{"id":2547,"date":"2026-10-27T03:46:21","date_gmt":"2026-10-27T03:46:21","guid":{"rendered":"https:\/\/www.sino-alloy.com\/clamp\/product\/epoxy-coated-u-bolt\/"},"modified":"2026-10-27T03:46:21","modified_gmt":"2026-10-27T03:46:21","slug":"epoxy-coated-u-bolt","status":"publish","type":"product","link":"https:\/\/www.sino-alloy.com\/clamp\/product\/epoxy-coated-u-bolt\/","title":{"rendered":"Epoxy-Coated U-Bolt for Corrosive Pipe Supports"},"content":{"rendered":"

An epoxy-coated U-bolt<\/strong> is a formed steel pipe fastener protected by a cured thermoset barrier coating. YOUNGLEE supplies custom round-bend U-bolts with project-selected epoxy powder or liquid coating systems for pipe hold-down, guide, restraint and equipment-mounting duties in water treatment, chemical processing, utility and general industrial service. The coating chemistry, primer or topcoat, film build, surface preparation, curing schedule, thread masking and repair method must be specified as one system; blue, green or another colour alone does not identify performance. Carbon steel, stainless steel and alloy-steel bodies can be produced to an approved drawing or applicable bent-bolt standard, with metric or inch threads and matching hardware.<\/p>\n

Image note: the featured image is a generated representative catalog visual. It shows the general blue-coated shank with uncoated threaded ends, nuts and washers; it does not verify coating chemistry, thickness, approval, corrosion-test result, material grade, dimensions, stock, certification or a completed YOUNGLEE project.<\/em><\/p>\n

Epoxy-Coated U-Bolt at a Glance<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n
Selection Item<\/th>\nTypical YOUNGLEE Supply Basis<\/th>\nInformation for Buyer Confirmation<\/th>\n<\/tr>\n<\/thead>\n
Product type<\/td>\nRound-bend steel U-bolt with coated crown and shanks, matched nuts and washers<\/td>\nGrip, hold-down, guide or equipment-mounting function<\/td>\n<\/tr>\n
Base material<\/td>\nCarbon steel, stainless steel or alloy steel subject to forming and service review<\/td>\nMaterial standard, grade, strength condition, traceability and testing<\/td>\n<\/tr>\n
Epoxy system<\/td>\nFunctional epoxy powder, fusion-bonded epoxy or specified liquid epoxy system where suitable<\/td>\nApproved manufacturer\/system, primer, topcoat, colour, film build and cure<\/td>\n<\/tr>\n
Coverage<\/td>\nCoated crown and non-threaded shanks; threads may be masked where required for assembly<\/td>\nCoating termination, thread allowance, nut finish and permitted exposed areas<\/td>\n<\/tr>\n
Geometry<\/td>\nCustom rod diameter, inside width, leg length, thread length and bend radius<\/td>\nActual pipe OD, support thickness, clearances, tolerances and dimensioned drawing<\/td>\n<\/tr>\n
Inspection<\/td>\nDimensional, visual and thread-fit checks; coating tests as ordered<\/td>\nThickness, adhesion, holiday, cure, corrosion, impact, repair and sampling criteria<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Customization Note:<\/strong> The configurations and technical items above are for selection and quotation reference. Actual dimensions and coating requirements vary with the applicable standard, actual pipe outside diameter, grip or non-grip function, support thickness, installation arrangement, base-steel condition and exposure. YOUNGLEE can manufacture U-bolts to customer drawings, specifications, samples or confirmed installation conditions. Buyers may specify material, rod diameter, thread, inside width, leg length, thread length, bend radius, coating system, coverage, colour, hardware and inspection requirements subject to technical review.<\/p>\n

What Does \u201cEpoxy Coated\u201d Need to Define?<\/h2>\n

Epoxy is a coating chemistry family, not a complete purchase specification. A functional powder applied to a preheated part, an electrostatically sprayed thermoset powder and a two-component liquid epoxy can have different pretreatment, film build, cure, flexibility, chemical resistance, UV behaviour and repair procedures. The U-bolt order should therefore identify the approved product or performance specification rather than relying on colour or the word \u201cepoxy.\u201d<\/p>\n

ASTM D3451-24 is a guide for selecting tests for coating powders and powder coatings. It does not prescribe one universal coating thickness or pass criterion for every U-bolt. ISO 12944-2:2017 can help classify the corrosive environment for protective paint-system selection, but it does not define bent-bolt dimensions or automatically qualify a particular powder system. The coating supplier’s current Technical Data Sheet and the project specification remain essential.<\/p>\n

How Should the Epoxy System Be Selected?<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n
Service Question<\/th>\nWhy It Changes the Coating Choice<\/th>\nInformation for Buyer Confirmation<\/th>\n<\/tr>\n<\/thead>\n
Atmospheric exposure<\/td>\nHumidity, condensation, chlorides, chemicals and time of wetness affect corrosion stress<\/td>\nIndoor, sheltered, coastal, industrial or another defined environment<\/td>\n<\/tr>\n
Water or immersion<\/td>\nContinuous immersion, splash and intermittent wetting require different qualification<\/td>\nFluid, temperature, immersion cycle, water chemistry and required approval<\/td>\n<\/tr>\n
Outdoor sunlight<\/td>\nMany epoxy finishes can chalk or lose gloss under UV even while barrier protection remains<\/td>\nUV exposure, appearance requirement and whether a compatible topcoat is required<\/td>\n<\/tr>\n
Chemical contact<\/td>\nResistance depends on chemical identity, concentration, temperature and exposure duration<\/td>\nChemical list, concentration, continuous or splash exposure and cleaning agents<\/td>\n<\/tr>\n
Mechanical contact<\/td>\nPipe movement, tightening, impact and handling can damage a brittle or poorly supported film<\/td>\nGrip or guide duty, movement, contact pressure, abrasion and handling method<\/td>\n<\/tr>\n
Electrical isolation<\/td>\nA coating may add separation but scratches, holidays, hardware and interfaces control the complete path<\/td>\nRequired dielectric function, test voltage, continuity criteria and insulating accessories<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Customization Note:<\/strong> This table is a selection framework, not a performance guarantee. Final suitability depends on the exact coating grade, substrate, preparation, film build, cure, edge coverage, exposure, damage and acceptance testing. YOUNGLEE can supply a project-selected epoxy system after technical review, but potable-water, dielectric, chemical-resistance or immersion claims require the specified approved coating and applicable evidence.<\/p>\n

Why Surface Preparation and Cure Matter<\/h2>\n

Barrier protection depends on adhesion to a properly prepared substrate. Oil, forming lubricant, mill scale, rust, salts, sharp edges and loose contamination can interrupt the coating film or weaken its bond. Preparation may include cleaning, abrasive blasting or a project-approved conversion treatment. The required cleanliness and surface profile must match the chosen coating manufacturer’s instructions; a value from one system should not be transferred to another.<\/p>\n

Cure must be controlled at the metal temperature, not inferred only from oven air temperature. U-bolt rod diameter, loading pattern and rack contact affect heat-up and film flow. Under-cure can reduce adhesion and chemical resistance, while excessive heat can affect colour, film properties or a heat-sensitive substrate condition. When a base material has controlled mechanical properties or heat-treatment limits, the coating cycle and material certification route must be reviewed together.<\/p>\n

How Are Threads and Coating Coverage Managed?<\/h2>\n

Thick epoxy on external threads can interfere with mating nuts, alter pitch-diameter fit and be damaged during assembly. A common controlled arrangement is to coat the crown and non-threaded shanks while masking the threaded ends. The coating edge should meet the first thread cleanly, without leaving an unnecessary bare unthreaded gap, and the coating should not bridge into the thread unless the complete thread system has been designed and qualified for that build.<\/p>\n

The drawing should define whether nuts and washers are uncoated, zinc-coated, stainless or protected by another compatible system. Exposed threads may need their own corrosion-control plan. Coating only the U-bolt shank does not make mixed-metal hardware immune to galvanic effects, nor does it establish a tightening torque. Finished assemblies should be checked with the actual mating hardware.<\/p>\n

Dimensions Required for Quotation<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n
Dimension or Input<\/th>\nWhy It Matters<\/th>\nInformation for Buyer Confirmation<\/th>\n<\/tr>\n<\/thead>\n
Actual pipe or member OD<\/td>\nControls inside width, bend geometry and installed clearance<\/td>\nState actual OD; NPS or DN alone is not sufficient<\/td>\n<\/tr>\n
Rod diameter and material<\/td>\nAffect threads, bending, section capacity and coating-process limits<\/td>\nMaterial standard, grade, strength condition and corrosion allowance<\/td>\n<\/tr>\n
Inside width and bend radius<\/td>\nEstablish fit around the pipe or structural member<\/td>\nFinished coated dimension, tolerance and measurement datum<\/td>\n<\/tr>\n
Leg length and thread length<\/td>\nAccommodate support thickness, washers, nuts and adjustment<\/td>\nOverall or tangent datum, engagement and final projection<\/td>\n<\/tr>\n
Thread specification<\/td>\nControls mating hardware and inspection gauges<\/td>\nMetric pitch or inch TPI, class, handedness and post-coating fit<\/td>\n<\/tr>\n
Function and loads<\/td>\nDetermine whether contact, clearance, uplift control or restraint is required<\/td>\nGrip, hold-down or guide duty; load directions, movement and tightening method<\/td>\n<\/tr>\n
Coating specification<\/td>\nControls preparation, coverage, cure, thickness, testing and repair<\/td>\nApproved system, colour, exposed threads, topcoat and acceptance criteria<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Customization Note:<\/strong> These are quotation inputs, not a universal stock-size table. Actual dimensions vary with pipe OD, U-bolt function, support thickness, thread engagement, coating build and installation arrangement. YOUNGLEE can manufacture to customer drawings, specifications, samples or confirmed conditions. If dimensions are supplied in inches, YOUNGLEE preserves every decimal place provided and converts to millimetres by multiplying the original inch value by exactly 25.4<\/strong>, without rounding the inch input first.<\/p>\n

Grip, Hold-Down and Guide Functions<\/h2>\n

The blue coating in a drawing or photograph does not define the installed function. A grip U-bolt is tightened into contact according to an engineered procedure. A hold-down arrangement addresses a defined uplift case. A non-grip guide uses planned clearance to limit lateral or upward movement while permitting specified axial travel. The coating must tolerate the selected contact condition, but it cannot replace the support designer’s load, movement and tightening requirements.<\/p>\n

Inspection and Repair Planning<\/h2>\n

Inspection can include finished inside width, leg parallelism, thread gauges, coating appearance, dry-film thickness, adhesion, cure verification and holiday detection where the specification requires it. Edge coverage, rack marks, masked boundaries and the bend crown deserve attention because geometry can affect film build. Acceptance limits and sampling must be agreed before production.<\/p>\n

ISO 9227:2022 defines salt-spray test procedures but does not set the exposure duration or interpretation for a particular U-bolt. Any corrosion test must identify the exact coating system, specimen preparation, scribe condition, duration and pass criteria. Salt-spray hours should not be presented as a direct prediction of years in service. The repair material and procedure must also be compatible with the original system; touching up a damaged area with an unspecified blue paint is not controlled repair.<\/p>\n

Epoxy Compared with Other U-Bolt Finishes<\/h2>\n

Epoxy is primarily a barrier system. Zinc electroplate, zinc-nickel, hot-dip galvanizing and zinc-flake finishes use different metallic or composite protection mechanisms, coating builds and thread practices. PTFE and other fluoropolymer systems may be selected for different friction or chemical requirements. The correct choice depends on the environment, geometry, handling, movement and inspection plan rather than colour or a generic \u201ccorrosion resistant\u201d label.<\/p>\n

For a non-electrolytic metallic-flake route, review the zinc-flake coated U-bolt<\/a>. For a fluoropolymer option, compare the PTFE-coated U-bolt pipe clamp<\/a>. Where an electrodeposited alloy finish is specified, the zinc-nickel plated U-bolt<\/a> explains separate process and thread-control considerations.<\/p>\n

Typical Applications<\/h2>\n
    \n
  • water and wastewater pipe supports where the exact coating and approval basis are specified;<\/li>\n
  • chemical-processing and utility supports with defined splash, washdown or atmospheric exposure;<\/li>\n
  • industrial pipe guides and hold-downs requiring a non-metallic barrier on the U-bolt shank;<\/li>\n
  • equipment and structural mounting where colour identification is secondary to a controlled coating system;<\/li>\n
  • custom pipe-support assemblies combining coated U-bolts with compatible pads, plates or insulated interfaces.<\/li>\n<\/ul>\n

    Continuous immersion, potable-water contact, marine splash, high temperature, fire exposure, electrical isolation and fatigue-critical service require project-specific qualification. Epoxy should not be assumed suitable merely because a similarly coloured product performed in another environment.<\/p>\n

    Frequently Asked Questions<\/h2>\n

    Is every blue U-bolt epoxy coated?<\/h3>\n

    No. Colour cannot identify resin chemistry, film build, cure or performance. Specify the coating system and acceptance requirements.<\/p>\n

    Should the threads be epoxy coated?<\/h3>\n

    Not automatically. Masking the threads often protects fit, while exposed threads receive a separately specified finish. If threads are to be coated, coating allowance, nut fit and assembly testing must be defined.<\/p>\n

    Can an epoxy-coated U-bolt be used outdoors?<\/h3>\n

    Only after reviewing the exact system. Some epoxies chalk or lose gloss under UV and may require a compatible weathering topcoat, even when their barrier properties remain useful.<\/p>\n

    Does epoxy coating provide certified electrical isolation?<\/h3>\n

    Not by itself. Dielectric performance depends on coating grade, thickness, holidays, damage, hardware and the complete installed path. State the required test method and acceptance criteria.<\/p>\n

    What should be sent with an RFQ?<\/h3>\n

    Provide actual pipe OD, rod material and diameter, thread, inside width, leg length, thread length, bend radius, nuts and washers, grip or guide function, loads, movement, coating product or specification, coverage, thickness, colour, exposure, testing, repair, quantity, drawing and documentation requirements.<\/p>\n

    Request a Quotation<\/h2>\n

    Send YOUNGLEE the approved drawing or complete dimensional schedule together with the base-material specification, epoxy system, coating coverage, mating hardware, installed function, environment and acceptance requirements. YOUNGLEE will review forming, thread masking, preparation, cure, inspection, repair and packaging before confirming a custom epoxy-coated U-bolt for production.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Custom epoxy-coated U-bolts with controlled surface preparation, cure, coverage and thread masking for corrosive pipe-support service. Made to drawing with project-selected coating systems.<\/p>\n","protected":false},"featured_media":2546,"template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_cat":[85],"product_tag":[],"_links":{"self":[{"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/product\/2547"}],"collection":[{"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/media\/2546"}],"wp:attachment":[{"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/media?parent=2547"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/product_cat?post=2547"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/product_tag?post=2547"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}