water separation more;② material temperature low;③口模不洁净;④ extrusion speed degree fast.

         troubleshooting methods: ①调 high drying device temperature degree make material material drying;② adjustment process temperature degree;③清洁口模;④ adjustment extrusion speed degree.

        34, pipe/tube surface has light 亮 斑 block causes? how troubleshooting?

        答: can can causes: ① 口 mold temperature degree high;② cooling 不够.

         troubleshooting methods: ① reduce mold temperature degree;② add strong/high cooling.

        35, pipe/tube surface causes? how troubleshooting?

        答: can can causes: ① material 流发生脉动;②牵引 speed degree 不稳.

         troubleshooting methods: ① adjustment extrusion speed degree;②修理牵引调 speed system.

        36, pipe/tube causes? how troubleshooting?

        答: can can causes: ① true degree small;② extrusion speed degree fast;③牵引 cooling 不够;④ cooling water water high.

         troubleshooting methods: ① adjustment true degree;② adjustment extrusion and speed degree;③ adjustment cooling water amount and temperature degree;④ reduce cooling water water 位.

        37, pipe/tube in has causes? how troubleshooting?

        答: can can causes: ① 滤网破 loss;② plastics degradation;③ poor filler or masterbatch material.

         troubleshooting methods: ① more 换滤网;② adjustment process temperature degree;③ more filler or masterbatch material.

        38, pipe/tube bending causes? how troubleshooting?

        答: can can causes: ① pipe/tube thick non-uniform;② pipe/tube cooling non-uniform;③ pipe/tube cooling separation.

         troubleshooting methods: ① adjustment pipe/tube thick;② adjustment cooling water nozzle;③ adjustment cooling water amount and temperature degree or reduce extrusion speed degree.

        39, combined material causes? how troubleshooting?  

        答: can can causes: ① 口模定 type long degree 不够;② melt temperature degree low;③ machine structure combined 理.

         troubleshooting methods: ① add long 口模定 type long degree;② improve/increase process temperature degree;③ selection structure combined machine 头.

        40, material drying temperature degree large is how much?

        答: drying temperature degree large in 80℃ left right.

        41, PPR pipe/tube upper strip/profile and strip/profile separation table/sheet tube/pipe?

        答: strip/profile PPR is cold water tube/pipe;红线 strip/profile PPR is hot water tube/pipe.

        42, PPR tube/pipe applications?

        答: PPR tube/pipe can used for active use water, pure water, hot water, sheet/plate 辐射采暖 system use pipe/tube.

        43, PPR pipe/tube and metal pipe/tube difference?

        答: for/regarding thermoplastic property material, in force function lower tool has ratio metal more is creep property can, tool has significantly property features.

        44, PPR pipe/tube specifications table/sheet methods?

        答: PPR pipe/tube specifications use tube/pipe series S, outer 径dn, 公称壁 thick en table/sheet 示.

        45, what is tube/pipe series S? methods is what?

        答: tube/pipe series is for is pipe/tube thick.

        计算 methods: S= pipe/tube design force / pipe/tube design pressure, or S=(dn-en)/ 2 en

        46, tube/pipe series S separation is types?

        答: has S5, S4, S3.2, S2.5, S2.

        47, how to selection tube/pipe series S?

        答: S越 large for tube/pipe thin, therefore selection S必 must small or and other 于计算 S, can ensure use safety and use lifespan.

        48, PPR pipe/tube specialized material 贮存?

        答: in drying, 通风, 清洁并 maintain has good anti 设施 仓库 inner, 贮存时应远离 hot anti cationic light 直射, in 露天堆放.

        49, PP－R tube/pipe is 何不滋生 fine 菌, 不结垢?

        答: PP-R pipe/tube material is random copolymer polypropylene (PP), is low property saturated and 脂肪烃 long polymer, its products PPR tube/pipe tool has relatively low surface force, water method lubricating tube/pipe 壁, make in relatively high temperature degree 时, water can lubricating pipeline surface. PP-R材 material 本身极 difficult as is fine 菌 养 material, therefore fine difficult in pipeline surface 附 滋 long, water in 钙, 镁离子也 difficult in tube/pipe upper 浸积结垢.

        50, PP－R pipe/tube material is modified polypropylene (PP), is what 无毒, 无味?

        答: PP-R pipe/tube specialized material is a small amount of ethylene and propylene, using/adopting gas versus copolymer method random polymerization formed, is chemical modified, different generally add other additives material modified. its separation long 链仅由C, H两元素组 formed, 不含任何 has 毒元素, 也不释放 has material 质, separation rear generate oxidation carbon and water, waste material can recycling use. therefore PP-R tube/pipe 无毒, 无味, green building materials.