{"id":4773,"date":"2026-09-16T08:13:58","date_gmt":"2026-09-16T08:13:58","guid":{"rendered":"https:\/\/www.henghuahose.com\/?post_type=product&p=4773"},"modified":"2026-09-16T09:32:23","modified_gmt":"2026-09-16T09:32:23","slug":"butt-weld-tube-metric-female-o-ring-adapter-2we","status":"publish","type":"product","link":"https:\/\/www.henghuahose.com\/pt\/product\/butt-weld-tube-metric-female-o-ring-adapter-2we\/","title":{"rendered":"Butt Weld Tube to Metric Female O-Ring Adapter 2WE"},"content":{"rendered":"
\"Butt-weld<\/figure>\r\n

 <\/p>\r\n\r\n\r\n\r\n\r\n\r\n

Why This Butt Weld Tube to Metric Female O-Ring Adapter 2WE Passes the Compliance Gate<\/h2>\r\n\r\n\r\n\r\n

The butt weld tube to metric female O-ring adapter 2WE<\/strong> terminates a welded steel tube run in a metric female O-ring face seal port, so a male stud end can be threaded straight into the end of the line. The tube side is a plain weld preparation that is butt welded to the tube, and the female end holds an O-ring in a groove in its face, which is compressed against the flat face of the mating male stud end. There is no thread sealant anywhere in the joint.<\/p>\r\n\r\n\r\n\r\n

Eleven codes pair tube outside diameters from 6 mm to 38 mm with female threads from M12X1.25 to M45X2. The order code reads tube first and thread second, which is the opposite of the male weld series, so check the order of the two size blocks before you order.<\/p>\r\n\r\n\r\n\r\n

Core Advantages<\/h3>\r\n\r\n\r\n\r\n
    \r\n
  1. Welded tube line with a female port at the end<\/strong> – on this butt weld tube to metric female O-ring adapter 2WE a tube run can accept a male stud end without an intermediate nipple.<\/li>\r\n
  2. Eleven codes from 6 mm to 38 mm tube<\/strong> – female threads from M12X1.25 up to M45X2 for the metric sizes used on mobile and industrial equipment.<\/li>\r\n
  3. O-ring face seal at the female end<\/strong> – the O-ring sits in a groove in the female face and seals against the mating stud face, so no tape or sealant is used.<\/li>\r\n
  4. One fewer threaded joint in the circuit<\/strong> – welding the tube to the adapter removes a threaded connection, which is the usual source of weeping on vibrating machines.<\/li>\r\n
  5. Carbon steel with plated finish<\/strong> – bodies are machined from carbon steel and supplied with a protective plated finish as standard practice.<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n

    Technical Specifications<\/h2>\r\n\r\n\r\n\r\n

    What Is a Butt Weld Tube to Metric Female O-Ring Adapter?<\/h3>\r\n\r\n\r\n\r\n

    The butt weld tube to metric female O-ring adapter 2WE is a straight fitting whose first end is a plain weld preparation that is butt welded to a hydraulic tube, and whose second end is a metric female thread with an O-ring groove machined in its face. The O-ring is compressed between the face of this adapter and the flat face of the mating male stud end.<\/p>\r\n\r\n\r\n\r\n

    The butt weld tube to metric female O-ring adapter 2WE is not a female-to-female coupler and it is not a cone seat fitting. The female end must be matched to a male stud end of the same thread and the same sealing system, and the weld end must be matched to the tube outside diameter in the matrix.<\/p>\r\n\r\n\r\n\r\n

    Connection 1 – Tube Side W: Butt Weld Tube End<\/h3>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
    Item<\/th>\r\nDetalhe<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
    Interface type<\/td>\r\nButt-weld tube end, plain preparation<\/td>\r\n<\/tr>\r\n
    Joining method<\/td>\r\nFull-penetration butt weld to a steel hydraulic tube<\/td>\r\n<\/tr>\r\n
    Tube outside diameter<\/td>\r\n6 mm to 38 mm, one diameter per size code<\/td>\r\n<\/tr>\r\n
    Weld end diameter<\/td>\r\nShown as dimension D in the matrix and matched to the tube outside diameter<\/td>\r\n<\/tr>\r\n
    Reference standard<\/td>\r\nMetric hydraulic tube outside diameter series; weld to your qualified welding procedure<\/td>\r\n<\/tr>\r\n
    Tube wall and grade<\/td>\r\nSelected by the user to suit the working pressure and the circuit<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n\r\n\r\n\r\n

    Connection 2 – Port Side E: Metric Female O-Ring Face Seal End<\/h3>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
    Item<\/th>\r\nDetalhe<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
    Interface type<\/td>\r\nMetric female thread with an O-ring groove in the face<\/td>\r\n<\/tr>\r\n
    M\u00e9todo de veda\u00e7\u00e3o<\/td>\r\nO-ring compressed between the adapter face and the flat face of the mating male stud end<\/td>\r\n<\/tr>\r\n
    Thread form<\/td>\r\nMetric fine pitch, size-specific (for example M12X1.25, M22X1.5, M45X2)<\/td>\r\n<\/tr>\r\n
    Reference standard<\/td>\r\nMetric O-ring face seal system, ISO 6149 thread series<\/td>\r\n<\/tr>\r\n
    Size range<\/td>\r\nM12X1.25 to M45X2<\/td>\r\n<\/tr>\r\n
    O-ring size<\/td>\r\nNot tabulated for this series; specified to match the mating stud standard<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n\r\n\r\n\r\n

    This series is not supplied with a tabulated O-ring size, unlike the male stud series. Give us the mating stud standard when ordering and the seal will be confirmed to match it, or order the seal separately to your own port standard.<\/p>\r\n\r\n\r\n\r\n

    Dimensional Data<\/h3>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
    Symbol<\/th>\r\nSignificado<\/th>\r\nUnit<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
    PART NO.<\/td>\r\nCatalogue order code in the form 2WE-tube-thread<\/td>\r\n–<\/td>\r\n<\/tr>\r\n
    THREAD E<\/td>\r\nMetric female thread at the port end<\/td>\r\nmm pitch notation<\/td>\r\n<\/tr>\r\n
    TUBE O.D.<\/td>\r\nNominal outside diameter of the tube for that code<\/td>\r\nmm<\/td>\r\n<\/tr>\r\n
    A<\/td>\r\nFemale end length, measured from the female face to the shoulder<\/td>\r\nmm<\/td>\r\n<\/tr>\r\n
    D<\/td>\r\nWeld end diameter, matched to the tube outside diameter<\/td>\r\nmm<\/td>\r\n<\/tr>\r\n
    S<\/td>\r\nHex across flats of the body, the wrench size<\/td>\r\nmm<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n\r\n\r\n\r\n

    Full Dimension Table (Part Number Matrix)<\/h3>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
    PART NO.<\/th>\r\nTHREAD E<\/th>\r\nTUBE O.D. (mm)<\/th>\r\nA (mm)<\/th>\r\nD (mm)<\/th>\r\nS (mm)<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
    2WE-06-12<\/td>\r\nM12X1.25<\/td>\r\n6<\/td>\r\n8<\/td>\r\n6<\/td>\r\n14<\/td>\r\n<\/tr>\r\n
    2WE-08-14<\/td>\r\nM14X1.5<\/td>\r\n8<\/td>\r\n8.5<\/td>\r\n8<\/td>\r\n17<\/td>\r\n<\/tr>\r\n
    2WE-10-16<\/td>\r\nM16X1.5<\/td>\r\n10<\/td>\r\n8.5<\/td>\r\n10<\/td>\r\n19<\/td>\r\n<\/tr>\r\n
    2WE-12-18<\/td>\r\nM18X1.5<\/td>\r\n12<\/td>\r\n8.5<\/td>\r\n12<\/td>\r\n22<\/td>\r\n<\/tr>\r\n
    2WE-14-22<\/td>\r\nM22X1.5<\/td>\r\n14<\/td>\r\n10<\/td>\r\n14<\/td>\r\n27<\/td>\r\n<\/tr>\r\n
    2WE-18-27<\/td>\r\nM27X1.5<\/td>\r\n18<\/td>\r\n10<\/td>\r\n18<\/td>\r\n32<\/td>\r\n<\/tr>\r\n
    2WE-22-30<\/td>\r\nM30X1.5<\/td>\r\n22<\/td>\r\n11<\/td>\r\n22<\/td>\r\n36<\/td>\r\n<\/tr>\r\n
    2WE-28-36<\/td>\r\nM36X2<\/td>\r\n28<\/td>\r\n13<\/td>\r\n28<\/td>\r\n41<\/td>\r\n<\/tr>\r\n
    2WE-30-39<\/td>\r\nM39X2<\/td>\r\n30<\/td>\r\n13<\/td>\r\n30<\/td>\r\n46<\/td>\r\n<\/tr>\r\n
    2WE-34-42<\/td>\r\nM42X2<\/td>\r\n34<\/td>\r\n15<\/td>\r\n34<\/td>\r\n50<\/td>\r\n<\/tr>\r\n
    2WE-38-52<\/td>\r\nM45X2<\/td>\r\n38<\/td>\r\n15<\/td>\r\n38<\/td>\r\n55<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n\r\n\r\n\r\n

    All dimensions are in millimetres and are transcribed from the published spec sheet for this series. The letter X in a thread callout is the pitch separator, so M12X1.25 means a 12 mm nominal metric thread with a 1.25 mm pitch. For every code the weld end diameter D matches the tube outside diameter printed for that code.<\/p>\r\n\r\n\r\n\r\n

    Note the last line of the matrix: code 2WE-38-52 is listed with an M45X2 female thread, so the second block of that one code does not read as the thread nominal size. Confirm the thread on your enquiry, and we will state the exact thread in the quotation.<\/p>\r\n\r\n\r\n\r\n

    Thread Size and Dash Chart<\/h3>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
    Size code<\/th>\r\nTUBE O.D. (mm)<\/th>\r\nTHREAD E<\/th>\r\nHex S (mm)<\/th>\r\nTypical mating stud end<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
    2WE-06-12<\/td>\r\n6<\/td>\r\nM12X1.25<\/td>\r\n14<\/td>\r\nMetric male O-ring stud end, M12X1.25<\/td>\r\n<\/tr>\r\n
    2WE-08-14<\/td>\r\n8<\/td>\r\nM14X1.5<\/td>\r\n17<\/td>\r\nMetric male O-ring stud end, M14X1.5<\/td>\r\n<\/tr>\r\n
    2WE-10-16<\/td>\r\n10<\/td>\r\nM16X1.5<\/td>\r\n19<\/td>\r\nMetric male O-ring stud end, M16X1.5<\/td>\r\n<\/tr>\r\n
    2WE-12-18<\/td>\r\n12<\/td>\r\nM18X1.5<\/td>\r\n22<\/td>\r\nMetric male O-ring stud end, M18X1.5<\/td>\r\n<\/tr>\r\n
    2WE-14-22<\/td>\r\n14<\/td>\r\nM22X1.5<\/td>\r\n27<\/td>\r\nMetric male O-ring stud end, M22X1.5<\/td>\r\n<\/tr>\r\n
    2WE-18-27<\/td>\r\n18<\/td>\r\nM27X1.5<\/td>\r\n32<\/td>\r\nMetric male O-ring stud end, M27X1.5<\/td>\r\n<\/tr>\r\n
    2WE-22-30<\/td>\r\n22<\/td>\r\nM30X1.5<\/td>\r\n36<\/td>\r\nMetric male O-ring stud end, M30X1.5<\/td>\r\n<\/tr>\r\n
    2WE-28-36<\/td>\r\n28<\/td>\r\nM36X2<\/td>\r\n41<\/td>\r\nMetric male O-ring stud end, M36X2<\/td>\r\n<\/tr>\r\n
    2WE-30-39<\/td>\r\n30<\/td>\r\nM39X2<\/td>\r\n46<\/td>\r\nMetric male O-ring stud end, M39X2<\/td>\r\n<\/tr>\r\n
    2WE-34-42<\/td>\r\n34<\/td>\r\nM42X2<\/td>\r\n50<\/td>\r\nMetric male O-ring stud end, M42X2<\/td>\r\n<\/tr>\r\n
    2WE-38-52<\/td>\r\n38<\/td>\r\nM45X2<\/td>\r\n55<\/td>\r\nMetric male O-ring stud end, M45X2<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n\r\n\r\n\r\n

    Material and Heat Treatment<\/h3>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
    Item<\/th>\r\nTypical supply<\/th>\r\nNote<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
    Body material<\/td>\r\nCarbon steel, machined from bar or forged blank<\/td>\r\nStainless steel 304 \/ 316L on request<\/td>\r\n<\/tr>\r\n
    Weld end condition<\/td>\r\nMachined plain end for butt welding<\/td>\r\nPlating condition of the weld zone to be confirmed on the drawing<\/td>\r\n<\/tr>\r\n
    Heat treatment<\/td>\r\nApplied where the size and duty require it<\/td>\r\nTypical practice, confirmed on the drawing<\/td>\r\n<\/tr>\r\n
    Surface finish<\/td>\r\nZinc plating, trivalent passivation<\/td>\r\nZinc-nickel or other systems on request<\/td>\r\n<\/tr>\r\n
    O-ring material<\/td>\r\nNBR as standard practice where a seal is supplied<\/td>\r\nFKM and other elastomers on request<\/td>\r\n<\/tr>\r\n
    Documentation<\/td>\r\nBatch label with heat number; material test report on request<\/td>\r\nThird-party inspection such as BV or SGS can be arranged<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n\r\n\r\n\r\n

    These values describe standard practice for this series rather than a customer-specific qualification. Plating next to a weld preparation can affect weld quality, so tell us if the weld zone must be supplied unplated or masked.<\/p>\r\n\r\n\r\n\r\n

    Working Pressure and Operating Envelope<\/h3>\r\n\r\n\r\n\r\n

    This series is supplied without a single published pressure rating, because the working pressure is governed by the port standard together with the tube or hose grade selected, and the finished assembly is only as strong as its weakest member. On a welded adapter the tube wall and the weld itself are usually the deciding factors.<\/p>\r\n\r\n\r\n\r\n

    Pressure data for the butt weld tube to metric female O-ring adapter 2WE can be issued against ISO or SAE requirements on request. State the tube size, wall thickness and grade when ordering.<\/p>\r\n\r\n\r\n\r\n

    Temperature Range<\/h3>\r\n\r\n\r\n\r\n

    Continuous service temperature is typically -40 \u00b0C to +120 \u00b0C for a nitrile O-ring in a steel body, and it is set by the sealing element and by the tube or hose in the circuit. Higher temperature service calls for a fluorocarbon elastomer, available on request.<\/p>\r\n\r\n\r\n\r\n

    How to Read the Part Number Matrix<\/h2>\r\n\r\n\r\n\r\n

    The order code has three blocks: the series prefix, the tube diameter, and the female thread size.<\/p>\r\n\r\n\r\n\r\n

    The prefix 2WE means that the first end is a butt-weld tube end and the second end is a metric female O-ring face seal end. The tube block is written first and the thread block second, which is the reverse of the male weld series; reading the blocks in the wrong order will select the wrong part.<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
    Order code<\/th>\r\nPrefix meaning<\/th>\r\nSize blocks<\/th>\r\nFull interface<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
    2WE-06-12<\/td>\r\n2WE: butt-weld tube end to metric female O-ring end<\/td>\r\nTube 6 mm, thread 12 (M12X1.25)<\/td>\r\n6 mm tube weld end to M12X1.25 female end<\/td>\r\n<\/tr>\r\n
    2WE-18-27<\/td>\r\n2WE: butt-weld tube end to metric female O-ring end<\/td>\r\nTube 18 mm, thread 27 (M27X1.5)<\/td>\r\n18 mm tube weld end to M27X1.5 female end<\/td>\r\n<\/tr>\r\n
    2WE-38-52<\/td>\r\n2WE: butt-weld tube end to metric female O-ring end<\/td>\r\nTube 38 mm, thread listed as M45X2<\/td>\r\n38 mm tube weld end to M45X2 female end<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n\r\n\r\n\r\n

    Two warnings are worth repeating. The first block is a tube diameter and the second is a thread size, so the two are never the same number by accident. On the largest code the printed thread does not follow the same numbering pattern as the rest of the series, so quote the thread explicitly.<\/p>\r\n\r\n\r\n\r\n

    Selection and Ordering<\/h2>\r\n\r\n\r\n\r\n

    Selection Checklist \/ Decision Table<\/h3>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
    Question<\/th>\r\nWhat to check<\/th>\r\nExample<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
    What is the tube size?<\/td>\r\nMeasure the tube outside diameter, not the bore<\/td>\r\n18 mm tube O.D.<\/td>\r\n<\/tr>\r\n
    What male stud end will screw into it?<\/td>\r\nThread, pitch and sealing system of the mating stud<\/td>\r\nMetric male O-ring stud, M27X1.5<\/td>\r\n<\/tr>\r\n
    Which O-ring is needed?<\/td>\r\nMatch the seal to the mating stud standard<\/td>\r\nConfirmed at quotation<\/td>\r\n<\/tr>\r\n
    What tube material and wall?<\/td>\r\nGrade and wall to suit the pressure and the weld procedure<\/td>\r\nSeamless steel tube, wall per duty<\/td>\r\n<\/tr>\r\n
    Is plating acceptable at the weld zone?<\/td>\r\nPlating can affect weld quality<\/td>\r\nRequest unplated or masked weld zone<\/td>\r\n<\/tr>\r\n
    Is there room for the hex?<\/td>\r\nCompare S against the machine layout<\/td>\r\nS = 32 mm for 2WE-18-27<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n\r\n\r\n\r\n

    Cross Reference Service<\/h3>\r\n\r\n\r\n\r\n

    Send a photograph of the worn fitting, a rubbing of the female thread, or the old order code from your own system, and the size of this butt weld tube to metric female O-ring adapter 2WE will be converted free of charge. Measure both the tube outside diameter and the female thread, and state which male stud end has to fit. We quote and supply under the HENGHUA and Globhose brands only; we do not copy or re-brand another manufacturer’s product, and we do not print another company’s part number on any component.<\/p>\r\n\r\n\r\n\r\n

    Packaging and Logistics<\/h3>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
    Item<\/th>\r\nStandard practice<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
    Unit protection<\/td>\r\nThread protectors and anti-corrosion film on machined surfaces<\/td>\r\n<\/tr>\r\n
    Carton<\/td>\r\nInner bag plus export carton, size-coded labels<\/td>\r\n<\/tr>\r\n
    Batch label<\/td>\r\nSeries, size code, quantity, heat number, production date<\/td>\r\n<\/tr>\r\n
    Mixed loads<\/td>\r\nDifferent sizes can be combined in one consignment to reach a full container<\/td>\r\n<\/tr>\r\n
    Urgent orders<\/td>\r\nAir freight for samples and breakdown spares<\/td>\r\n<\/tr>\r\n
    Standard lead time<\/td>\r\nBatch delivery of standard sizes in around seven days, subject to confirmation<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n\r\n\r\n\r\n

    Installation and Fitment Guide<\/h2>\r\n\r\n\r\n\r\n

    Step-by-Step Assembly<\/h3>\r\n\r\n\r\n\r\n
      \r\n
    1. Confirm the female thread and pitch, and check that the mating male stud end uses the same O-ring face seal system.<\/li>\r\n
    2. Measure the tube outside diameter and confirm it matches the code and dimension D.<\/li>\r\n
    3. Cut the tube square, deburr it inside and out, and check the end for ovality.<\/li>\r\n
    4. Remove the O-ring from the female face before welding, or shield it from heat, so that the elastomer is not damaged.<\/li>\r\n
    5. Tack, align and complete the butt weld to your qualified welding procedure, and let the part cool naturally.<\/li>\r\n
    6. Clean the weld, fit a new O-ring in the face groove, screw the male stud end in by hand, and tighten to the standard torque.<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n

      Torque and Sealing Notes<\/h3>\r\n\r\n\r\n\r\n

      Tightening torque at the female end is taken from the applicable standard data table for the thread size. The O-ring needs only enough compression to seat the two faces together, so excessive torque adds nothing except stress on the thread.<\/p>\r\n\r\n\r\n\r\n

      Welding heat is the main risk to this part. Zinc plating and any residual oil or paint in the weld zone can contaminate the weld, and an O-ring left in the face groove during welding will be destroyed. Never use thread tape or liquid sealant on the female end.<\/p>\r\n\r\n\r\n\r\n

      Installation Warnings<\/h3>\r\n\r\n\r\n\r\n