{"id":2536,"date":"2026-10-20T03:38:27","date_gmt":"2026-10-20T03:38:27","guid":{"rendered":"https:\/\/www.sino-alloy.com\/clamp\/product\/pipe-covering-protection-saddle\/"},"modified":"2026-10-20T03:38:27","modified_gmt":"2026-10-20T03:38:27","slug":"pipe-covering-protection-saddle","status":"publish","type":"product","link":"https:\/\/www.sino-alloy.com\/clamp\/product\/pipe-covering-protection-saddle\/","title":{"rendered":"MSS Type 39 Pipe Covering Protection Saddle"},"content":{"rendered":"

An MSS Type 39 pipe covering protection saddle<\/strong> is a heavy formed-steel support component used beneath insulated high-temperature piping. Unlike a thin insulation shield, the saddle has a stiff curved shell and welded ribs that transfer the pipe reaction toward a roller, hanger, or structural support while leaving space for insulation around the pipe. YOUNGLEE supplies drawing-controlled carbon-steel or stainless-steel protection saddles for steam, power, process, and utility piping. The saddle arc, rib arrangement, insulation depth, plate thickness, material, finish, and support interface are selected from the actual pipe outside diameter, insulation thickness, loads, temperature, movement, and project standard. Custom dimensions and configurations are available after technical review.<\/p>\n

Image note: the featured image is a generated representative cutaway of a large-pipe protection saddle on a roller support. It explains the general load path only; it does not verify a project dimension, material grade, load rating, insulation system, test, certification, or previous supply.<\/em><\/p>\n

Pipe Covering Protection Saddle at a Glance<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n
Selection item<\/th>\nTypical custom supply basis<\/th>\nInformation for Buyer Confirmation<\/th>\n<\/tr>\n<\/thead>\n
Product type<\/td>\nHeavy formed steel pipe covering protection saddle; MSS SP-58 Type 39 basis where specified<\/td>\nRequired type, governing standard edition, approved support drawing, and quantity<\/td>\n<\/tr>\n
Engineering function<\/td>\nSupport insulated pipe through a stiff saddle-and-rib load path and reduce direct compression of ordinary insulation at the support<\/td>\nOperating, test, occasional, friction, lateral, uplift, and dynamic reactions<\/td>\n<\/tr>\n
Construction<\/td>\nCurved outer shell with two end ribs; a centre rib may be required for larger sizes or by drawing<\/td>\nPipe OD, saddle arc, axial length, rib count, rib profile, weld detail, and clearances<\/td>\n<\/tr>\n
Materials<\/td>\nCarbon-steel plate is common; 304\/304L or 316\/316L stainless steel can be reviewed<\/td>\nMaterial specification, grade, toughness, corrosion exposure, traceability, and certificates<\/td>\n<\/tr>\n
Finish<\/td>\nPlain, painted, electro-galvanized, hot-dip galvanized, or project coating where compatible with the design<\/td>\nCoating specification, system, thickness, surface preparation, masking, and repair<\/td>\n<\/tr>\n
Insulation interface<\/td>\nInsulation is fitted around the saddle ribs and coordinated with the adjoining high-temperature system<\/td>\nInsulation type, thickness, density, temperature rating, jacket, and installation detail<\/td>\n<\/tr>\n
Support interface<\/td>\nRoller, hanger, trapeze, structural steel, or another drawing-defined bearing surface<\/td>\nContact width, roller profile, movement direction, friction basis, support elevation, and access<\/td>\n<\/tr>\n
Supply basis<\/td>\nManufactured to customer drawing, project specification, sample, or a fully defined Type 39 requirement<\/td>\nDimensions, tolerances, weld acceptance, inspection, marking, packing, and documentation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Customization Note:<\/strong> The configurations and technical values above are for selection and quotation reference. Actual dimensions vary with the applicable standard, actual pipe outside diameter, insulation thickness, saddle arc, rib arrangement, support type, loads, movement, temperature, and project requirements. YOUNGLEE can manufacture pipe covering protection saddles according to customer drawings, specifications, samples, or confirmed installation conditions. Buyers may specify material, plate thickness, axial length, rib geometry, weld details, coating, finish, and inspection requirements subject to technical review.<\/p>\n

What Engineering Problem Does a Type 39 Saddle Address?<\/h2>\n

High-temperature insulation is selected primarily for thermal performance, not necessarily for carrying concentrated support reactions. If a narrow roller or hanger bears directly on the insulation, the material can compress, crack, or lose thickness at the support point. A protection saddle introduces a stiff metallic load path: the pipe bears on the saddle ribs, the ribs transfer force into the curved shell, and the shell distributes the reaction to the support beneath it.<\/p>\n

This arrangement is particularly useful where a bare metal attachment can be incorporated into a hot insulation system and where the piping design calls for a robust support interface. The saddle does not remove the need for pipe stress analysis, insulation detailing, or support design. Its capacity depends on the exact shell, ribs, welds, material, temperature, support contact, corrosion allowance, and applied load cases.<\/p>\n

How Is a Protection Saddle Different from a Thin Insulation Shield?<\/h2>\n
\n\n\n\n\n\n\n\n\n
Component<\/th>\nTypical construction and role<\/th>\nSelection distinction<\/th>\nInformation for Buyer Confirmation<\/th>\n<\/tr>\n<\/thead>\n
Pipe covering protection saddle<\/td>\nHeavy curved plate with ribs that form a structural path between pipe and support<\/td>\nSelected for insulated hot piping, higher stiffness, rollers, and drawing-defined support reactions<\/td>\nPipe OD, rib contact, shell thickness, welds, insulation depth, loads, and support geometry<\/td>\n<\/tr>\n
Insulation protection shield<\/td>\nThin formed sheet outside the insulation that spreads hanger contact over a larger area<\/td>\nRelies on the insulation or a high-density insert to transfer the reaction<\/td>\nFinished insulated OD, shield length\/gauge, insulation compressive data, jacket, and hanger width<\/td>\n<\/tr>\n
High-density insert and shield<\/td>\nLoad-bearing insulation insert enclosed or supported by a metal shield<\/td>\nUsed when thermal and vapor-control continuity must be maintained through the support<\/td>\nInsert material, density, thermal conductivity, compressive data, vapor sealing, and temperature<\/td>\n<\/tr>\n
Pipe shoe<\/td>\nFabricated support attached to the pipe with a base that establishes elevation and bearing area<\/td>\nUsed where bottom-of-pipe height, sliding plate, guide, or anchor details are required<\/td>\nAttachment, BOP height, base plate, wear plate, loads, movement, and insulation termination<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

For a lighter load-spreading component installed outside the insulation, see YOUNGLEE’s pipe insulation protection shield<\/a>. The two products should not be interchanged merely because both are curved metal parts.<\/p>\n

Reference Geometry and Standard Boundary<\/h2>\n

ANSI\/MSS SP-58 identifies the pipe covering protection saddle as Type 39. Public industry documentation describes a standard saddle with an axial length of 12 in (304.8 mm), an arc of approximately 60 degrees, two end ribs, and a centre rib for NPS 12 (DN 300) and larger. It also describes nominal insulation thicknesses of 1 in (25.4 mm), 1 1\/2 in (38.1 mm), 2 in (50.8 mm), 2 1\/2 in (63.5 mm), 3 in (76.2 mm), 4 in (101.6 mm), and 5 1\/2 in (139.7 mm).<\/p>\n

The same industry reference gives minimum metal thicknesses of 0.12 in (3.048 mm calculated) for NPS 5 (DN 125) and smaller and 0.19 in (4.826 mm calculated) for NPS 6 (DN 150) and larger. These figures are selection references, not a universal YOUNGLEE stock series or a load rating. The project must identify the applicable SP-58 edition and any purchaser additions. Inch values are retained exactly as published and conversions are calculated from the original values using exactly 25.4 mm per inch, without rounding an inch intermediate.<\/p>\n

\n\n\n\n\n\n\n\n\n\n
Reference feature<\/th>\nIndustry reference<\/th>\nDesign significance<\/th>\nInformation for Buyer Confirmation<\/th>\n<\/tr>\n<\/thead>\n
Axial length<\/td>\n12 in (304.8 mm) standard reference<\/td>\nProvides bearing length along the pipe axis<\/td>\nSpecified length, adjacent fittings, insulation joints, and movement envelope<\/td>\n<\/tr>\n
Arc<\/td>\nApproximately 60 degrees<\/td>\nCreates the lower shell that bears on the support<\/td>\nRequired arc, roller or hanger contact, clearances, and installation orientation<\/td>\n<\/tr>\n
Rib arrangement<\/td>\nEnd ribs; centre rib for NPS 12 (DN 300) and larger in the cited series<\/td>\nTransfers the pipe reaction into the shell and controls local stiffness<\/td>\nRib count, thickness, notch\/contact profile, weld size, and allowable local stress<\/td>\n<\/tr>\n
Reference metal thickness<\/td>\n0.12 in (3.048 mm calculated) through NPS 5; 0.19 in (4.826 mm calculated) from NPS 6<\/td>\nMinimum reference only; project loads and fabrication may require more<\/td>\nApplicable edition, selected plate thickness, corrosion allowance, temperature, and design calculation<\/td>\n<\/tr>\n
Nominal insulation depth<\/td>\n1 in to 5 1\/2 in listed reference series<\/td>\nControls rib depth and the space available for insulation around the attachment<\/td>\nEvery insulation layer, installed thickness, tolerances, jacket, and field fit-up<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Customization Note:<\/strong> The dimension and thickness references above describe a commonly published Type 39 basis and are not a substitute for the contract standard or approved support drawing. Final saddle dimensions can vary with the standard edition, actual pipe OD, insulation depth, rib-to-pipe contact, roller or hanger geometry, operating and test reactions, corrosion allowance, temperature, weld design, and project requirements. YOUNGLEE can manufacture custom shell thickness, axial length, arc, rib spacing, rib profile, material, coating, and support-interface details after technical review.<\/p>\n

What Information Controls Saddle Sizing?<\/h2>\n

Nominal pipe size is only the starting identifier. The saddle ribs must suit the actual pipe OD, while their depth must suit the insulation build-up and the intended contact between rib and pipe. The outer shell then has to match the roller, hanger, or support surface beneath it. A change in insulation thickness therefore affects the rib depth and support elevation even if the carrier pipe size remains unchanged.<\/p>\n

Loads must be supplied as reactions at the support location. Operating weight alone may be insufficient: hydrotest, occasional, lateral, friction, uplift, start-up, and dynamic cases can control different parts of the saddle. Movement direction and travel also matter on roller supports because the contact point must remain within the intended shell region throughout the cold-to-hot displacement.<\/p>\n

Material, Coating, and Temperature Selection<\/h2>\n

Carbon-steel plate is a common fabrication basis. ASTM A36\/A36M may be specified for structural-quality plate where appropriate, but the material designation does not define the saddle geometry, weld capacity, temperature suitability, corrosion allowance, or completed support rating. Stainless-steel plate or sheet to ASTM A240\/A240M can be reviewed when the grade, thickness, fabrication route, environment, and project requirements are identified.<\/p>\n

Finish selection must address the whole assembly rather than the visible shell alone. Plain or painted carbon steel is often used where the saddle is protected by the insulation system or project coating. Electro-galvanized or hot-dip-galvanized finishes may be specified where their process, temperature, thickness, venting, distortion, thread fit, and repair requirements are compatible with the fabricated part. A coating must not be credited with an unverified design temperature or corrosion life.<\/p>\n

The carrier-pipe operating temperature is not automatically the temperature of every saddle surface. The thermal path, insulation arrangement, metal contact, start-up transients, and external environment influence component temperature. Material strength, coating limits, weld procedure, insulation compatibility, and touch-temperature considerations should be reviewed using the project thermal design.<\/p>\n

Insulation Detailing Around the Ribs<\/h2>\n

A Type 39 saddle intentionally places structural ribs through the insulation zone. Insulation must be cut and fitted around those ribs so voids, loose blocks, and water paths are minimized. For hot service without a vapor-retarder requirement, matching insulation segments are commonly fitted between the ribs. The insulation contractor should define joint treatment, jacket termination, weather sealing, and removable-cover details where inspection access is required.<\/p>\n

Cold service generally needs a different support concept because penetrations can compromise vapor-retarder continuity and create condensation paths. Do not select a Type 39 saddle for a cold line solely because it is mechanically robust. The insulation-system designer should decide whether a high-density insert, thermal shield, insulated pipe shoe, or another engineered support better controls heat flow and moisture.<\/p>\n

Roller, Hanger, and Structural Support Interfaces<\/h2>\n

When the saddle bears on a roller, the roller profile, width, axle alignment, contact stress, and travel must suit the shell. The saddle does not make the support frictionless and does not replace a guide or line stop. A separate guide may be needed to control lateral position while the roller carries vertical load. YOUNGLEE’s adjustable steel pipe roller stand<\/a> illustrates this movement-support function.<\/p>\n

For a fixed beam, trapeze, or hanger, the designer must confirm contact width, edge loading, rotation, uplift, and how the shell is retained. Welding the saddle to support steel changes the restraint and thermal-movement behavior; it should never be assumed from a generic product image. If a separate structural attachment is required, compare the defined load path with a welded pipe shoe with wear plate<\/a>.<\/p>\n

Manufacturing and Inspection Considerations<\/h2>\n
    \n
  • Confirm plate identity, thickness, heat or lot traceability, and surface condition before cutting and forming.<\/li>\n
  • Form the shell to a smooth radius without sharp flats or twists that would concentrate support contact.<\/li>\n
  • Profile the ribs from the actual pipe OD and insulation depth; verify the specified rib-to-pipe contact arrangement.<\/li>\n
  • Use qualified welding requirements where specified and inspect weld size, continuity, profile, distortion, and surface condition to the agreed acceptance basis.<\/li>\n
  • Check shell arc, length, rib spacing, overall height, centre rib location, support contact, and trial fit against an approved gauge or drawing.<\/li>\n
  • Apply coating only after defining surface preparation, masking, drainage, venting, edge treatment, repair, dry-film thickness, and inspection.<\/li>\n
  • Package saddles to protect curved shells, rib edges, coatings, identification, and matching sets during export handling.<\/li>\n<\/ul>\n

    Information Required for Quotation<\/h2>\n
    \n\n\n\n\n\n\n\n\n\n\n\n
    Quotation input<\/th>\nWhy it is required<\/th>\nInformation for Buyer Confirmation<\/th>\n<\/tr>\n<\/thead>\n
    Pipe definition<\/td>\nControls rib curvature and attachment fit<\/td>\nNPS or DN, actual OD, material, wall\/schedule, corrosion allowance, and tolerance<\/td>\n<\/tr>\n
    Insulation system<\/td>\nControls rib depth, void filling, jacket details, and thermal interface<\/td>\nMaterial, each layer thickness, density, temperature, jacket, and installation specification<\/td>\n<\/tr>\n
    Support function<\/td>\nSeparates vertical support, roller movement, guide, restraint, and anchor duties<\/td>\nSupport type, movement direction\/travel, clearances, friction input, and cold\/hot position<\/td>\n<\/tr>\n
    Reactions<\/td>\nControls shell, ribs, welds, and bearing checks<\/td>\nOperating, sustained, test, occasional, lateral, uplift, friction, and dynamic loads<\/td>\n<\/tr>\n
    Geometry<\/td>\nDefines the complete fabrication<\/td>\nAxial length, arc, shell thickness, rib count\/profile\/spacing, welds, elevation, and support contact<\/td>\n<\/tr>\n
    Materials and finish<\/td>\nControls strength, temperature behavior, corrosion, and fabrication route<\/td>\nMaterial grade, coating system, surface preparation, corrosion allowance, and certificates<\/td>\n<\/tr>\n
    Quality and supply<\/td>\nDefines acceptance and deliverables<\/td>\nStandard edition, drawing, tolerances, NDE, inspection, marking, documentation, quantity, and packing<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Customization Note:<\/strong> Quotation inputs must describe the complete pipe-insulation-saddle-support interface. YOUNGLEE can manufacture to approved drawings, project specifications, samples, or a fully defined Type 39 requirement. Final plate, ribs, welds, coating, dimensions, and inspection are subject to engineering and manufacturing review.<\/p>\n

    Frequently Asked Questions<\/h2>\n

    Is a Type 39 saddle installed outside the insulation?<\/h3>\n

    The curved shell is outside the insulation, while its ribs extend through the insulation zone to form the structural path toward the pipe. Insulation is fitted around the ribs according to the project detail.<\/p>\n

    Does MSS Type 39 provide one universal load rating?<\/h3>\n

    No. The type identifies a support form. Capacity depends on the selected material, shell and rib geometry, welds, temperature, support contact, corrosion allowance, and stated load cases.<\/p>\n

    Can the saddle be used on a moving hot line?<\/h3>\n

    Yes, when the saddle and supporting roller or slide arrangement are designed for the required movement. The cold and hot positions, travel direction, friction, contact width, and guide arrangement must be confirmed.<\/p>\n

    Can stainless steel be supplied?<\/h3>\n

    304\/304L and 316\/316L options can be reviewed against the environment, temperature, thickness, fabrication, welding, surface finish, galvanic interfaces, and project material specification.<\/p>\n

    What is the most important RFQ input?<\/h3>\n

    A complete support drawing with actual pipe OD, insulation build-up, support reactions, movement, saddle geometry, material, and interface details is the best basis. Nominal pipe size alone is not enough.<\/p>\n

    Request a Custom Protection Saddle Quotation<\/h2>\n

    Send YOUNGLEE the support drawing, NPS or DN, actual pipe OD, insulation type and thickness, operating temperature, support reactions, movement, roller or hanger details, saddle arc and length, rib arrangement, plate thickness, material, coating, inspection, quantity, and documentation requirements. YOUNGLEE will review the complete load path and manufacture the pipe covering protection saddle to the approved drawing or applicable project standard.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Custom MSS Type 39 pipe covering protection saddles for insulated high-temperature piping. Specify pipe OD, insulation, loads, ribs, material, finish and support interface.<\/p>\n","protected":false},"featured_media":2535,"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":[96],"product_tag":[],"_links":{"self":[{"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/product\/2536"}],"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\/2535"}],"wp:attachment":[{"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/media?parent=2536"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/product_cat?post=2536"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/product_tag?post=2536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}