管件标准中英文对照

碳钢弯头 Carbon Steel Elbow不锈钢弯头 Stainless Steel Elbow高压弯头 High-Pressure Elbow同心异径管 Concentric Reducers偏心异径管 Eccentric Reducers高压异径管 High-pressure Reducers不锈钢等径三通 Stainless Straight Tee碳钢等径三通 Carbon Straight Tee不锈钢等径四通 Stainless Straight Cross高压三通 High-pressure Tee锻制三通 Forged Tee异径接头 Template 管帽 Caps 法兰flange长径和短径弯头 long and short radius elbows同心和偏心异径接头 concentric and eccentric reducers等径和异径三通 straight and reducing outlet tees大小头 CONCENTRIC REDUCER相等的三通Tee Equal等径三通Straight Tee异径三通Reducing Tee等径四通Straight Cross90°短半径弯头90°SS Elbow(SR) U型管Return Bend90°长半径弯头90°SS Elbow (LR)高压厚壁弯头Thickness Elbow盲法兰Blank Flange 弯管Bends翻边stub ends 异径接头reducers 公称通径 nominal diameter外径(mm) outside diameter 中心距至端面的距离center to end理论重量(kg/pcs) approx weight类种description 标准Standard类型Design 材质Material 双丝头 Nipple同心异径短节 SWAGE Nipple活接头 Union PLUG HEX HEAD六角管堵 PLUG HEX HEADSCRD六角螺纹管堵MPT螺纹 RC螺纹螺桩 stud SWAGE (CONC)同心异径短节单承口管箍 Half-Coupling 异径管箍Coupling, Reducing盲板 Blind Flange 带双圈的盲板spectacle blind 偏心的Ecentric 等径直通equal coupling内牙直通 female coupling外牙直通 straight tube with outside90等径弯头 90 equal elbow45等径弯头 45 equal elbow外牙弯头 male elbow内牙弯头 female elbow 等径三通 equal tee异径三通 reducing tee内牙三通female tee外牙三通 male tee 管帽cap拆除:dismantle 结头（管线的）：tie-in插盲板：slip spade 盲板：blank接头：fitting 加热器：heater金属缠绕垫片（带外环）:SW with outside ring 热轧on site: 管汇manifold3. 对焊管座weldolet 对焊支管台nipolet--短管支管台welding plate flange焊接板式法兰..threaded (THD) 螺纹的.sockolet 承插焊支管台...thredolet 螺纹支管台.3. 短节、双丝头 nipple... nipple 螺纹接头短节SWAGE nipple... 活接头 Union4. 螺纹接套；喷嘴nipper 钳子；拔钉钳...nipple 螺纹接套；喷嘴...noiseabatement measure 减低噪音措施1. 弯头支管台elbolet|弯头支管台...elbolet|弯头支管台...elbow|弯头2. 螺纹支管台；弯头管座elastometric lining橡胶内衬...elbolet螺纹支管台；弯头管座3. 斜接支管台Sockolet弯头支管台...elbolet斜接支管台trolet镶入式支管嘴Seamless---无缝的equal-----相等的，同样的Reducers----异径的，不同的blind flange--法兰堵板/盲板法兰盲法兰法兰-FLANGEblind--法兰盖,盲目的HEX==hexagon(六角形;六边形)Head--上端;前端头PLUG—管赌NIPOLET—短管斜支管台支管台NIPPLE—螺纹短节PLUG—丝堵SCD NPT--是符合NPT标准的螺纹C.STL A105 TO AP SPEC 4WPI-MWCF01 分开解释如下C.STL A105 材料标准TO AP SPEC 4WPI-MCCN01 应该符合AP（air product）规范4WPI-MCCN01BLE/PSE 大头破口，小头平面SWAGE, CON, BLE/PSE-----异径管短节同心大头破口，小头平面“o-let”=管支台螺纹支管台 threadolet 焊接支管台 weldolet 承插支管台 sockolet弯头支管台 elbolet 斜支管台latrolet 镶入式支管嘴sweeplet 短管支管台npolet Socketweld--承插焊接Forged CS碳钢锻件。

管道及配件中英文对照化工管道词汇翻译1 管道组成件Piping component1.1 管子Pipe管子(按照配管标准规格制造的) pipe管子（不按配管标准规格制造的其他用管）tube钢管steel pipe铸铁管cast iron pipe衬里管lined pipe复合管clad pipe碳钢管carbon steel pipe合金钢管alloy steel pipe不锈钢stainless steel pipe奥氏体不锈钢管austenitic stainless steel pipe铁合金钢管ferritic alloy steel pipe轧制钢管wrought—steel pipe锻铁管wrought—iron pipe无缝钢管seamless (SMLS）steel pipe焊接钢管welded steel pipe电阻焊钢管electric—resistance welded steel pipe电熔（弧）焊钢板卷管electric-fusion （arc）—welded steel-plate pipe 螺旋焊接钢管spiral welded steel pipe镀锌钢管galvanized steel pipe热轧无缝钢管hot—rolling seamless pipe冷拔无缝钢管cold-drawing seamless pipe水煤气钢管water-gas steel pipe塑料管plastic pipe玻璃管glass tube橡胶管rubber tube直管run pipe；straight pipe1。

2 管件Fitting弯头elbow异径弯头reducing elbow带支座弯头base elbow长半径弯头long radius elbow短半径弯头short radius elbow长半径180°弯头long radius return短半径180°弯头short radius return带侧向口的弯头（右向或左向）side outlet elbow (right hand or left hand)双支管弯头（形）double branch elbow三通tee异径三通reducing tee等径三通straight tee带侧向口的三通(右向或左向）side outlet tee (right hand or 1eft hand）异径三通（分支口为异径）reducing tee （reducing on outlet）异径三通（一个直通口为异径）reducing tee （reducing on one run）带支座三通base tee异径三通(一个直通口及分支口为异径）reducing tee （reducing on one run and outlet)异径三通（两个直通口为异径，双头式）reducing tee （reducing on both runs，bull head）45°斜三通45°lateral管道及配件中英文对照245°斜三通(支管为异径）45°lateral (reducing on branch）45°斜三通(一个直通口为异径）45°lateral （reducing on one run)45°斜三通（一个直通口及支管为异径）45°lateral (reducing on one run and branch)Y型三通（俗称裤衩）true “Y”四通cross等径四通straight cross异径四通reducing cross异径四通(一个分支口为异径)reducing cross （reducing on one outlet)异径四通(一个直通口及分支口为异径) reducing cross （reducing on one run and outlet）异径四通（两个分支口为异径）reducing cross （reducing on both outlet）异径四通(一个直通口及两个分支口为异径）reducing cross (reducing on one run and both outlet）异径管reducer同心异径管concentric reducer偏心异径管eccentric reducer锻制异径管reducing swage螺纹支管台threadolet焊接支管台weldolet承插支管台sockolet弯头支管台elbolet斜接支管台latrolet镶入式支管嘴sweepolet短管支管台nipolet支管台，插入式支管台boss（以上带红线的单词已经查过，应该是行业很组合的名词,可以查得到）.管接头coupling，full coupling半管接头half coupling异径管接头reducing coupling活接头union内外螺纹缩接(俗称补芯）bushing管帽cap （C)堵头plug短节nipple异径短节reducing nipple；swage nipple两端无螺纹PBE plain both end一端平口POE plain one end一端螺纹TOE thread one end两端螺纹TBE thread both end1.3 弯管Bend预制弯管fabricated pipe bend跨越弯管（形）cross—over bend偏置弯管（~ 形）offset bend90°弯管quarter bend环形弯管circle bend单侧偏置90°弯管(？形）single offset quarter bendS形弯管“S”bend单侧偏置U形膨胀弯管(| ？形）single offset “U”bendU形弯管“U”bend双偏置U膨胀弯管double offset expansion “U”bend斜接弯管mitre bend三节斜接弯管3-piece mitre bend折皱弯管corrugated bend圆度roundness1.4 法兰Flange （FLG）整体管法兰integral pipe flange钢管法兰steel pipe flange螺纹法兰threaded flange滑套法兰（包括平焊法兰）slip—on flange (SO); slip—on welding flange 承插焊法兰socket welding flange松套法兰lap joint flange （LJF）对焊法兰welding neck flange (WNF）法兰盖blind flange, blind孔板法兰orifice flange异径法兰reducing flange盘座式法兰pad type flange松套带颈法兰loose hubbed flange焊接板式法兰welding plate flange对焊环welding neck collar （与stub end相似）平焊环welding—on collar突缘短节stub end，lap翻边端lapped pipe end松套板式法兰loose plate flange压力级pressure rating, pressure rating class压力-温度等级pressure—temperature rating法兰密封面,法兰面flange facing突面raised face (RF）凸面male face (MF）凹面female face (FMF）榫面tongue face槽面groove face环连接面ring joint face全平面;满平面flat face；full face (FF）光滑突面smooth raised face （SRF）法兰面加工facing finish粗糙度roughness光滑的smooth齿形serrated均方根root mean square (RMS)算术平均粗糙高度arithmetical average roughness height (AARH）配对法兰companion-flange螺栓圆bolt circle （B.C.)1.5 垫片Gasket （GSKT)垫片的型式type of gasket平垫片flat gasket环形平垫片flat ring gasket平金属垫片flat metal gasket夹棉织物的橡胶elastomer with cotton fabric insertion夹石棉织物的橡胶elastomer with asbestos fabric insertion夹石棉织物及金属丝加强的橡胶elastomer with asbestos fabric insertion and with wire reinforcement无石墨压缩白石棉垫片non graphited compressed white asbestos gasket天然白橡胶垫片natural white rubber gasket压缩石棉垫片compressed asbestos class gasket浸聚四氟乙烯的石棉垫片PTFE impregnated asbestos gasket夹石棉的缠绕金属垫片spiral-wound metal gasket with asbestos filler内环inner ring外环,外定位环outer ring波纹金属垫片corrugated metal gasket波纹金属包嵌石棉垫片corrugated metal gasket with asbestos inserted双夹套波纹金属包石棉垫片corrugated metal double jacketed asbestos filled gasket双夹套垫片double jacketed gasket金属包石棉平垫片flat metal jacketed asbestos filled gasket整体金属齿形垫片solid metal serrated gasket槽形金属垫片grooved metal gasket环形连接金属垫片ring joint metal gasket八角环形垫片octagonal ring gasket椭圆环形垫片oval ring gasket透镜式垫片lens gasket非金属垫片non—metallic gasket1.6 阀门Valve1。

管件中英文对照表-CAL-FENGHAI.-(YICAI)-Company One1弯头 elbow异径弯头 reducing elbow带支座弯头 base elbow长半径弯头（标准倍弯曲半径）long radius elbow三通 tee异径三通 reducing tee等径三通 straight tee带侧向口的三通（右向或左向） side outlet tee (right hand or 1eft hand)异径三通（分支口为异径） reducing tee (reducing on outlet)异径三通（一个直通口为异径）reducing tee (reducing on one run)带支座三通 base tee异径三通（一个直通口及分支口为异径） reducing tee (reducing on one run and outlet)异径三通（两个直通口为异径，双头式） reducing tee (reducing on both runs, bull head)45°斜三通 45° lateral45°斜三通（支管为异径） 45° lateral (reducing on branch) 45°斜三通(一个直通口为异径) 45° lateral (reducing on one run)45°斜三通(一个直通口及支管为异径) 45° lateral (reducing on one run and branch)Y型三通（俗称裤衩）true “Y”四通 cross等径四通 straight cross异径四通 reducing cross异径四通（一个分支口为异径）reducing cross (reducing on one outlet)异径四通（一个直通口及分支口为异径） reducing cross (reducing on one run and outlet)异径四通（两个分支口为异径） reducing cross (reducing on both outlet)异径四通（一个直通口及两个分支口为异径） reducing cross (reducing on one run and both outlet)异径管 reducer同心异径管 concentric reducer偏心异径管 eccentric reducer锻制异径管 reducing swage螺纹支管台 threadolet焊接支管台 weldolet承插支管台 sockolet弯头支管台 elbolet斜接支管台 latrolet镶入式支管嘴 sweepolet短管支管台nipolet支管台，插入式支管台 boss螺纹支管台Threadolet弯头支管台elbolet焊接支管台weldolet；on weld短管支管台nipolet承插支管台sockolet烧焊支管台weldolet斜接支管台latrolet承插焊支管台Sockolet支管台，插入式支管台boss管接头 coupling, full coupling 半管接头 half coupling异径管接头 reducing coupling活接头 union内外螺纹缩接（俗称补芯） bushing管帽 cap (C)堵头 plug短节 nipple异径短节 reducing nipple; swagenipple管道英文缩写A Anchor 固定ABS * Absolute 绝对的AISI *American Iron and Steel Institute美国钢铁学会ANSI * American National Standards Institute 美国国家标准学会API *American Petroleum Institute 美国石油学会APPROX *Approximate 大约，近似的ASB Asbestos 石棉?ASME *American Society Of Mechanical Engineers美国机械工程师协会ASSY * Assembly 装配，组装ASTM * American Society Of Testing Material 美国材料实验协会ATM * Atmosphere 大气压AWG * American Wire Gage 美国线规AWS * American Wel**** Society 美国焊接协会AWWA * American Water Works Association 美国水工协会B?BB Bolted Bonnet 栓柱连接的阀盖BB By Buyer 买方供货B-B Beveled End-Beveled End 两端为坡口端BC Bolt Circle 螺栓中心圆?Bolted Cover(cap) 螺栓连接的阀兰盖（帽）BE Beveled End (for wel****) 坡口（焊接用）Bell End 承口BEP Both Ends Plain 两端平BET Both Ends Threaded 两端带螺纹BL Battery Limit 装置区边界BF Blind Flange 盲板法兰BLD Blind盲板BLDG *Buil**** 建筑物BM Bill Of Material 材料表BOP Bottom Of Pipe 管底B-P Beveled End —Plain End 坡口端.平端BV Butterfly valve 蝶阀BWG * Birmingham Wire Gage 伯明翰线规BW Butt Weld 对焊CC Cap 管帽C-C Center to Center 中至中C-E Center to End 中至端面C-F Center to Face 中至面CH-OP Chain Operated 链条操纵的Checkered Plate 花纹钢管*Cast Iron 铸铁CL *Class 英制压力等级，等级，种类CLEAR Clearance 间隙COD Continued on Drawing 接续图COL *Column 柱，塔CONC Concentric 同心的CONN Connection 连接，接口CONT *Continue 连续. Control Valve 控制阀CPLG Coupling 管接头，连轴节. Concentric Reducer 同心异径管. *Carbon Steel 碳钢. Cold Spring 冷紧Car Seal Close 在关闭状态下封住Car Seal Open 在开启状态下封住CUST Customer 客CH Check Valve 止回阀DEG *Degree 度DF Drain funnel 排液漏斗DIA *Diameter 直径DIM *Dimension 尺寸DISCH *Discharge 出口，排出Diaphragm VELVE 隔膜阀DMF Double Male And Female 双重凹凸DN? Norminal Diameter公称直径DN Down 下DR Drain 排液DS Directional Stop 定向限为架DWG * Drawing 图EE *East 东EC External Coating 外面涂防腐层ECC Eccentric 偏心EFW Electric Fusion Welded 电容焊的EL(ELEV) *Elevation 标高；立面ELL Elbow 弯头EQIOP Equipment设备，装置EQUIV Equivalent 相当的. Eccentric Reducer 偏心异经管ERW Electric Resistance Welded 电阻焊的EW Eye Washer & Shower 洗眼器及淋浴器 Expansion Joint 膨胀节FFDN Foundation基础FF Flat Faced Or Full Faced 全平面；满平面F-F Face To Face 面至面FGW Fusion Gas Wel**** 气熔焊FIG *Figure 图FL Floor 楼面FLEX TUBE Flexible Tube 挠性管FLG Flange 法兰FLGD Flanged 法兰式的FLGF Flanged Face 法兰面FOB Flat On Bottom 底面平FOT Flat On Top 顶面平FP Fix Point 固定点FS Forged Steel 锻钢FTF Fitting To Fitting 管件直连FTG Fitting 管件FURND Furnished 提供的，装设的FW Field Weld 现场焊G Guide 导向GA * Gage 表，表压，规（线规）GALV *Galvanize 镀锌GL Ground Level 地面GLV Globe Valve 截止阀GEAR OP Gear Operated 齿轮传动的GMAW Gas Metal Arc Wel**** 金属极惰气体保护焊GSKT Gasket 垫片GTAW (Inert)Gas Tungsten Arc Wel**** 惰性气体保护钨极电弧焊GV Gate Valve 闸阀HH Hanger 吊架HC Hose Connection 软管接头Half Coupling 半节管接头HDR Header 总管HEX *Hexagon 六角形HF Hard Alloy Face on阀内件（阀心）为Valve Trim 硬质合金密封面HH Hand Hole 手孔HOR Horizontal 水平的* High Pressure 高压HS Hose Station 软管IID * Inside Diameter 内径IN * Inch 英寸INS Insulation 隔热INST Instrument仪表INV Invert (inside bottom of pipe) 管子内底IPS Iron Pipe size 铁管尺寸ISO Isometric Drawing 周测图（空视图）Inside Battery Limit 装置边界内恻ISNS Inside screw & Non-rising Stem 内螺纹非升杆ISRS Inside screw & Rising stem 内螺纹升杆JJT Joint 接头JS Jack Screw 顶开（起）螺栓LLC Locked Closed 在关闭状态下锁定LEP Large end plain 大端为平的LET Large end Threaded 大端带螺纹LG Long 长LGF Lens Gasket Face 透镜垫连接面. THD Left Hand Thread 左螺纹LIFT Lift Type 升降式LJ Lap Joint 搭接LJF Lap Joint Flange 松套法兰LO Locked Open 在开启状态下锁定. Low Pressure 低压LR Long Radius 长半径LRE Long Radius Elbow 长半径弯头LTG Large Tongue & Groove 大椎槽MMATL Material 材料MAX Maximum 最大MB Machine Bolt 机器螺栓（单头）MF Male and Female 凸和凹MFG Manufacture 制造MF * Manufacture 制造厂MH Manhole 人孔MI Malleable Iron 可锻铸铁MIN *Minimum 最小MJ Mechanical Joint 机械接头Match Line 连续线MSS * Manufacturers Standardization Society of the Valve and Fittings Industry, Inc.美国阀门和管件制造商标准化协会MTO Material take-off 材料统计MW Minimum Wall 最小壁厚. Mineral Wool 矿（物）棉NN * North 北NB Nominal Bore 公称孔径. Non-Bonnet 无阀盖NC Normally Closed 常闭NIP Nipple 短管NO Normally Open; 常开*Number号；数量NO INS No Insulation 不隔热NOM Nominal 公称的；额定的NOZ Nozzle 管口NPS Nominal Pipe Size 公称管径NPSH Net Positive Suction Head 净正吸入压头NPT *American National Taper 美国锥管螺纹Pipe ThreadNS Nominal Size 公称直径NV Needle Valve 针形阀OOD *Outside Diameter 外径OET One end Threaded 一端带螺纹OR Outside Radius 外半径ORF Orifice 孔板ORIENT Orientation 方位OS & Y Outside Screw and Yoke 外螺纹阀杆和阀轭OSNB Outside Screw Non-Bonnet 外螺纹无阀盖PP Plug 堵头PAP Piping Arrangement Plan管道布置平面图PB Pressure Seal Bonnet 压力密封的阀盖P-B Plain End –Bevel End 平端—坡口端PC Pressure Seal Cap 压力密封的阀帽Pitch Circle Diameter 节圆直径PE Plain End (not beveled) 平端（无坡口）PF Platform 平台PID Piping & Instrument Diagram管道及仪表流程图PN *Nominal Pressure 公称压力PN Plant North 工厂北向POS point of Support 支承点P-P Plain End—Plain End 两端为平端PREP Preparation 加工准备PSIA *Pounds Per Square InchAbsolute 磅/PSIG Pounds Per Square Inch Gage 磅/PT Point 点PTFE *Polytetrafluoroethylene 聚四氟乙烯Part No. 件号PV Plug Valve 旋塞阀PVC *Poly Vinyl Chloride 聚氯乙烯QQTY *Quantity 数量RR * Radius 半径RED Reducer 异径管REF Reference 参考REINF Reinforce 加强REQD Required 需要；申请REV *Revision 修改RF Raised Face 凸面RG Ring Gasket 环形垫片Right Hand Thread 右螺旋RJ Ring Joint 环垫接头RO Restriction Orifice 限流孔板RPM * Revolutions Per Minute 转/分RPS * Revolutions Per Second 转/秒RS Resting Support 支承架，滑动架RTJ Ring Type Joint（见RJ）RV Relief Valve 安全泄液阀SS *South 南S Spring 弹簧（管架用）SAW (Automatic)Submerged Arc Wel**** 自动埋弧焊SB Stud Bolt 双头螺栓SB Screwed Bonnet 螺纹阀盖SC Sample Cooler 取样冷却器SCH * Schedule 管壁厚系列号SCRD Screwed 螺纹SEP Small end Plain 小端为平的SET Small end Threaded 小端带螺纹SF Semi-Finished 半光SG Sight Glass 视镜SH Surface Hard Facing 硬质密封面SK Sketch 草图SMAW Shielded Metal Arc Wel**** 有保护的金属电弧焊SMLS Seamless 无缝SN Swaged Nipple 异径短管SO Slip – On 滑套SOF Slip – On Flange 滑套法兰SPEC * Specification 规定，说明SPL Sound Pressure Lever 升压水准SQ * Square 方的，平方SR Shout Radius 短半径SRE Short Radius Elbow 短半径弯头SS *Stainless Steel 不锈钢ST Steam Trap蒸汽疏水阀STD *Standard 标准STG Small Tongue & Groove 小椎槽面STL *Steel 钢STM Steam 蒸汽Steam Tracing 蒸汽拌热SUCT Suction 吸入口SV Safety Valve 安全泄气阀SW Socket Weld 承插焊SWG Swage 锻造，模锻SWMG Swing Type 旋启式SYM Symmetrical 对称的TT Tee 三通TE Threaded End 螺纹端TEMP *Temperature温度TG Tongue & Groove 椎槽THD *Threaded 螺纹的THK *Thickness 厚度TL Tangent Line 切线TN True North 真实北向TOC Top of Concrete 混凝土北向TOP Top of pipe 管顶TOS Top of Support 支架顶面Top Top of Steel 钢结构顶面TY P Typical 典型的UUB Union Bonnet 带活接头的阀盖UC Union Cap 带活接头的阀帽UN Union 活接头VV Valve 阀VAC Vacuum 真空VAR Variable 可变的VERT Vertical 垂直的VOL *Volume 卷，册，容量，体积WW * West 西WB Weld Branch 焊接支管WC Weld Cap 焊接管帽WD Width 宽度WE Weld End 焊接端WL Wel**** Line 焊接线WN Wel**** Neck 对焊法兰（颈部）WNF Weld Neck Flange 对焊法兰WP Working Pressure 工作压力. Working Point 工作点WT Wall Thickness 壁厚Weight 重量XXH Extra Heavy 加强的，加厚的XXH Double Extra Heavy 双倍加强（厚）的XS Extra Strong 加强的XXS Double Extra Strong 双倍加强的YYP Yield Point 屈服点管件 Fitting弯头 elbow异径弯头 reducing elbow带支座弯头 base elbowk半径弯头 long radius elbow短半径弯头 short radius elbow长半径180°弯头 long radius return短半径180°弯头 short radius return带侧向口的弯头（右向或左向） side outlet elbow (right hand or left hand)双支管弯头（形） double branch elbow三通 tee异径三通 reducing tee等径三通 straight tee带侧向口的三通（右向或左向） side outlet tee (right hand or 1eft hand)异径三通（分支口为异径） reducing tee (reducing on outlet)异径三通（一个直通口为异径） reducing tee (reducing on one run)带支座三通 base tee异径三通（一个直通口及分支口为异径） reducing tee (reducing on one run and outlet)异径三通（两个直通口为异径，双头式） reducing tee (reducing on both runs, bull head)45°斜三通 45° lateral45°斜三通（支管为异径） 45° lateral (reducing on branch)45°斜三通(一个直通口为异径) 45° lateral (reducing on one run)45°斜三通(一个直通口及支管为异径) 45° lateral (reducing on one run and branch)Y型三通（俗称裤衩）true “Y”四通 cross等径四通 straight cross异径四通 reducing cross异径四通（一个分支口为异径 reducing cross (reducing on one outlet)异径四通（一个直通口及分支口为异径） reducing cross (reducing on one run and outlet)异径四通（两个分支口为异径） reducing cross (reducing on both outlet)异径四通（一个直通口及两个分支口为异径）reducing cross (reducing on one run and both outlet)异径管 reducer同心异径管 concentric reducer偏心异径管 eccentric reducer锻制异径管 reducing swage螺纹支管台 threadolet焊接支管台 weldolet承插支管台 sockolet弯头支管台 elbolet斜接支管台 latrolet镶入式支管嘴 sweepolet短管支管台 nipolet支管台，插入式支管台 boss管接头 coupling, full coupling半管接头 half coupling异径管接头 reducing coupling活接头 union内外螺纹缩接（俗称补芯） bushing 管帽 cap (C)堵头 plug短节 nipple异径短节 reducing nipple; swage nipple 弯管 Bend预制弯管 fabricated pipe bend跨越弯管（^ 形） cross-over bend偏置弯管（~ 形） offset bend90°弯管 quarter bend环形弯管 cirele bend单侧偏置90°弯管（形） single offset quarter bend S形弯管“S” bend单侧偏置U形膨胀弯管（| 形）single offset “U” bendU形弯管“U” bend双偏置U膨胀弯管double offset expansion “U” bend斜接弯管 mitre bend三节斜接弯管 3-piece mitre bend折皱弯管 corrugated bend圆度 roundness法兰 Flange (FLG）整体管法兰 integral pipe flange钢管法兰 steel pipe flange螺纹法兰 threaded flange滑套法兰（包括平焊法兰） slip-on flange (SO); slip-on welding flange承插焊法兰 socket welding flange松套法兰 lap joint flange (LJF)对焊法兰 welding neck flange (WNF)法兰盖 blind flange, blind孔板法兰 orifice flange异径法兰 reducing flange盘座式法兰pad type flange松套带颈法兰 loose hubbed flange焊接板式法兰welding plate flange对焊环 welding neck collar （与stub end相似）平焊环 welding-on collar突缘短节 stub end, lap翻边端 lapped pipe end松套板式法兰 loose plate flange压力级 pressure rating, pressure rating class 压力—温度等级 pressure-temperature rating法兰密封面，法兰面 flange facing突面 raised face (RF)凸面 male face (MF)凹面 female face (FMF)榫面 tongue face槽面 groove face环连接面 ring joint face全平面；满平面 flat face; full face (FF)光滑突面 smooth raised face (SRF)法兰面加工 facing finish粗糙度 roughness光滑的 smooth齿形 serrated均方根 root mean square (RMS)算术平均粗糙高度 arithmetical average roughness height (AARH)配对法兰 companion-flange螺栓圆 bolt circle .)垫片 Gasket (GSKT)垫片的型式 type of gasket平垫片 flat gasket环形平垫片 flat ring gasket平金属垫片 flat metal gasket夹棉织物的橡胶 elastomer with cotton fabric insertion夹石棉织物的橡胶 elastomer with asbestos fabric insertion夹石棉织物及金属丝加强的橡胶 elastomer with asbestos fabric insertion and with wire reinforcement无石墨压缩白石棉垫片 non graphited compressed white asbestos gasket天然白橡胶垫片 natural white rubber gasket压缩石棉垫片 compressed asbestos class gasket浸聚四氟乙烯的石棉垫片 PTFE impregnated asbestos gasket夹石棉的缠绕金属垫片 spiral-wound metal gasket with asbestos filler内环 inner ring外环，外定位环 outer ring波纹金属垫片 corrugated metal gasket波纹金属包嵌石棉垫片 corrugated metal gasket with asbestos inserted双夹套波纹金属包石棉垫片 corrugated metal double jacketed asbestos filled gasket双夹套垫片 double jacketed gasket金属包石棉平垫片 flat metal jacketed asbestos filled gasket整体金属齿形垫片 solid metal serrated gasket槽形金属垫片 grooved metal gasket环形连接金属垫片 ring joint metal gasket八角环形垫片 octagonal ring gasket椭圆环形垫片 oval ring gasket透镜式垫片 lens gasket非金属垫片 non-metallic gasketTOE是Threaded One End的缩写，意思是一端螺纹POE是Plain One End的缩写，意思是一端平口TBE是Threaded Both End的缩写，意思是两端螺纹PBE是Plain Both End的缩写，意思是两端平口TOE&POE就是一端平口，另一端螺纹连接TBE是两头都是螺纹连接PBE是两头都是平口（焊接）BBE 两端都是坡口31。

管件中英文对照等径直通 异径直通 内牙直通 外牙直通 equal coup li ngreduci ng coup li ng female coup li ng straight tube with outside 90 等径弯头 90 equalelbow 45 等径弯头 45 equal elbow 外牙弯头 内牙弯头 等径三通 异径三通 内牙三通 外牙三通 管帽cap male elbow female elbow equal tee reduci ng tee female tee male tee sch 代表压力 lr 长半径或1倍半大小SIZE 数量QTY 碳钢弯头 Carbon Steel Elbow 不锈钢弯头 Stainiess Steel Elbow 高压弯头 High-Pressure Elbow 同心异径管 偏心异径管 Concen trie Reducers Ecce ntric Reducers 高压异径管 High-p ressure Reducers 不锈钢等径三通 Stai niess Straight Tee 碳钢等径三通Carbo n Straight Tee 不锈钢等径四通 Stai niess Straight Cross 高压三通 High-pressure Tee 锻制三通Forged Tee 异径接头Temp late 管帽Caps 法兰flange 长径和短径弯头 long and short radius elbows 同心和偏心异径接头 concen tric and ecce ntric reducers 等径和异径三通 straight and reduci ng outlettees 大小头 CONCENTRIC REDUCERTee Equal 等径三通 异径三通 等径四通 90 °短半径弯头 90 °长半径弯头 高压厚壁弯头 U 型管 盲法兰 弯管 翻边 相等的三通 Straight Tee Reduc ing Tee Straight Cross 90°SS Elbow (SR) 90°SS Elbow (LR) Thick ness Elbow Retur n Bend Bla nk Fla nge Bends stub ends异径接头 reducers 公称通径 nominal diameter 外径（mm） outside diameter 中心距至端面的距离 center to end 理论重量（kg/pcs） approx weight description 类种Standard 标准 Design 类型 Material 材质双丝头 Nipple 短节 SWAGE NIPPLE 内外螺纹活接头 Union 螺桩 studHalf-Coupling 单承口管箍 Coupling 双承口管箍盲板 Blind Flange spectacle blind 带双圈的盲板 Ecentric 偏心的拆除 :dismantle 结头（管线的）： tie-in 插盲板： slipspade 盲板： blank 接头： fitting 加热器： heater 金属缠绕垫片（带外环） :SW withoutside ring HR: 热轧 on site: manifold: 管汇1.2管件 Fitting弯头 elbow 异径弯头 reducing elbow 带支座弯头 base elbow k 半径弯头long radius elbow 短半径弯头 short radius elbow 长半径 180°弯头long radius return 短半径 180°弯头 short radius return 带侧向口的弯头（右向或左向）side outlet elbow （right hand orlefthand）双支管弯头（形） double branch elbow 三通 tee 异径三通 reducingtee 等径三通 straight tee 带侧向口的三通（右向或左向）异径三通（分支口为异径）异径三通（一个直通口为异径）带支座三通 base tee 异径三通（一个直通口及分支口为异径）side outlet tee (right hand or1eft hand) reducing tee (reducing onoutlet) reducing tee (reducing on onerun)reducing tee (reducing on one runreducing tee (reducing on both runs,斜三通45 °°lateral 斜三通(支管°为异径) 45 °lateral(reducing on branch) 斜三通( 一个°直通口为异径 ) 45 °lateral (reducing on one run) 斜三通 ( 一个°直通口及支管为异径 )45 °lateral (reducing on one run andstraight crossreducing cross 一个分支口为异径)reducing cross (reducing on oneoutlet) 一个直通口及分支口为异径)reducing cross (reducing on one run两个分支口为异径） reducing cross （reducing on bothoutlet ） 一个直通口及两个分支口为异径） reducing cross （reducing on one runand both outlet ） 异径管 reducer 同心异径管 偏心异径管 锻制异径管螺纹支管台 焊接支管台 承插支管台 弯头支管台 斜接支管台镶入式支管嘴 sweepolet 短管支管台 nipolet 支管台，插入式支管台 boss管接头 coupling, full coupling 半管接头 half coupling 异径管接头 reducingcoupling 活接头 union 内外螺纹缩接（俗称补芯） bushing 管帽 cap （C ） 堵头 plug 短节 nipple 异径短节 reducing nipple; swage nipple 1 管道组成件 Piping component1.1 管子 Pipe 管子（按照配管标准规格制造的 ） pipe 管子 （不按配管标准规格制造的其他用管 ） tube 钢管 steel pipe 铸铁管 cast iron pipe 衬里管 lined pipe andoutlet ） 异径三通（两个直通口为异径，双头式）bull head ） 45 45 45 45 branch ）Y 型三通（俗称裤衩） true 四通 cross 等径四通 异径四通异径四通 异径四通 andoutlet ） 异径四通 异径四通 Y ” concentricreducer eccentricreducer reducingswage threadoletweldoletsockolet elboletlatrolet复合管 clad pipe 碳钢管 carbon steel pipe 合金钢管 alloy steel pipe 不锈钢stainless steel pipe 奥氏体不锈钢管 austenitic stainless steel pipe 铁合金钢管ferritic alloy steel pipe 轧制钢管 wrought-steel pipe 锻铁管 wrought-iron pipe 无缝钢管 seamless （SMLS） steel pipe 焊接钢管 welded steel pipe 电阻焊钢管electric-resistance welded steel pipe 电熔（弧）焊钢板卷管 electric-fusion （arc）-welded steel-plate pipe 螺旋焊接钢管 spiral welded steel pipe 镀锌钢管galvanized steel pipe 热轧无缝钢管 hot-rolling seamless pipe 冷拔无缝钢管 cold-drawing seamless pipe 水煤气钢管 water-gas steel pipe 塑料管 plastic pipe 玻璃管glass tube 橡胶管 rubber tube 直管 run pipe; straight pipe1.2管件 Fitting 弯头 elbow 异径弯头 reducing elbow 带支座弯头 base elbow k 半径弯头 long radius elbow 短半径弯头 short radius elbow 长半径 180°弯头 long radius return 短半径 180°弯头 short radius return 带侧向口的弯头（右向或左向） side outlet elbow （right hand or left hand）双支管弯头（形） double branch elbow 三通 tee 异径三通 reducing tee 等径三通 straight tee 带侧向口的三通（右向或左向）异径三通（分支口为异径）异径三通（一个直通口为异径）带支座三通 base tee 异径三通（一个直通口及分支口为异径）异径三通（两个直通口为异径，双头式） 45°斜三通45 °lateral 45°斜三通（支管为异径） 45 °lateral （reducing on branch） 45°斜三通（一个直通口为异径） 45 °lateral （reducing on one run） 45°斜三通（一个直通口及支管为异径） 45 °lateral （reducing on one run and branch） Y 型三通（俗称裤衩） true “ Y” 四通 cross 等径四通 straight crossside outlet tee （right hand or1eft hand） reducing tee （reducingon outlet） reducing tee （reducingon one run）reducing tee （reducing on one run andoutlet） reducing tee （reducing onboth runs, bull head）reducing cross 一个分支口为异径） reducing cross （reducing on one outlet ） 一个直通口及分支口为异径） reducing cross （reducing on one run and outlet ） 两个分支口为异径） reducing cross （reducing on both outlet ） 一个直通口及两个分支口为异径） reducing cross （reducing on one run and both concentric reducer eccentric reducer reducing swagethreadolet weldolet sockolet elbolet latrolet 镶入式支管嘴 sweepolet 短管支管台 nipolet 支管台 . 插入式支管台 boss 管接头 coupling, full coupling 半管接头 half coupling 异径管接头 reducing coupling 活接头 union 内外螺纹缩接(俗称补芯) bushing 管帽 cap (C) 堵头 plug 短节 nipple 异径短节1.3 弯管 预制弯管 跨越弯管 偏置弯管cirele bend90°弯管（ ? 形） single offset quarter bend“ S ” bend U 形膨胀弯管（ | ?形） single offset“U ” bend “ U ” bend 双偏置 U 膨胀弯管 double offset expansion 斜接弯管mitre bend 三节斜接弯管 3-piece mitre bend 折皱弯管 corrugated bend 圆度 roundness1.4 法兰 Flange (FLG ) 整体管法兰 integral pipe flange 钢管法兰 steel pipe flange 螺纹法兰 threaded flange 滑套法兰(包括平焊法兰) slip-on flange (SO); slip-on welding flange异径四通 异径四通 异径四通 异径四通 异径四通 outlet)异径管 reducer 同心异径管 偏心异径管 锻制异径管 螺纹支管台 焊接支管台 承插支管台弯头支管台 斜接支管台 reducing nipple; swage nipple Bendfabricated pipe bend（A 形） cross-over bend~ 形） offset bend90°弯管 quarterbend 环形弯管 单侧偏置 S 形弯管 单侧偏置 U 形弯管U ” bend承插焊法兰 socket welding flange 松套法兰 lap joint flange (LJF) 对焊法兰 welding neckflange (WNF) 法兰盖 blind flange, blind 孔板法兰 orifice flange 异径法兰 reducing flange 盘座式法兰 pad type flange 松套带颈法兰 loose hubbed flange 焊接板式法兰 welding plate flange 对焊环 welding neck collar (与 stub end 相似) 平焊环 welding-on collar 突缘短节 stub end, lap 翻边端 lapped pipe end 松套板式法兰 loose plate flange 压力级 pressure rating, pressure rating class 压力 — 温度等级 pressure-temperature rating 法兰密封面，法兰面 flange facing 突面 凸面 凹面 榫面 槽面环连接面 ring joint face 全平面 . 满平面 flat face; full face (FF) 光滑突面smooth raised face (SRF) 法兰面加工 facing finish 粗糙度 roughness 光滑的 smooth 齿形 serrated 均方根 root mean square (RMS) 算术平均粗糙高度 arithmetical average roughness height (AARH) 配对法兰 companion-flange 螺栓圆 bolt circle (B.C.)1.5 垫片 Gasket (GSKT) 垫片的型式 type of gasket 平垫片 flat gasket 环形平垫片 flat ring gasket 平金属垫片 flat metal gasket 夹棉织物的橡胶 elastomer withcotton fabric insertion 夹石棉织物的橡胶 elastomer with asbestos fabric insertion 夹石棉织物及金属丝加强的橡胶 elastomer with asbestos fabric insertion and with wirereinforcement 无石墨压缩白石棉垫片 non graphited compressed white asbestos gasket 天然白橡胶垫片 natural white rubber gasket 压缩石棉垫片 compressed asbestos class gasket 浸聚四氟乙烯的石棉垫片 PTFE impregnated asbestos gasket 夹石棉的缠绕金属垫片 spiral-wound metal gasket with asbestos filler raised face (RF) male face (MF) female face (FMF) tongue face groove face内环 inner ring 外环，外定位环 outer ring 波纹金属垫片 corrugated metal gasket 波纹金属包嵌石棉垫片 corrugated metal gasket with asbestos inserted 双夹套波纹金属包石棉垫片 corrugated metal double jacketed asbestos filled gasket 双夹套垫片 double jacketed gasket 金属包石棉平垫片 flat metal jacketed asbestos filled gasket 整体金属齿形垫片 solid metal serrated gasket 槽形金属垫片 grooved metal gasket 环形连接金属垫片 ring joint metal gasket 八角环形垫片 octagonal ring gasket 椭圆环形垫片 oval ring gasket 透镜式垫片 lens gasket 非金属垫片 non-metallic gasket1.6 阀门 Valve1.6.1 阀门结构、零件 阀轭 yoke 外螺纹阀杆及阀轭 outside screw and yoke (OS & Y) 阀杆 stem 内螺纹 inside screw (IS) 阀轭套 yoke sleeve 阀杆环 stem ring 阀座 valve seat (body seat) 阀座环、密封圈 seat ring 整体 堆焊 阀芯 阀盘阀盘密封圈 disc seat 阀体 body 阀盖 bonnet 阀盖衬套 bonnet bush 螺纹阀帽 screw cap 螺纹阀盖 screw bonnet 螺栓连接的阀盖 bolted bonnet (BB) 活接阀盖(帽)螺栓连接的阀帽 bolted cap (BC) 焊接阀盖 welded bonnet (WB) 本体阀杆密封 body stem seal 石棉安全密封 asbestos emenen seal 倒密封 back seal 压力密封的阀盖 pressure-tight bonnet 动力操纵器 电动操纵器 气动操纵器 液压操纵器 快速操纵器阀）座 integral seat阀）座 deposited seat 包括密封圈、杆等内件） trim disc union bonnet (cap)powered operatorelectric motoroperator pneumaticoperator hydraulicoperator quick-acting operator滑动阀杆 sliding stem 正齿轮传动 spur gear operated 伞齿轮传动 bevel gear operated 扳手操作 wrench operatedchain wheel链轮手轮手柄气缸链条操纵的 chain operatedhand wheel hand lever (handle)或液压缸)操纵的 cylinder operated 等径孔道 full bore; full port 异径孔道reducing bore, reduced port,venturi port 短型 short pattern 紧凑型(小型) compact type 笼式环 lantern ring 压盖 gland 阀杆填料 stem packing 阀盖垫片 bonnet gasket 升杆式(明杆) rising stem (RS) 非升杆式(暗杆) non-rising stem (NRS) 指示器 /限位器indicator/stopper 注油器 grease injector 可更换的阀座环 renewable seat ring1.6.2常用阀 (1 )闸阀 gate valve 平行双闸板 double disc parallel seat 开口楔形闸板split wedge 挠性整体楔形闸扳 flexible solid wedge 整体楔形闸板 solid wedge 塞型闸阀 plug gate valve 直通型闸阀 through conduit gate valve(2)截止阀 globe valve 球心型阀盘 globe type disc 塞型阀盘 plug type disc 可转动的阀盘 swivel disc(3)节流闪阀 throttle valve 针阀 needle valve(4)角阀 angle valve(5)Y 型阀( Y 型阀体截止阀) Y-valve (Y-body globe valve)(6)球阀 ball valve 三通球阀 3-way ball valve 装有底轴的 trunnion mounted 耐火型fire safe type 浮动球型 floating ball type 防脱出阀杆 blowout proof stem(7)蝶阀 butterfly valve 对夹式(薄片型) wafer type 凸耳式 lug type偏心阀板蝶阀 offset disc burerfly valve; eccentric butterfly valve 斜阀盘蝶阀 canted disc butterfly valve 连杆式蝶阀 link butterfly valve8) 柱塞阀 piston type valve(9) 旋塞阀 三通旋塞阀 四通旋塞阀 旋塞 cock 衬套旋塞 sleeve cock(10) 隔膜阀 diaphragm valve 橡胶衬里隔膜阀 rubber lined diaphragm valve 直通式隔膜阀 straight way diaphragm valve 堰式隔膜阀 weir diaphragm valve(11) 夹紧式胶管阀 pinch valve (用于泥浆、粉尘等)(12) 止回阀 check valve 升降式止回阀 lift check valve 旋启式止回阀 swing check valve, flap check valve 落球式止回阀 ball check valve 弹簧球式止回阀 spring ball check valve 双板对夹式止回阀 dual plate wafer type check valve 无撞击声止回阀 non-slam cheek valve 底阀 foot valve 切断式止回阀 stop check valve; non-return valve 活塞式止回阀 piston check valve 斜翻盘止回阀 tilting disc check valve 蝶式止回阀 butterfly check valve1.6.3 其它用途的阀 安全泄气阀 安全泄液阀 安全泄压阀 杠杆重锤式 引导阀操纵的安全泄气阀 复式安全泄气阀 twin type safetyvalve 罐底排污阀flush-bottom tank valve 电磁阀 solenoid valve, solenoid operated valve 电动阀 electrically operated valve, electric-motor operated valve 气动阀 pneumaticoperated valve 低温用阀 cryogenic service valve 蒸汽疏水阀 steam trap 机械式疏水阎 mechanical trap 浮桶式疏水阀 open bucket trap, open top bucket trap 浮球式疏水阀 float trap 倒吊桶式疏水阀 inverted bucket trap 自由浮球式疏水阀 loose float trap 恒温式疏水阀 thermostatic trap 金属膨胀式蒸汽疏水阀 metal expansion steam trap 液体膨胀式蒸汽疏水阀 liquid expansion steam trapplug valve three-way plug valvefour-way plugvalvesafety valve (SV) relief valve (RV)safety relief valve lever andweight typepilot operated safety valve双金属膨胀式蒸汽疏水阀 bimetallic expansion steam trap 压力平衡式恒温疏水阀balanced pressure thermostatic trap 热动力式疏水阀 thermodynamic trap 脉冲式蒸汽疏水阀 impulse steam trap 放气阀（自动放气阀） air vent valve （automatic air vent valve ） 平板式滑动闸阀 slab type sliding gate valve 盖阀 flat valve 换向阀 diverting valve, reversing valve 热膨胀阀 thermo expansion valve 自动关闭阀 self-closing gate valve 自动排液阀 self-draining valve 管道盲板阀 line-blind valve 挤压阀 squeeze valve （用于泥浆及粉尘等） 呼吸阀 breather valve 风门、挡板 damper 减压阀 pressure reducing valve, reducing valve 控制阀 control valve 膜式控制阀 diaphragm operated control valve 执行机构 actuator 背压调节阀 back pressure regulating valve 差压调节阀differential pressure regulating valve 压力比例调节阀 pressure ratio regulating valve1.6.4 未指明结构（或阀型）的阀 切断阀 调节阀 快开阀 快闭阀 隔断阀 三通阀 夹套阔 非旋转式阀non-rotary valve 排污阀 blowdown valve 集液排放阀 drip valve 排液阀 放空阀 卸载阀 排出阀 吸入阀sampling valvehand-operated valve; manually operated valve forged valvecast valve（水）龙头 bibb; bib; faucet 抽出液阀（小阀） bleed valve 旁路阀 by-pass valve 软管阀 hose valve 疏水阀用） block valve; shut-off valve;stop valve regulating valve quick opening valvequick closing valve isolating valve three way valve jacketed valvedrain valvevent valveunloading valvedischargevalve suction 多通路阀 multiport valve 取样阀 手动阀 锻造阀 铸造阀混合阀 mixing valve 破真空阀 vacuum breaker 冲洗阀 flush valve 第一道阀；根部阀 primary valve 根部阀 root valve 总管阀 header valve 事故切断阀 emergency valve1.7 管道特殊件 Piping Specialty 1.7.1 管道特殊件(组件) 粗滤器 strainer 过滤器 filter 临时粗滤器 y 型粗滤器 T 型粗滤器 永久过滤器 丝网粗滤器 洗眼器及淋浴器 eye washer and shower 视镜 sight glass 阻火器 flame arrester 喷嘴；喷头 spray nozzle 取样冷却器samplecooler 消声器silencer 膨胀节expansionjoint 波纹膨胀节 bellow expansion joint 单波 single bellow 双波 double bellow 多波 multiple bellow 压力平衡式膨胀节 pressure balanced expansion 带铰链膨胀节 hinged expansion joint 轴向位移型膨胀节 axial movement type expansion joint 自均衡膨胀节(外加强环) self-equalizing expansion joint 带接杆膨胀节 tied expansion joint 万向型膨胀节 universal type expansion joint 球形补偿器 ball type expansion joint 填函式补偿器 slip type (packed type) expansion joint 单向滑动填料函补偿器 single actionpacked slip joint 1.7.2 管道特殊元件 Piping Special Element 软管接头 hose connection (HC) 快速接头 quick coupling 金属软管 metal hose 橡胶管 rubber hose 挠性管 flexible tube 鞍形补强板 reinforcing saddles 补强板 reinforcement pad 特殊法兰 special flange 漏斗 funnel 排液环 drip ring锥型) temporary strainer (cone type) y-type strainer T-typestrainer permanent filter gauze strainer排液漏斗 drain funnel 插板 blank 垫环 spacer8 字盲板 spectacle blind; figure 8 blind 限流孔板 restriction orifice 爆破片rupture disk 法兰盖贴面 protective disc 费托立克接头 victaulic coupling1.8端部连接 End Connection 法兰端 flanged end 坡口端 beveled end (BE) 对焊端butt welded end 平端 plain end (PE) 承插焊端 socket welding end 螺纹端 threaded end (TE) 承口 bell end 焊接端 welding end 法兰连接(接头) flanged joint 对焊连接(接头) butt welded joint 螺纹连接，管螺纹连接 threaded joint, pipe threaded joint 锥管螺纹密封焊连接 seal-welded taper pipe threaded joint 承插焊连接(接头) socket welded joint 承插连接(接头) bell and spigot joint 环垫接头 ring joint (RJ) 万向接头 universal joint 软钎焊连接(接头) soldered joint 搭接接头，松套连接 lappedjoint 外侧厚度切斜角 bevel for outside thickncss 内侧厚度切斜角 bevel for inside thickness 内外侧厚度切斜角 bevel for combined thickness 法兰式的 flanged (FLGD) 对焊的 butt welded (BW) 螺纹的 threaded (THD) 承插焊的 socket welded (SW) 小端为平的 small end plain (SEP) 大端为平的 large end plain (LEP) 两端平 both endsplain (BEP) 小端带螺纹大端带螺纹两端带螺纹一端带螺纹支管连接 branch connection 焊接支管 branch pipe welded directly to the run pipesmall end thread(SET) large endthread (LET) bothend thread (BET)one end thread。