{"id":6419,"date":"2026-10-16T02:05:34","date_gmt":"2026-10-16T02:05:34","guid":{"rendered":"https:\/\/www.henghuahose.com\/?p=6419"},"modified":"2026-10-16T02:06:40","modified_gmt":"2026-10-16T02:06:40","slug":"steam-hose-types-sizes-specifications","status":"publish","type":"post","link":"https:\/\/www.henghuahose.com\/ru\/steam-hose-types-sizes-specifications\/","title":{"rendered":"Steam Hose: Types, Sizes and Specifications \u2013 The Complete Guide"},"content":{"rendered":"<p>If you need steam hose sizes and the type that suits your line, the short answer is 3\/8 inch to 4 inch (10 mm to 102 mm). Every other number on a steam hose label follows from that bore, the steam pressure and the steam temperature. This guide connects the three things buyers ask about most: the ISO 6134 types, the bore and length options, and the working pressure, burst pressure and bend radius that sit on the label.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what-are-the-main-types-of-steam-hose\">What Are the Main Types of Steam Hose?<\/h2>\n\n\n\n<p>Steam hose is not one product. ISO 6134:2024, the fifth edition of the international standard, divides saturated-steam hose into two pressure types and two cover classes, then adds electrical suffixes. Knowing which group a hose belongs to fixes its maximum pressure, its steam temperature and whether it may be used near oil or in a hazardous area.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"type-1-type-2-class-a-class-b-m-and\">Type 1, Type 2, Class A, Class B, M and \u03a9<\/h3>\n\n\n\n<p>The two steam hose types are easy to separate once you look at the reinforcement:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Type 1<\/strong> \u2014 low-pressure construction rated 6 bar (0.6 MPa \/ about 87 psi) at 164 \u00b0C, reinforced with textile. It suits light steam cleaning and short runs.<\/li>\n\n\n\n<li><strong>Type 2<\/strong> \u2014 high-pressure construction rated 18 bar (1.8 MPa \/ about 261 psi) at 210 \u00b0C, reinforced with steel wire braid, spiral or cord. This is the workhorse grade for plant steam.<\/li>\n<\/ul>\n\n\n\n<p>Class A and Class B describe the cover only. Class A is a non-oil-resistant cover, and Class B is an oil-resistant cover. Neither letter says anything about steam capability, so a Class B hose is not automatically the better steam hose. The electrical suffixes matter in hazardous areas: M marks a bonded, electrically continuous hose, while \u03a9 marks a conductive hose that bleeds static charge to earth.<\/p>\n\n\n\n<p>Both steam hose types share the same layer order: a seamless tube, a reinforcement and a pin-pricked cover. What a steam hose is made of walks through each layer. The type, however, decides the pressure and the temperature the assembly may see, so it is the first line to read. In practice, the two steam hose types cover almost every saturated-steam job on a plant.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"steam-hose-sizes-bore-outside-diameter-length-and-bend-radius\">Steam Hose Sizes: Bore, Outside Diameter, Length and Bend Radius<\/h2>\n\n\n\n<p>Steam hose sizes start at 3\/8 inch and stop at 4 inch bore, which is 10 mm to 102 mm. Inside that range the bore sets the steam flow, the outside diameter sets the clearance you need, and the minimum bend radius sets how tightly the hose may be routed. Bulk lengths reach 100 m in the small sizes and fall to 40 m or 20 m in the largest bores.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th scope=\"col\">Bore (in.)<\/th><th scope=\"col\">Inside diameter (mm)<\/th><th scope=\"col\">Outside diameter (mm)<\/th><th scope=\"col\">Min. bend radius (mm)<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">3\/8<\/th><td>10<\/td><td>21<\/td><td>50<\/td><\/tr><tr><th scope=\"row\">1\/2<\/th><td>12<\/td><td>25<\/td><td>60<\/td><\/tr><tr><th scope=\"row\">5\/8<\/th><td>16<\/td><td>28<\/td><td>70<\/td><\/tr><tr><th scope=\"row\">3\/4<\/th><td>19<\/td><td>32<\/td><td>80<\/td><\/tr><tr><th scope=\"row\">1<\/th><td>25<\/td><td>39<\/td><td>110<\/td><\/tr><tr><th scope=\"row\">1-1\/4<\/th><td>32<\/td><td>46<\/td><td>150<\/td><\/tr><tr><th scope=\"row\">1-1\/2<\/th><td>38<\/td><td>54<\/td><td>180<\/td><\/tr><tr><th scope=\"row\">2<\/th><td>51<\/td><td>67<\/td><td>245<\/td><\/tr><tr><th scope=\"row\">2-1\/2<\/th><td>64<\/td><td>83<\/td><td>300<\/td><\/tr><tr><th scope=\"row\">3<\/th><td>76<\/td><td>95<\/td><td>400<\/td><\/tr><tr><th scope=\"row\">3-1\/2<\/th><td>89<\/td><td>110<\/td><td>500<\/td><\/tr><tr><th scope=\"row\">4<\/th><td>102<\/td><td>124<\/td><td>600<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>This steam hose size chart lists the 230 \u00b0C grade, so every steam hose bore in it applies to that grade alone. A steam hose diameter is always taken as the inside diameter at the bore, never measured over the cover. The outside steam hose diameter is what you compare against clamps, guards and reels.<\/p>\n\n\n\n<p>Minimum bend radius is grade-specific. For 3\/4 inch bore, the 230 \u00b0C grade publishes 80 mm while the 170 \u00b0C grade publishes 70 mm. Read the bend radius per grade, because the tube compound and the reinforcement differ between the two. Match the steam hose bore to the steam load first, then confirm that the route can hold the minimum bend radius without kinking.<\/p>\n\n\n\n<p>Because steam hose sizes appear in metric and imperial on the same label, keep one unit as the master. The <a href=\"https:\/\/www.henghuahose.com\/ru\/hose-size-selection-guide\/\" target=\"_blank\" rel=\"noopener\">hose size selection guide<\/a> shows how bore follows steam load, and the <a href=\"https:\/\/www.henghuahose.com\/ru\/convert-mm-to-inches-formula-chart-instant-calculator\/\" target=\"_blank\" rel=\"noopener\">mm to inch conversion chart<\/a> converts a metric quote when a supplier lists millimeters only.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/10\/steam-hose-size-and-rating-chart.jpg\" alt=\"Steam hose size chart showing 3\/8 to 4 inch bore with working pressure, burst pressure and minimum bend radius\" class=\"wp-image-6404\" srcset=\"https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/10\/steam-hose-size-and-rating-chart.jpg 800w, https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/10\/steam-hose-size-and-rating-chart-300x225.jpg 300w, https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/10\/steam-hose-size-and-rating-chart-768x576.jpg 768w, https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/10\/steam-hose-size-and-rating-chart-16x12.jpg 16w, https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/10\/steam-hose-size-and-rating-chart-600x450.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Figure 2. Steam hose size and rating chart: the steam hose diameter, read inside and outside, and the minimum bend radius, all by bore, with the 250 psi (17 bar) working, 2,500 psi (about 172 bar) burst and 10:1 rating that applies to every bore.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"steam-hose-pressure-and-temperature-ratings-explained\">Steam Hose Pressure and Temperature Ratings Explained<\/h2>\n\n\n\n<p>A steam hose pressure rating is the maximum working pressure at a stated steam temperature, not a burst figure. Working pressure and burst pressure are linked by the safety ratio, and for steam service that ratio is 10:1. HENGHUA steam hose uses an ethylene propylene diene monomer (EPDM) tube and is rated 250 psi (17 bar) working pressure with a 2,500 psi (about 172 bar) burst pressure, which is the same 10:1 relationship.<\/p>\n\n\n\n<p>That ratio is far wider than buyers expect from other hose. Hydraulic hose is conventionally rated near 4:1, and pneumatic hose near 3:1. Steam is given 10:1 because a steam failure releases stored energy and scalding vapor at the same moment.<\/p>\n\n\n\n<p>ISO 6134 links each type to a ceiling. Type 1 tops out at 6 bar and 164 \u00b0C. Type 2 tops out at 18 bar and 210 \u00b0C. Type 1 and Type 2 are the only steam hose types defined in the standard. Saturated steam temperature and pressure move together: saturated steam at 10 bar sits at 184 \u00b0C, and at 18 bar it sits at 210 \u00b0C. This is why a steam hose pressure rating must be quoted as a pressure and a temperature pair.<\/p>\n\n\n\n<p>Read every steam hose pressure rating as a pair of numbers. The figure is set at the grade&#8217;s continuous steam temperature, not at ambient, so the pressure a hose carries falls as the steam gets hotter. A pressure with no temperature is not a rating at all. Above the ceiling of each type, the hose leaves the rubber envelope and a different construction is required.<\/p>\n\n\n\n<p><strong>Applicable grade:<\/strong> saturated steam up to 170 \u00b0C takes the 170 \u00b0C grade. At 17 bar, saturated steam sits at roughly 207 \u00b0C, so that duty takes the 230 \u00b0C grade or a non-rubber hose. The 170 \u00b0C grade carries the pressure but not the temperature, which is why the envelope edge is decided by heat rather than by strength.<\/p>\n\n\n\n<p>A high pressure steam hose is defined by its steel wire reinforcement and a higher pressure ceiling, and that is what separates it from a textile Type 1. Every steam hose assembly is proof-tested hydrostatically at 1.5 times working pressure before it leaves the plant. A hydrostatic proof test confirms that the assembly holds, but it does not raise the rating above the published working pressure.<\/p>\n\n\n\n<p>A rating also depends on how the hose is used. A hose that sees continuous steam near the top of its range ages faster than one used intermittently, even at the same pressure and temperature. Two grades can therefore share the same 250 psi (17 bar) working pressure and still suit different duties. Choose the grade by the temperature it must survive continuously, not only by the pressure printed on the line.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"steam-hose-material-options-compared\">Steam Hose Material Options Compared<\/h2>\n\n\n\n<p>The choice of steam hose material decides the temperature ceiling before anything else. Rubber is the standard answer for saturated steam, PTFE-lined hose takes over around 260 \u00b0C, and corrugated metal hose covers the hottest and most aggressive duties.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th scope=\"col\">Steam hose material<\/th><th scope=\"col\">Steam duty<\/th><th scope=\"col\">Reinforcement<\/th><th scope=\"col\">Typical use<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">EPDM rubber (Type 1)<\/th><td>6 bar \/ 164 \u00b0C<\/td><td>Textile<\/td><td>Light cleaning, short runs<\/td><\/tr><tr><th scope=\"row\">EPDM rubber (Type 2)<\/th><td>18 bar \/ 210 \u00b0C<\/td><td>Steel wire braid<\/td><td>Plant steam, lances, reels<\/td><\/tr><tr><th scope=\"row\">EPDM 230 \u00b0C grade<\/th><td>250 psi (17 bar), continuous to 230 \u00b0C<\/td><td>Steel wire braid<\/td><td>Hottest saturated duty<\/td><\/tr><tr><th scope=\"row\">EPDM 170 \u00b0C grade<\/th><td>250 psi (17 bar), continuous to 170 \u00b0C<\/td><td>Steel wire braid<\/td><td>Standard saturated steam<\/td><\/tr><tr><th scope=\"row\">PTFE-lined<\/th><td>About 260 \u00b0C<\/td><td>Stainless braid<\/td><td>Superheated or chemical steam<\/td><\/tr><tr><th scope=\"row\">Corrugated metal<\/th><td>Above the rubber envelope<\/td><td>Metal<\/td><td>Superheated steam, high heat<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>EPDM is the material of choice because it resists hot water and saturated steam better than most general-purpose rubbers. HENGHUA builds two grades: a 230 \u00b0C grade for the hottest continuous duty and a 170 \u00b0C grade for standard saturated steam. Both share a seamless EPDM tube, one or two layers of high-tensile steel wire braid, and a pin-pricked EPDM cover in red or blue.<\/p>\n\n\n\n<p>For the hottest and highest-pressure duty, a high pressure steam hose uses steel wire braid or spiral, and the cover is peroxide-cured and wrapped rather than smooth. Those details support the rating, so a steam hose is never judged by color alone.<\/p>\n\n\n\n<p>Material also sets what the hose must avoid. EPDM is not compatible with mineral oil, diesel or gasoline, so an oily washdown area needs a different rubber. For those media, use a nitrile (NBR\/PVC) or fluoroelastomer (FKM) oil hose instead of a steam hose. A steam hose material that swells in oil will fail long before it reaches its temperature limit.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what-iso-6134-requires-of-a-steam-hose\">What ISO 6134 Requires of a Steam Hose<\/h2>\n\n\n\n<p>ISO 6134:2024 is the fifth edition of the standard, and it replaced ISO 6134:2017. Europe adopts it as EN ISO 6134. The standard covers the saturated steam and the hot water condensate that form in the same line. It also fixes the type, the class, the marking and the safety rules that a compliant steam hose must follow across every bore.<\/p>\n\n\n\n<p>The cover must be pin-pricked, or perforated, evenly around the circumference and along the length. Those small holes vent gas that permeates into the hose layers during service. A pin-pricked cover is a specification, not a defect, and it is often mistaken for damage on a first inspection.<\/p>\n\n\n\n<p>End connections must allow the clamp force to be adjusted, which points to bolted safety clamps rather than a simple clip. The standard prohibits quick-release couplings outright on steam service, because an accidental release under pressure is a serious hazard. That rule applies across all steam hose sizes and both types.<\/p>\n\n\n\n<p>Every hose also carries a marking line that identifies it in the field. It should show the manufacturer, the type, the class, the bore and the maximum working pressure, together with a batch or date code. A hose that cannot be identified cannot be checked against its datasheet, so the marking is part of compliance rather than decoration. Where a store holds two grades side by side, the marking line is the fastest way to confirm that the correct hose reached the job.<\/p>\n\n\n\n<p>The standard also carries two warnings. Superheated steam shortens service life, and closing both ends to form a vacuum can cause popcorning, where the lining separates from the reinforcement. Both are design limits to respect, not conditions to test.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/10\/steam-hose-types-comparison-chart.jpg\" alt=\"Comparison chart of ISO 6134 Type 1 and Type 2 steam hose with textile and steel wire reinforcement\" class=\"wp-image-6405\" srcset=\"https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/10\/steam-hose-types-comparison-chart.jpg 800w, https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/10\/steam-hose-types-comparison-chart-300x225.jpg 300w, https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/10\/steam-hose-types-comparison-chart-768x576.jpg 768w, https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/10\/steam-hose-types-comparison-chart-16x12.jpg 16w, https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/10\/steam-hose-types-comparison-chart-600x450.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Figure 3. ISO 6134 Type 1 and Type 2 steam hose compared: textile versus steel wire reinforcement and their ratings.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"steam-hose-fittings-and-end-connections\">Steam Hose Fittings and End Connections<\/h2>\n\n\n\n<p>Steam hose fittings carry the same rating as the hose, and they are the most common weak point in a line. A bolted safety clamp lets a fitter retighten the joint as the hose relaxes under heat. A quick-release coupling does not, which is why the standard forbids it on steam.<\/p>\n\n\n\n<p>Match the fittings to the bore, the pressure and the thread. Confirm the steam hose bore against the clamp and thread size, because clamp size follows the outside steam hose diameter. NPT and BSP threads do not interchange, and the thread sealant has to suit steam temperature.<\/p>\n\n\n\n<p>The steam hoses and fittings overview treats clamps, adapters and flanges as one system, and the <a href=\"https:\/\/www.henghuahose.com\/ru\/product-category\/industrial-hose\/steam-hose\/\" target=\"_blank\" rel=\"noopener\">steam hose product range<\/a> lists the standard combinations by bore.<\/p>\n\n\n\n<p>Treat the hose and its ends as a single steam hose assembly. A steam hose assembly is only as strong as its weakest part, so an under-rated set of steam hose fittings lowers the whole assembly. Specify the steam hose assembly rating, not just the hose rating, and keep the 10:1 safety ratio intact from end to end.<\/p>\n\n\n\n<p>For a wider look at how different standards treat pressure and end connections, the <a href=\"https:\/\/www.henghuahose.com\/ru\/hydraulic-hose-standards-comparison-guide-sae-vs-din-vs-iso-vs-gb\/\" target=\"_blank\" rel=\"noopener\">hose standards comparison guide<\/a> sets ISO, SAE, DIN and GB side by side.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"how-to-read-a-steam-hose-specification-sheet-in-four-steps\">How to Read a Steam Hose Specification Sheet in Four Steps<\/h2>\n\n\n\n<p>Steam hose sizes, pressures and materials all meet on one line of a specification sheet. Read it in four steps and nothing important is missed.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Step 1: Read the type and class<\/strong> \u2014 Type 1 or Type 2, then Class A or Class B. This gives the pressure and temperature ceiling and the cover behavior.<\/li>\n\n\n\n<li><strong>Step 2: Read the bore and the two diameters<\/strong> \u2014 start with the steam hose bore that carries the steam load, then confirm the inside and outside steam hose diameter and the bend radius for that specific grade.<\/li>\n\n\n\n<li><strong>Step 3: Read the working and burst pressure<\/strong> \u2014 confirm the 10:1 ratio and the temperature at which the working pressure applies.<\/li>\n\n\n\n<li><strong>Step 4: Read the end connection and marking<\/strong> \u2014 bolted safety clamp or a declared crimp, plus type, class, bore and date code.<\/li>\n<\/ul>\n\n\n\n<p>A dedicated walkthrough sits in how to read steam hose specifications. Any sheet that omits the temperature at which the pressure applies is incomplete, so ask for it before you compare prices.<\/p>\n\n\n\n<p>Before you request a quote, gather four details. First, the working pressure and the steam temperature, stated together as one pair. Second, the bore and the total length, including any service loop. Third, the end connection at each end, with the thread standard where a threaded fitting is used. Fourth, whether the duty is continuous or intermittent, because that decides which grade is economic. With those four details, a supplier can quote an assembly that matches the duty instead of a general-purpose substitute that fails early.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"steam-hose-applications-by-industry\">Steam Hose Applications by Industry<\/h2>\n\n\n\n<p>Steam hose duties split by temperature and pressure more than by industry. Light cleaning and short transfer runs sit at the low end, while plant steam at a header sits at the top of the rubber envelope.<\/p>\n\n\n\n<p>A high pressure steam hose such as a Type 2 or the 230 \u00b0C grade serves steam lances, tank heating, vulcanizing presses and concrete curing. A low-pressure steam hose covers light washdown and short runs. Match the grade to the hardest duty the hose will see, never to the average.<\/p>\n\n\n\n<p>In every case the steam hose sizes run from 3\/8 inch to 4 inch bore. The bore follows the steam load and the acceptable pressure drop over the run length, so a long run may need a larger steam hose bore than a short one at the same pressure. Where a high pressure steam hose is used on a reel, confirm the bend radius before the run is planned.<\/p>\n\n\n\n<p>Set the length with a service loop and strain relief at each end. Steam hose stiffens and shortens as it heats, so a run pulled tight when cold will load the coupling once the line is hot. A practical allowance is a little slack over the measured run, plus routing that keeps the hose clear of sharp edges, hot surfaces and traffic routes. Oversizing the bore adds weight and cost; undersizing it wastes header pressure.<\/p>\n\n\n\n<p>For continuous steam, a typical service life is about two to four years, and for intermittent use five to seven years. Those figures assume the hose runs inside its rating and its bend radius, and that it is stored and handled with care.<\/p>\n\n\n\n<p>There is one rule that is not negotiable: replace, never repair. A steam hose with a cut cover, a bulging lining, a stiffened section, a leaking joint or a missing date code must be withdrawn from service and replaced, not patched or re-clamped. No repair restores the tested safety margin, and steam will find any weakened layer on the next cycle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"steam-hose-faqs\">Steam Hose FAQs<\/h2>\n\n\n\n<p><strong>What are the main steam hose types?<\/strong><\/p>\n\n\n\n<p>ISO 6134:2024 defines Type 1 at 6 bar and 164 \u00b0C with textile reinforcement, and Type 2 at 18 bar and 210 \u00b0C with steel wire reinforcement. Class A and Class B then describe the cover, while M and \u03a9 describe electrical continuity. Read the type first, because an oil-resistant cover is not a higher steam rating.<\/p>\n\n\n\n<p><strong>What steam hose sizes are available?<\/strong><\/p>\n\n\n\n<p>Standard steam hose sizes span 3\/8 inch to 4 inch, which is 10 mm to 102 mm inside diameter, and the 230 \u00b0C grade lists twelve stock bores. Smaller bores ship as 100 m reels, and the largest come as 40 m or 20 m lengths. Quote bore and length together, because a small bore on a long run spends header pressure.<\/p>\n\n\n\n<p><strong>How is a steam hose pressure rating set?<\/strong><\/p>\n\n\n\n<p>The steam hose pressure rating is the working pressure at a stated temperature, paired with a burst pressure at a 10:1 safety ratio. HENGHUA hose is rated 250 psi (17 bar) with a 2,500 psi (about 172 bar) burst. Both grades share that 250 psi figure, so the steam temperature decides which one fits.<\/p>\n\n\n\n<p><strong>Which steam hose material handles the hottest steam?<\/strong><\/p>\n\n\n\n<p>EPDM covers saturated steam up to 230 \u00b0C on the hottest grade, and it carries hot condensate better than general-purpose rubber. For superheated steam the rubber envelope is exceeded, so a PTFE-lined hose rated around 260 \u00b0C or a corrugated metal hose is the correct choice. Watch the oil contact: mineral oil needs a different compound.<\/p>\n\n\n\n<p><strong>Do steam hose fittings affect the rating?<\/strong><\/p>\n\n\n\n<p>Yes. Steam hose fittings and clamps set the ceiling for the whole assembly, so they have to be rated with the hose. A bolted safety clamp can be retightened as the hose settles under heat; a quick-release coupling cannot, and the standard prohibits it on steam service.<\/p>\n\n\n\n<p><strong>Why is the cover pin-pricked?<\/strong><\/p>\n\n\n\n<p>A pin-pricked cover vents the gas that works its way into the hose layers under heat. Trapped gas has nowhere to go, so it lifts the cover into blisters along the length. The perforations are required, and a smooth cover is the wrong specification for steam.<\/p>\n\n\n\n<p><strong>I run one steam lance for washdown \u2014 which steam hose type is enough?<\/strong><\/p>\n\n\n\n<p>A Type 1 steam hose at 6 bar and 164 \u00b0C covers a single lance and short washdown runs, and its textile reinforcement keeps the hose light all shift. Move to a high pressure steam hose grade \u2014 a Type 2 or the 230 \u00b0C build \u2014 when the run is long or the duty is continuous.<\/p>\n\n\n\n<p><strong>Which steam hose grade do I need for 17 bar saturated steam?<\/strong><\/p>\n\n\n\n<p>Use the 230 \u00b0C grade for that duty. At 17 bar, saturated steam reaches about 207 \u00b0C, which passes the 170 \u00b0C ceiling even though the pressure stays inside that grade. Where the temperature keeps climbing, a non-rubber hose takes over; check the temperature before the pressure, because heat retires a steam hose early.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"order-steam-hose-to-a-written-specification\">Order Steam Hose to a Written Specification<\/h2>\n\n\n\n<p>HENGHUA manufactures reinforced industrial hose and complete hose assemblies for plants, distributors and OEM brands. Our EPDM steam hose range covers 3\/8 inch to 4 inch bore, rated 250 psi (17 bar) working pressure with a 10:1 burst safety factor.<\/p>\n\n\n\n<p>The construction is a smooth steam-resistant EPDM tube, one or two layers of high-tensile steel wire braid, and a pin-pricked cover that vents permeating gas instead of blistering. Every length is proof-tested at 1.5 times working pressure before it leaves the plant, and each batch is date-coded. Because compounding, extrusion, braiding, vulcanization and crimping all happen in one plant, bulk lead times stay short. Send us the working pressure, the steam temperature, the bore and the end connection, and we will quote against them.<\/p>\n\n\n\n<p>We supply cut lengths, crimped ends, protective sleeves, colour coding and OEM branding. <a href=\"https:\/\/www.henghuahose.com\/ru\/contact\/\" target=\"_blank\" rel=\"noopener\">Get a quote and free samples<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"final-verdict-steam-hose-sizes-ratings-and-the-standard-decide-together\">Final Verdict: Steam Hose Sizes, Ratings and the Standard Decide Together<\/h2>\n\n\n\n<p>Bore alone does not make a safe line. The type, the class, the pressure-and-temperature pair, the material and the end connection decide whether a steam hose survives on the line. Read the whole specification line, not one number, and order a steam hose assembly built to a written specification.<\/p>\n\n\n\n<p>When you are ready, send those four details: working pressure, steam temperature, bore and end connection. Our team quotes steam hose assemblies against those four numbers.<\/p>\n\n\n\n<p><em>Written by the HENGHUA engineering team, with input from plant maintenance and steam-system reliability teams across North America, Europe and South East Asia. HENGHUA manufactures reinforced industrial hose and hose assemblies, including an EPDM steam hose range from 3\/8 inch to 4 inch bore. Those assemblies are rated 250 psi (17 bar) working pressure with a 10:1 burst safety factor, and are supplied as cut lengths or as fully crimped assemblies. Fittings, protective sleeves, colours and OEM branding are available on request. <\/em><\/p>","protected":false},"excerpt":{"rendered":"<p>If you need steam hose sizes and the type that suits your line, the short answer is 3\/8 inch to 4 inch (10 mm to 102 mm). Every other number on a steam hose label follows from that bore, the steam pressure and the steam temperature. This guide connects the three things buyers ask about 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