In any oil & gas, LNG, petrochemical, or hydrogen industry plant, the connection between the process line and pressure measurement instruments is a critical node: it must be compact, safe, leak-free, and maintainable even under severe operating conditions. For decades, this function has been entrusted to traditional multi-valve assemblies \u2014 functional solutions but characterized by numerous sealing points, large footprints, significant weight, and installation complexity that translates into cost and time.<\/p>\n\n\n\n
Monoflange and monobloc needle valves<\/strong> represent the modern engineering response to this need: a single forged body that integrates, in a single component, the functions of isolation, venting, and \u2014 in DBB versions \u2014 double block. The result is a safer, lighter, more compact, and more manageable instrumentation architecture over the plant’s lifecycle.<\/p>\n\n\n\n In this article we explore in detail the two product families \u2014 Monoflange<\/strong> and Monoblock<\/strong> \u2014 analyzing how they work, what variants exist, the technical characteristics relevant to those specifying and procuring these components, applicable certifications, and the main areas of use.<\/p>\n\n\n\n A pressure measurement point built using the traditional approach involves a sequence of separate components: a root valve on the piping, possibly a block valve, a bleed valve, and connection fittings to the instrument. Every joint is a potential leak point. Every additional support is a mechanical stress point. Every separate component is a distinct item in the project document management system.<\/p>\n\n\n\n In high-pressure environments or with hazardous fluids, this proliferation of intermediate connections amplifies the risk of fugitive emissions, complicates inspection activities, and increases the weight of the assembly \u2014 consequently requiring additional supports that, in the presence of vibration, themselves become sources of stress on the instrument tubing.<\/p>\n\n\n\n The monolithic integral construction<\/strong> philosophy solves these problems at the root: a single body, machined from a forged billet, contains all necessary flow paths. There are no joints between root valve and bleed valve, no intermediate fittings, no additional sealing surfaces between functional components.<\/p>\n\n\n\n The monoflange needle valve<\/strong> is an integrated component designed to connect the process piping \u2014 through a flanged connection \u2014 to a transmitter, gauge, or other pressure measurement instrument, incorporating in the same body the isolation (shut-off) function and, in SBB and DBB versions, the bleed function.<\/p>\n\n\n\n The term “monoflange” derives from the main construction feature: the process flange is an integral part of the valve body, not a separate bolted or threaded component. This eliminates one of the most critical joints in traditional instrumentation installations.<\/p>\n\n\n\n The monoflange range is available in three main functional configurations, selectable based on the level of safety required by the application:<\/p>\n\n\n\n SB (Single Block):<\/strong> a single isolation needle valve. Suitable for low-risk services or as a complementary element in more complex isolation architectures.<\/p>\n\n\n\n SBB (Single Block & Bleed):<\/strong> one isolation valve plus one bleed valve. Allows the instrument to be isolated from the line and the instrument section to be safely depressurized before working on the instrument itself. This is the standard configuration for most pressure measurement applications.<\/p>\n\n\n\n DBB (Double Block & Bleed):<\/strong> two isolation valves in series plus one intermediate bleed valve. Provides a double isolation barrier with upstream seal integrity verification through the bleed. Mandatory in services with hazardous, toxic, or flammable fluids, or in applications subject to functional safety regulations. Also available in the DB variant (Double Block without bleed), configurable on request.<\/p>\n\n\n\n The design flexibility of the monoflange is also expressed in connection options:<\/p>\n\n\n\n Flange faces are available in standard finishes: Raised Face (RF)<\/strong>, Flat Face (FF)<\/strong>, and Ring Joint (RTJ)<\/strong>, to match any mating flange type and project sealing specifications.<\/p>\n\n\n\n Monoflange needle valves cover the full ASME pressure rating range, from Class 150 up to Class 2500, plus API 10000 and API 15000 classes (with a dimensional range up to 1″ 13\/16) for high-pressure wellhead and subsea applications. This makes the monoflange suitable for both standard process plants and the most severe upstream offshore services.<\/p>\n\n\n\n The monoflange range is also designed and qualified for cryogenic and low-temperature services<\/strong>, with specific solutions that guarantee structural and sealing integrity down to \u2212196\u00b0C, including resistance to severe thermal cycling typical of LNG plants. For these services, the bonnet design and material selection are adapted to ensure that the stem packing always operates at a functional temperature, even in the presence of cryogenic fluids.<\/p>\n\n\n\n The monobloc needle valve<\/strong> is a compact and robust interface \u2014 manufactured in a single forged body \u2014 designed for direct mounting between a process line or vessel and the measurement instrument. Unlike the monoflange, which is primarily oriented toward flanged connections, the monobloc favors connection versatility: threaded, welded (butt-weld or socket-weld), flanged, or Hub connections, with mixed inlet\/outlet combinations.<\/p>\n\n\n\n The monobloc is the answer to the need to eliminate traditional “Christmas tree” multi-valve assemblies \u2014 those vertical assemblies of separate fittings and valves that characterized older instrumentation installations \u2014 replacing them with a single component, workshop-tested as a system, with a single datasheet and a single material certificate.<\/p>\n\n\n\n Like the monoflange, the monobloc is available in four functional configurations:<\/p>\n\n\n\n SB (Single Block):<\/strong> single isolation for standard services.<\/p>\n\n\n\n DB (Double Block):<\/strong> double isolation without bleed, for applications where the bleed function is not required or is managed elsewhere in the architecture.<\/p>\n\n\n\n SBB (Single Block & Bleed):<\/strong> single isolation with integrated bleed. Compact solution for most direct or local pressure measurement points.<\/p>\n\n\n\n DBB (Double Block & Bleed):<\/strong> double isolation with intermediate bleed. The reference configuration for services with hazardous fluids, for applications subject to certified isolation requirements, and for any installation where it is necessary to documentally demonstrate the absence of by-pass through the isolation valve.<\/p>\n\n\n\n The feature that most distinguishes the monobloc from the monoflange is its exceptional connection flexibility, designed to accommodate any plant layout:<\/p>\n\n\n\n Threaded (NPT\/BSPP):<\/strong> for direct mounting of instruments such as gauges, pressure switches, and transmitters. Standard rating from 6,000 PSI to 10,000 PSI, with option up to 15,000 PSI.<\/p>\n\n\n\n Butt-Weld (BW) and Socket-Weld (SW):<\/strong> welded connections for permanent high-integrity joints. The pressure rating is determined by the pipe schedule (SCH 40, 80, 80S, 160, XXS). These are the preferred choice when any demountable joint on the process line is to be eliminated.<\/p>\n\n\n\n Flanged:<\/strong> inlet and\/or outlet flanged connections for direct in-line installation, up to Class 2500.<\/p>\n\n\n\n Hub:<\/strong> a clamp-type mechanical interface, designed for high-pressure services and subsea applications. Provides a significant reduction in overall assembly weight and superior resistance to vibrational stresses \u2014 critical characteristics for offshore, FPSO, and FLNG installations.<\/p>\n\n\n\n The ability to combine different connection types on the same body (e.g., BW \u00d7 Threaded, Flanged \u00d7 Threaded, Flanged \u00d7 Flanged) allows optimization of the instrumentation assembly design for any plant configuration, without the need for additional fittings.<\/p>\n\n\n\n The monobloc is available with ratings from ASME Class 150 up to Class 2500 for flanged versions, from 6,000 PSI to 10,000 PSI standard (with 15,000 PSI option) for threaded versions, and up to API 10000\/15000 for Hub or API connection versions (dimensional range up to 1″ 13\/16). The rating of BW\/SW versions is determined by the connecting pipe schedule.<\/p>\n\n\n\n The bonnet is the component that houses the stem sealing mechanism and determines its long-term reliability. In monoflange and monobloc needle valves, the choice of bonnet design is as important as the choice of functional configuration (SB, SBB, DBB).<\/p>\n\n\n\n Regardless of the specific design, all bonnets share three fundamental construction features:<\/p>\n\n\n\n Anti-blow-out stem:<\/strong> the design physically prevents the stem from being ejected from the body in the event of overpressure or operational error. It is a primary safety requirement for any instrumentation valve in high-pressure service.<\/p>\n\n\n\n Non-rotating stem tip:<\/strong> the plug tip is free to rotate relative to the stem. When the operator actuates the valve, the closure pin moves down (or up) without the tip rotating on the seat. This prevents seat wear \u2014 one of the most frequent causes of leaks in traditional designs where the stem and tip are machined from a single piece.<\/p>\n\n\n\n Double sealing point:<\/strong> the design provides primary and secondary seals, ensuring absolutely leak-free performance even under variable operating conditions.<\/p>\n\n\n\n Standard threaded bonnet:<\/strong> the bonnet is threaded into the valve body. Simple design suitable for general service. The seal relies on the threads and an optional gasket.<\/p>\n\n\n\n Anti-tamper threaded bonnet:<\/strong> a version of the threaded bonnet with a safety device that prevents unauthorized disassembly. Used in applications where accidental or unauthorized tampering with the valve setting is to be prevented.<\/p>\n\n\n\n Threaded bonnet with locking device:<\/strong> equipped with a locking device (locking pin or padlockable) that prevents accidental valve actuation. Required in applications where the valve must be maintained in a defined position (open or closed) and its movement must be formally authorized.<\/p>\n\n\n\n OS&Y Bonnet (Outside Screw & Yoke) \u2014 API 602:<\/strong> the stem nut is external to the pressurized zone, housed in the rigid yoke attached to the bonnet. When the operator turns the handwheel, the stem translates vertically without the thread ever coming into contact with the process fluid. This design prevents corrosion, erosion, and contamination of the thread, ensuring smoother operation over time and a longer service life. Also available in a compact OS&Y variant.<\/p>\n\n\n\n Lockable OS&Y bonnet:<\/strong> a version of the OS&Y bonnet with an integrated locking device to prevent unauthorized movement. Also available with 50 mm insulation and 80 mm lockable insulation variants, for applications where the bonnet must be thermally protected.<\/p>\n\n\n\n Cryogenic lockable OS&Y bonnet:<\/strong> an OS&Y variant specifically designed for cryogenic services, with an extended bonnet design that positions the stem packing away from the cold zone, ensuring the seal always operates at a functional temperature.<\/p>\n\n\n\n Standard bolted bonnet:<\/strong> the bonnet is secured to the body by a separate bolted bracket. Provides maximum resistance at the body-bonnet joint and is the preferred choice for high-temperature, high-pressure, or thermally intensive cycling applications, where pressure boundary integrity must be guaranteed even under mechanical stress.<\/p>\n\n\n\n Extended bolted bonnet:<\/strong> a version of the bolted bonnet with an elongated body, designed as a thermal barrier for high-temperature or cryogenic services. The extended bonnet keeps the stem packing away from the extreme process zone.<\/p>\n\n\n\n Bonnets use a standard functional color code<\/strong> for immediate identification of each valve’s function on the assembly: blue for the isolation valve, red for the vent valve, green for the equalization valve. This system, immediately understandable to maintenance operators, reduces the risk of incorrect actuation during field operations.<\/p>\n\n\n\n The choice of body and fluid-wetted part material is crucial for the component’s service life and process safety. The full range of industrial materials is available:<\/p>\n\n\n\n Carbon steels:<\/strong> A105 for standard non-corrosive services; A350 LF2 for low-temperature (LT) services, with guaranteed toughness down to \u221246\u00b0C.<\/p>\n\n\n\n Austenitic stainless steel:<\/strong> SS 316\/316L Dual Grade, the reference material for most applications in corrosive environments, with process services containing water, steam, hydrocarbons, and weak acids.<\/p>\n\n\n\n Duplex and Super Duplex:<\/strong> F51 (22Cr Duplex) and F53\/F55 (25Cr Super Duplex), for highly corrosive environments, in the presence of chlorides, H\u2082S, and offshore applications. They offer a combination of superior mechanical strength and corrosion resistance that allows wall thicknesses to be reduced while maintaining the pressure rating.<\/p>\n\n\n\n Nickel alloys:<\/strong> Inconel 625 and Incoloy 825 for high-temperature services, strongly corrosive environments, or in the presence of sour gases where even Super Duplex may not be sufficient.<\/p>\n\n\n\n Monel 400:<\/strong> for services with hydrofluoric acid, seawater, and certain inorganic acids where stainless steel does not provide adequate performance.<\/p>\n\n\n\n Hastelloy C276:<\/strong> for the most corrosive services, with strong oxidizing acids, halogenated solvents, and aggressive mixtures.<\/p>\n\n\n\n Titanium:<\/strong> for applications with strong acids or particularly corrosive environments where nickel alloys are not applicable.<\/p>\n\n\n\n NACE-compliant materials:<\/strong> for all sour service applications (H\u2082S), materials compliant with NACE MR0175\/ISO 15156 are supplied, with documentary attestation included in the supply documentation.<\/p>\n\n\n\n Seals<\/strong> are available in PTFE (standard, for most services) and Graphite (for high temperatures or services with heavy hydrocarbons that could cause swelling of polymer seals). Solutions on request are available for special services.<\/p>\n\n\n\n The range of options available for monoflanges and monoblocs allows the standard product to be tailored to the most diverse specifications without resorting to fully custom designs:<\/p>\n\n\n\n Locking devices:<\/strong> standard locking device, quick locking device (for faster locking), padlock (for padlocking with a standard lock). Essential in applications where valve actuation must follow Permit to Work (PTW) or Lock Out\/Tag Out (LOTO) procedures.<\/p>\n\n\n\n Swivelling connection:<\/strong> allows the outlet connection to the instrument to be rotated relative to the valve body, facilitating alignment in installations with limited space or non-standard piping geometries.<\/p>\n\n\n\n Oxygen service:<\/strong> versions specifically prepared for oxygen service (O\u2082 clean service), with certified degreasing of all components and compatible lubricants.<\/p>\n\n\n\n Hydrogen service:<\/strong> versions optimized for high-pressure hydrogen production and distribution, with low fugitive emissions per ISO 15848-1 and materials selected for resistance to hydrogen embrittlement.<\/p>\n\n\n\n Fire Safe version:<\/strong> designed and tested per ISO 10497 \/ API 607 \/ API 6FA, guarantees sealing of the pressure boundary even under fire conditions. Mandatory in many project specifications for plants classified as fire hazard areas.<\/p>\n\n\n\n Fugitive Emission ISO 15848-1 & 2:<\/strong> for applications subject to certified fugitive emission requirements (increasingly required by end clients in project specifications).<\/p>\n\n\n\n Painting treatment:<\/strong> primer and finishes per project specifications (RAL, NORSOK colors, etc.).<\/p>\n\n\n\n Autoclave connection:<\/strong> for wellhead applications with autoclave-type connections, on request.<\/p>\n\n\n\n One of the differentiating factors in evaluating an instrumentation valve supplier is the degree of control over the production process. All production phases for monoflanges and monoblocs are performed internally:<\/p>\n\n\n\n Engineering and design:<\/strong> component and assembly design, with structural calculations and regulatory compliance verification performed by the in-house technical office.<\/p>\n\n\n\n Machining:<\/strong> all valve bodies are machined from forged billets on multi-axis CNC machining centers, ensuring tight dimensional tolerances and perfect concentricity of internal flow paths.<\/p>\n\n\n\n Quality control and NDT:<\/strong> each valve is subjected to dimensional checks and non-destructive inspections (PMI \u2014 Positive Material Identification, UT \u2014 Ultrasonic Testing, DP \u2014 Liquid Penetrant, MP \u2014 Magnetic Particle, HRC \u2014 Rockwell Hardness) performed internally.<\/p>\n\n\n\n Assembly:<\/strong> mounting and adjustment performed by qualified in-house personnel.<\/p>\n\n\n\n High-pressure testing in bunker:<\/strong> a high-pressure gas testing bunker<\/strong> is available up to 15,000 PSI<\/strong>, where each valve can be tested under the most severe service conditions. This allows complete Factory Acceptance Tests (FAT) to be performed in-house, including high-pressure gas tests in a protected environment.<\/p>\n\n\n\n Cryogenic testing:<\/strong> cryogenic chamber available for production and prototype testing down to \u2212196\u00b0C.<\/p>\n\n\n\n High-temperature testing:<\/strong> chamber available for testing up to 650\u00b0C.<\/p>\n\n\n\n Fugitive emission testing:<\/strong> climatic chamber suitable for PR2F and TAT tests, for production qualification per ISO 15848-1 & 2.<\/p>\n\n\n\n This level of vertical integration is particularly relevant for EPC and procurement teams: it means that the complete product traceability \u2014 from billet analysis to final testing \u2014 is documented by a single responsible supplier, with direct implications for simplifying project document management.<\/p>\n\n\n\n Monoflange and monobloc needle valves are certified to the most relevant international standards for critical industrial applications:<\/p>\n\n\n\n Fire Safe \u2014 ISO 10497 \/ API 607 \/ API 6FA:<\/strong> certification attesting to pressure boundary sealing and valve functionality under fire conditions. Standard requirement in many EPC specifications for oil & gas plants.<\/p>\n\n\n\n Fugitive Emission \u2014 ISO 15848-1 & 2:<\/strong> certification of fugitive emissions through stem and bonnet seals. ISO 15848-1 covers design qualification (Type Testing), ISO 15848-2 covers production qualification (Production Testing). Increasingly required by end clients as a contractual requirement.<\/p>\n\n\n\n PED 2014\/68\/EU:<\/strong> European Pressure Equipment Directive, mandatory for all components placed on the European market above the exemption thresholds set by the directive.<\/p>\n\n\n\n ATEX 2014\/34\/EU:<\/strong> European directive for components intended for installation in potentially explosive atmospheres (ATEX classified zones). Mandatory for installations in classified areas in European plants and in many international projects adopting European standards.<\/p>\n\n\n\n CRN Canada (all provinces):<\/strong> Canadian Registration Number registration is mandatory for all pressure equipment used in Canada. Coverage of all provinces eliminates the need for separate registrations.<\/p>\n\n\n\n CU-TR for EAC Countries:<\/strong> mandatory certification for the Eurasian Economic Union markets (Russia, Kazakhstan, Belarus, and other EAC countries).<\/p>\n\n\n\n Company management system certifications<\/strong> complete the picture: ISO 9001:2015 (Quality Management System), ISO 45001:2018 (Occupational Health & Safety), and ISO 14001:2015 (Environmental Management System).<\/p>\n\n\n\n For applications with particular requirements \u2014 non-standard layouts, extreme services, stringent client specifications \u2014 tailor-made solutions are developed through a structured co-engineering process with the client. This approach involves an in-depth analysis of specific requirements, custom component design, selection of the most appropriate materials for the service, special configurations not in the catalogue, specific qualification tests, and \u2014 where required \u2014 integrated solutions with automation.<\/p>\n\n\n\n Some of the most recurring tailor-made configurations include:<\/p>\n\n\n\n Monoflanges and monoblocs are standard components in pressure measurement skids for upstream and midstream applications. The availability of ratings up to ASME Class 2500 and API 15,000 PSI also covers the most severe wellhead and gathering applications. The possibility of Fire Safe and ATEX certification makes them suitable for any classified zone in an oil & gas plant.<\/p>\n\n\n\n For liquefaction, storage, and regasification plants, needle valves in cryogenic version \u2014 with extended bonnet, materials qualified for low temperatures, and resistance to severe thermal cycling \u2014 are the reference solution for pressure measurement points. The guaranteed minimum temperature of \u2212196\u00b0C covers both LNG services and applications with liquid nitrogen or other cryogenic fluids.<\/p>\n\n\n\n With the acceleration of the energy transition, hydrogen \u2014 both green produced by electrolysis and blue from reforming with CO\u2082 capture \u2014 is becoming a primary industrial energy carrier. Hydrogen service valves require specific materials (resistant to hydrogen embrittlement at high pressure), low fugitive emissions (ISO 15848-1), and a design that accounts for the molecular permeation characteristics typical of H\u2082. The monoflange\/monobloc range is available in a specific version for hydrogen service, with dedicated material qualifications and ad hoc testing.<\/p>\n\n\n\n In petrochemical and chemical plants, the variety of process fluids \u2014 from light hydrocarbons to strong acids, from solvents to toxic gases \u2014 requires very broad material selection capability. The availability of exotic materials (Inconel, Hastelloy, Monel, Titanium) and special seals allows even the most aggressive services to be covered, maintaining the integral construction philosophy that ensures the minimum possible number of sealing points.<\/p>\n\n\n\n For those specifying a monoflange or monobloc needle valve, here are the essential technical parameters to determine before formalizing the request:<\/p>\n\n\n\n Product type:<\/strong> monoflange (flanged connection on process side) or monobloc (threaded, welded, or flanged connection, for direct mounting to the instrument or piping).<\/p>\n\n\n\n Functional configuration:<\/strong> SB, DB, SBB, or DBB \u2014 based on the level of isolation required by the process risk analysis and project specifications.<\/p>\n\n\n\n Pressure rating:<\/strong> ASME class (150, 300, 600, 900, 1500, 2500) for flanged versions; PSI (6000, 10000, 15000) for threaded versions; schedule (40, 80, 160, XXS) for BW\/SW versions.<\/p>\n\n\n\n Connections:<\/strong> define the inlet connection type (flange, thread, BW, SW, Hub) and outlet (thread, flange, integral tube connection). For flanged versions, specify the nominal diameter and face finish (RF, FF, RTJ).<\/p>\n\n\n\n Design temperature:<\/strong> distinguishing the normal operating range from the minimum temperature (for LT or cryogenic qualifications) and the maximum design temperature.<\/p>\n\n\n\n Fluid and service:<\/strong> identify the process fluid, presence of H\u2082S (sour service \u2014 NACE MR0175), toxicity, flammability, presence of suspended solids. Specify whether the service is classified as hydrogen service, oxygen service, or cryogenic service.<\/p>\n\n\n\n Material:<\/strong> define body and bonnet material based on service. If in doubt, provide the process conditions (temperature, pressure, fluid chemical composition) to receive a documented recommendation.<\/p>\n\n\n\n Seals:<\/strong> PTFE standard or Graphite for high temperatures.<\/p>\n\n\n\n Bonnet type:<\/strong> screwed standard, OS&Y, bolted, extended \u2014 based on process conditions (temperature, pressure) and operational requirements (locking, anti-tamper, cryogenic).<\/p>\n\n\n\n Options:<\/strong> fire safe, fugitive emission ISO 15848, locking device, padlock, hydrogen\/oxygen service, painting, CRN, CU-TR.<\/p>\n\n\n\n Documentation:<\/strong> define the required documentation level (datasheet, construction drawings, material certificates 3.1 or 3.2 per EN 10204, hydrostatic test reports, PMI testing, NDT, special tests).<\/p>\n\n\n\n The choice to adopt monoflange and monobloc needle valves in place of traditional multi-valve assemblies is not merely a design preference: it is a technical decision with a direct impact on operational safety, fugitive emissions, installation costs, instrumentation system weight, and document management complexity.<\/p>\n\n\n\n The integral forged construction eliminates intermediate joints, reduces sealing points, simplifies FAT and documentary traceability. The range of functional configurations (SB, DB, SBB, DBB), connection flexibility, variety of materials \u2014 from carbon steels through to Hastelloy and Titanium \u2014 and the portfolio of options and certifications make these products suitable for covering virtually all industrial application scenarios, from upstream oil & gas to hydrogen energy, from cryogenic processes to high-temperature applications.<\/p>\n\n\n\n For EPC teams, system integrators, and skid makers, having a supplier that designs, manufactures, assembles, and tests the entire product in-house \u2014 with test qualifications up to 15,000 PSI with gas in a bunker, cryogenic testing down to \u2212196\u00b0C, and high-temperature testing up to 650\u00b0C \u2014 means reducing technical risk and simplifying the supply chain for one of the most widespread and critical components in industrial plant engineering.<\/p>\n\n\n\n For technical support in specification or to request detailed technical documentation, contact the Indra team: indra@indra.it<\/a> \u2014 sales@indra.it<\/a><\/em><\/p>\n\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" In any oil & gas, LNG, petrochemical, or hydrogen industry plant, the connection between the process line and pressure measurement instruments is a critical node: it must be compact, safe, leak-free, and maintainable even under severe operating conditions. For decades, this function has been entrusted to traditional multi-valve assemblies \u2014 functional solutions but characterized by […]<\/p>\n","protected":false},"author":3,"featured_media":1574,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"footnotes":""},"categories":[27],"tags":[],"class_list":["post-1573","post","type-post","status-publish","format-standard","has-post-thumbnail","category-technical-insights"],"acf":[],"_links":{"self":[{"href":"https:\/\/staging.indra.it\/en\/wp-json\/wp\/v2\/posts\/1573","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/staging.indra.it\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/staging.indra.it\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/staging.indra.it\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/staging.indra.it\/en\/wp-json\/wp\/v2\/comments?post=1573"}],"version-history":[{"count":1,"href":"https:\/\/staging.indra.it\/en\/wp-json\/wp\/v2\/posts\/1573\/revisions"}],"predecessor-version":[{"id":1577,"href":"https:\/\/staging.indra.it\/en\/wp-json\/wp\/v2\/posts\/1573\/revisions\/1577"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/staging.indra.it\/en\/wp-json\/wp\/v2\/media\/1574"}],"wp:attachment":[{"href":"https:\/\/staging.indra.it\/en\/wp-json\/wp\/v2\/media?parent=1573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/staging.indra.it\/en\/wp-json\/wp\/v2\/categories?post=1573"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/staging.indra.it\/en\/wp-json\/wp\/v2\/tags?post=1573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}The Problem They Solve: Limitations of Traditional Multi-Valve Installations<\/h2>\n\n\n\n
Monoflange Needle Valves: Definition, Function, and Advantages<\/h2>\n\n\n\n
What Is a Monoflange Needle Valve<\/h3>\n\n\n\n
Available Functional Configurations<\/h3>\n\n\n\n
Connection Options and Flange Face<\/h3>\n\n\n\n
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Monoflange Pressure Rating<\/h3>\n\n\n\n
Cryogenic and Low-Temperature Applications<\/h3>\n\n\n\n
Monobloc Needle Valves: The Heavy-Duty Solution for Direct Mounting<\/h2>\n\n\n\n
What Is a Monobloc Needle Valve<\/h3>\n\n\n\n
Available Functional Configurations<\/h3>\n\n\n\n
Monobloc Connection Options<\/h3>\n\n\n\n
Monobloc Pressure Rating<\/h3>\n\n\n\n
Bonnet Technology: The Heart of Long-Term Performance<\/h2>\n\n\n\n
Construction Features Common to All Bonnets<\/h3>\n\n\n\n
Available Bonnet Types<\/h3>\n\n\n\n
Bonnet Color Code<\/h3>\n\n\n\n
Materials: From Standard Selection to Exotic Alloys<\/h2>\n\n\n\n
Options and Accessories: Customization for Every Application Need<\/h2>\n\n\n\n
The Production Process: Fully In-House for Total Quality Control<\/h2>\n\n\n\n
Product Certifications<\/h2>\n\n\n\n
Tailor-Made Approach: When Standard Is Not Enough<\/h2>\n\n\n\n
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Sectors and Applications<\/h2>\n\n\n\n
Oil & Gas Upstream and Midstream<\/h3>\n\n\n\n
LNG and Cryogenic<\/h3>\n\n\n\n
Hydrogen Industry<\/h3>\n\n\n\n
Petrochemical and Chemical<\/h3>\n\n\n\n
Specification Guide: Parameters to Define for the Request for Quotation<\/h2>\n\n\n\n
Conclusions: Monoflange and Monobloc as a Strategic Technical Choice<\/h2>\n\n\n\n