{"id":6112,"date":"2026-10-09T09:20:44","date_gmt":"2026-10-09T09:20:44","guid":{"rendered":"https:\/\/www.henghuahose.com\/?p=6112"},"modified":"2026-10-09T09:23:53","modified_gmt":"2026-10-09T09:23:53","slug":"xlpe-chemical-suction-discharge-hose","status":"publish","type":"post","link":"https:\/\/www.henghuahose.com\/id\/xlpe-chemical-suction-discharge-hose\/","title":{"rendered":"XLPE Chemical Suction and Discharge Hose 17 bar: Specs and Uses"},"content":{"rendered":"

An XLPE chemical hose is a suction and discharge line built around a cross-linked polyethylene liner. It carries acids, alkalis, and oxidizing media at a quoted working pressure of 17 bar inside its stated temperature band, and it holds its bore under vacuum because a steel helix runs through the wall. If you are reading this specification sheet, this page explains what each line means, which limit binds first, and which duty cycle justifies the build.<\/p>\n\n\n\n

The layer stack is read from the liner outward. The 17 bar class is read against the 10 bar envelope of EN 12115:2021. The steel helix is what allows the line to run on the suction side. The duty cycles below set out where that combination earns its cost.<\/p>\n\n\n\n

About a 15-minute read at 250 words per minute; the page covers construction, the 17 bar class, the steel helix, liner limits, duty cycles, and sizing.<\/em><\/p>\n\n\n\n

What Does Each Line of an XLPE Chemical Hose Specification Mean?<\/h2>\n\n\n\n

A cross-linked polyethylene hose specification sheet is a stack of claims, and each claim should point to a physical layer. Read the sheet from the liner outward, because the liner meets the chemical first. Then read the pressure class, the temperature window, and the electrical grade against the standard that governs them.<\/p>\n\n\n\n

For a chemical suction hose, one claim decides more than the rest. The steel helix is what lets the line be pumped on the inlet side without collapsing. The cover, the textile plies, and the copper wires support that job, but they do not do it alone.<\/p>\n\n\n\n

A chemical discharge hose and a suction line share the same wall until the helix is added. On the 17 bar chemical hose class, the higher rating sits on top of the same layer logic. The reading order does not change, and neither does the way you verify each claim.<\/p>\n\n\n\n

Working pressure and temperature rarely move together on a chemical hose specification sheet. A rating quoted for one temperature band applies inside that band alone. The electrical path forms a second pair with the medium, because a liner that resists a chemical may still build static as the product moves.<\/p>\n\n\n\n

Inside an XLPE Chemical Hose: Layer by Layer<\/h2>\n\n\n\n

This build is a tube within a tube. The inner tube, or liner, is cross-linked polyethylene. It is the only layer that touches the product, so it carries the chemical resistance claim. Everything outside the liner exists to protect it or to carry a mechanical load.<\/p>\n\n\n\n

The construction follows a fixed sequence:<\/p>\n\n\n\n

    \n
  1. A cross-linked polyethylene liner forms the chemical contact surface.<\/li>\n\n\n\n
  2. Plies of synthetic textile cord wrap the liner and take the pressure load.<\/li>\n\n\n\n
  3. A steel helix runs through the wall to resist collapse under vacuum.<\/li>\n\n\n\n
  4. Two crossed anti-static copper wires give static charge a continuous path.<\/li>\n\n\n\n
  5. A white synthetic rubber cover shields the reinforcement from the outside.<\/li>\n<\/ol>\n\n\n\n

    Each of the five layers answers one question. The liner answers what the hose may carry. The textile plies answer how much pressure the wall can take. A pressure rating belongs to this exact stack, and every layer supports it.<\/p>\n\n\n\n

    The helix answers whether the line survives vacuum. The copper wires answer where static charge goes. Once a cover is cut through, moisture and product can reach the textile plies and shorten the life of the whole wall.<\/p>\n\n\n\n

    Each layer also has one defined role on the specification sheet:<\/p>\n\n\n\n

    Table 1. Construction specification sheet for a cross-linked polyethylene suction and discharge hose (planning values; confirm the construction with the maker).<\/p>\n\n\n\n

    Layer<\/th>Material<\/th>Function<\/th><\/tr><\/thead>
    Liner (inner tube)<\/th>Cross-linked polyethylene<\/td>Contacts the chemical and resists acids, alkalis, and oxidizing media<\/td><\/tr>
    Penguatan<\/th>Plies of synthetic textile cord<\/td>Carries the pressure load and limits elongation of the wall<\/td><\/tr>
    Helix<\/th>Steel wire helix<\/td>Resists collapse when the line runs under vacuum<\/td><\/tr>
    Antistatic path<\/th>Two crossed copper wires<\/td>Gives static charge a continuous path to a safe point<\/td><\/tr>
    Cover (outer)<\/th>White synthetic rubber<\/td>Shields the reinforcement from abrasion, weather, and spillage<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    \"Cutaway<\/figure>\n\n\n\n

    Figure 1. Five elements make the wall of a cross-linked polyethylene hose: the XLPE liner, plies of synthetic textile cord, a steel helix, two crossed copper wires, and a white synthetic rubber cover.<\/p>\n\n\n\n

    Why the Steel Helix Matters in an XLPE Chemical Hose<\/h2>\n\n\n\n

    Pressure and vacuum load the wall in opposite directions. Internal pressure pushes the wall outward, and the textile plies resist that push well. Vacuum pulls the wall inward, and textile plies offer little resistance to that pull. A wall built only for pressure folds inward on a suction line.<\/p>\n\n\n\n

    That is why an XLPE chemical hose on the inlet side carries a helix inside the wall. The coil of steel wire holds the bore open while the pump pulls. Without it, the liner collapses, the flow stops, and product is trapped in a flattened tube.<\/p>\n\n\n\n

    The same structural difference decides the hose type. The distinction is the one covered in suction hose vs delivery hose<\/a>, and a chemical suction hose simply adds the XLPE liner and the antistatic path to that same geometry.<\/p>\n\n\n\n

    A helix in a suction wall also shapes how the hose handles. A coiled wall resists the tight bend radius that a bare textile wall would allow, so the routing plan should sit inside the maker’s stated limit. Bending a suction hose tighter than intended can kink the wall and pinch the bore.<\/p>\n\n\n\n

    Duty decides whether the helix is essential:<\/p>\n\n\n\n

    Table 2. How the line position loads the hose wall, and whether a steel helix is needed to keep the bore open.<\/p>\n\n\n\n

    Line position<\/th>Load on the wall<\/th>Helix<\/th>Result<\/th><\/tr><\/thead>
    Discharge side<\/th>Internal pressure pushes outward<\/td>A delivery build is specified<\/td>Textile plies carry the pressure load<\/td><\/tr>
    Suction side<\/th>External pressure pushes inward<\/td>Required<\/td>The helix keeps the bore open<\/td><\/tr>
    Gravity drain<\/th>Low pressure in either direction<\/td>Chosen only for crush protection<\/td>Light duty with low wall stress<\/td><\/tr>
    Mixed suction and discharge<\/th>Direction reverses each cycle<\/td>Required<\/td>Only a suction and discharge build suits it<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    \"Suction<\/figure>\n\n\n\n

    Figure 2. On the suction side the steel helix carries the inward load from the pump, so the liner stays round and the bore stays open.<\/p>\n\n\n\n

    A helix also resists crushing when the hose is walked on, driven over, or pulled across rough ground. That extra stiffness costs a little flexibility, and it is the trade to weigh: accept it where the line sees vacuum, and specify a plain delivery build where it never does.<\/p>\n\n\n\n

    How the 17 bar Class Sits Against EN 12115:2021<\/h2>\n\n\n\n

    EN 12115:2021 sets a service envelope of \u221220 \u00b0C to +65 \u00b0C at a working pressure of 10 bar for rubber and thermoplastic chemical hoses. A 17 bar chemical hose sits above that base envelope. The higher figure therefore rests on the maker’s own test data rather than on the standard envelope alone, so treat it as a quoted class with a stated temperature band.<\/p>\n\n\n\n

    The standard also splits hoses into two types. Type D is a delivery hose built for pressure duty, and Type SD is a suction and delivery hose built for lines that see vacuum. A chemical discharge hose used only under pressure can be Type D, but any line that also draws vacuum needs Type SD.<\/p>\n\n\n\n

    Working pressure and temperature travel together. A hose qualified at a rating inside one temperature band is qualified only inside that band. Above or below that band, the usable pressure falls. Compare the rating at the real wall temperature, not at room temperature.<\/p>\n\n\n\n

    The standard also grades the electrical path. EN 12115:2021 divides hoses into four grades and verifies them with the EN ISO 8031 method. A conductive grade is measured at or below 10\u2076 \u03a9, and an antistatic grade at or below 10\u2079 \u03a9. The two crossed copper wires in this build give the hose a defined path to a safe point.<\/p>\n\n\n\n

    Table 3. The 17 bar class compared with the base EN 12115:2021 envelope (planning values; confirm against the current standard text).<\/p>\n\n\n\n

    Parameter<\/th>EN 12115:2021 envelope<\/th>This 17 bar build<\/th>What it means for the buyer<\/th><\/tr><\/thead>
    Hose type<\/th>Type D delivery and Type SD suction and delivery<\/td>Suction and discharge (Type SD duty)<\/td>Resists vacuum as well as pressure<\/td><\/tr>
    Working pressure<\/th>10 bar<\/td>17 bar quoted class<\/td>A higher class than the base envelope<\/td><\/tr>
    Temperature<\/th>\u221220 \u00b0C to +65 \u00b0C (hose envelope)<\/td>XLPE liner \u221240 \u00b0C to +100 \u00b0C (material window)<\/td>Two different scopes: confirm both<\/td><\/tr>
    Electrical path<\/th>Four grades, tested to EN ISO 8031<\/td>Two crossed copper wires<\/td>Ask for the grade that was tested<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    Temperature and Chemical Limits of an XLPE Chemical Hose<\/h2>\n\n\n\n

    Cross-linked polyethylene has a continuous service window of \u221240 \u00b0C to +100 \u00b0C, and the figure belongs to the liner rather than to the finished assembly. At the cold end that window reaches below the base EN 12115:2021 envelope; at the hot end it stops below the ceiling of EPDM and FKM. Both ends matter, because a process that runs near the top of the band leaves little room for a hot day or a blocked line.<\/p>\n\n\n\n

    The liner is specified for acids, alkalis, and oxidizing media such as hypochlorite. Aromatic solvents attack the polymer even when a general chart looks reassuring, so they fall outside the range of an XLPE chemical hose. For aromatic solvent duty, specify a PTFE liner instead.<\/p>\n\n\n\n

    Cost is the other side of the liner choice, and it is read at the same bore and pressure class. A fluoropolymer liner buys the widest chemical range at the highest material cost; XLPE covers acids, alkalis, and oxidizing media at a lower one. Treat that ranking as relative and confirm it against the current quote for the size you need.<\/p>\n\n\n\n

    Treat the cleaning agent as a chemical duty on the same wall. A liner that carries oxidizing media well may still need a flush between products, so note the cleaning agent, its concentration, and its temperature alongside the process fluid.<\/p>\n\n\n\n

    Table 4. Chemical and thermal limits of a cross-linked polyethylene liner (planning values; confirm against the medium and the maker’s data).<\/p>\n\n\n\n

    Attribute<\/th>XLPE liner<\/th>Note<\/th><\/tr><\/thead>
    Temperature window<\/th>\u221240 \u00b0C to +100 \u00b0C<\/td>Confirm against the maker’s data<\/td><\/tr>
    Acids and alkalis<\/th>Suitable<\/td>Common duty for this liner<\/td><\/tr>
    Oxidizing media<\/th>Suitable<\/td>Includes hypochlorite and similar<\/td><\/tr>
    Aromatic solvents<\/th>Outside the range<\/td>Specify a PTFE liner for this duty<\/td><\/tr>
    Relative cost<\/th>Cost-effective<\/td>Middle position at equal bore and pressure<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    Where an XLPE Chemical Hose Earns Its Place<\/h2>\n\n\n\n

    The build suits duty cycles that pair a vacuum inlet with a pressure outlet. Road tanker unloading, plant pump suction, and tank farm drainage all draw product on one side and push it on the other. A chemical suction hose rated for that duty keeps its bore, and a chemical discharge hose on the same run carries the pressure side without extra parts.<\/p>\n\n\n\n

    A 17 bar chemical hose also appears in smaller duties. Chemical dosing, drum transfer, and IBC transfer use a narrow bore that must survive tight routing without kinking.<\/p>\n\n\n\n

    The common thread across those duty cycles is reversal. Anywhere the same line is asked to pull and to push, the helix and the higher class earn their cost. Where the line only ever pushes, a plain delivery build does the same work with fewer parts.<\/p>\n\n\n\n

    A second group of duties on this XLPE line uses the hose for reach rather than for pressure. Where a fixed pipe cannot follow the load, a flexible suction and discharge line bridges the gap and still takes a vacuum at the start of the transfer. That is the case for tanker unloading and for temporary plant tie-ins.<\/p>\n\n\n\n

    Table 5. Typical duty cycles for a cross-linked polyethylene suction and discharge hose, with the planning bore range that fits each one.<\/p>\n\n\n\n

    Duty cycle<\/th>Typical bore<\/th>Why the build suits it<\/th><\/tr><\/thead>
    Road tanker unloading<\/th>2 in to 4 in<\/td>Vacuum on the inlet and pressure on the discharge<\/td><\/tr>
    Drum and IBC transfer<\/th>1 in to 2 in<\/td>Short runs with frequent coupling changes<\/td><\/tr>
    Plant pump suction<\/th>1-1\/2 in to 3 in<\/td>Continuous negative pressure at the inlet<\/td><\/tr>
    Chemical dosing<\/th>3\/4 in to 1-1\/4 in<\/td>Small bore, tight bends, oxidizing media<\/td><\/tr>
    Tank farm drainage<\/th>2 in to 3 in<\/td>Gravity plus pump-assisted flow<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    What Bore, Fittings, and Installation Does an XLPE Chemical Hose Need?<\/h2>\n\n\n\n

    Bore sizes for this XLPE suction and discharge hose run from 3\/4 in to 4 in as a planning range. Choose the bore from the pump curve and the flow you need, then check it against the hose it replaces. A bore larger than the pump can fill adds weight and leaves product stranded in the line at every shutdown.<\/p>\n\n\n\n

    End fittings on the same hose carry the same chemical at the same pressure, so they deserve the same scrutiny as the tube. Match the fitting alloy to the medium, then decide between a factory crimp and a field clamp before you order. A crimp is permanent and repeatable, while a clamp can be changed but only at the correct torque.<\/p>\n\n\n\n

    Route an XLPE chemical hose along a gentle path. Support it so that its own weight does not hang on the fittings, and keep the lowest point drained where the product can settle. A line that traps chemical between runs adds a cleaning step and a corrosion risk.<\/p>\n\n\n\n

    The selection pages below cover each of those decisions in detail:<\/p>\n\n\n\n