Forging Steel Globe Valve | NPS 1/4"–2" | Class150–2500 | -29~550℃ | API602

Forging Steel Globe Valve - linear motion valve for throttling + shut-off. Forging - heated steel compressive forces align grain structure, superior strength. High-grade forged steel (A105, F304/F316/F304L/F316L, F11/F22). Precise flow - stem perpendicular to seat, disc vertical, opening proportional travel, throttling + shut-off. Sealing - metal-to-metal, Stellite hardfacing, gaskets (SS+graphite/PTFE), leak-tight HP/HT. Multiple bonnet - bolted/welded/pressure seal. OS&Y - threads outside body, protected, easy maintenance. Range - water/steam/oil/gas/chemicals, -29~550℃, CL150–2500 (PN16–420). Compact, short stroke, split design. NPS 1/4"–2" (DN8–50). Connection flange/SW/BW/thread. Operation manual/pneumatic/electric/hydraulic. API602/ASME B16.34/BS5352, test API598. Oil&gas/power/chemical/heating/marine. OEM/ODM, factory direct.

1. Superior Forging Quality - A105/F304/F316/F304L/F316L/F11/F22, Aligned Grain, No Internal Defects, Superior Strength/Toughness, Cyclic Loading/HP/Thermal Stress, No Cracking/Leakage vs Cast: Made of high-grade forged steel (ASTM A105, A182 F304, F316, F304L, F316L, F11, F22, etc.), the valve body and core components have no internal defects, ensuring excellent mechanical strength and toughness to withstand cyclic loading, high pressure, and thermal stresses that might cause cracking or leakage in cast valves. Unlike cast valves, our forging steel globe valve adopts a precision forging process - heated steel is shaped by localized compressive forces to align the metal's grain structure, resulting in superior mechanical strength, enhanced impact resistance, and improved structural integrity. Forging eliminates casting defects such as sand holes, porosity, inclusions, and shrinkage - common in cast valves that can lead to leakage or failure under high pressure. The aligned grain flow follows the contour of the valve body, providing maximum strength in the direction of stress. Forged steel also has a finer, more uniform microstructure - improving fatigue resistance and reliability under cyclic operation. This makes forged steel globe valves the preferred choice for critical, high-pressure, high-temperature service where failure is not acceptable - such as oil & gas transmission, power plant steam, and chemical process lines. All forgings undergo UT (ultrasonic testing) and MT (magnetic particle testing) to verify no internal or surface defects. All materials supplied with MTR (Material Test Report) EN 10204 3.1 and heat-number traceability. The forging process also allows closer dimensional control and better surface finish than casting - reducing machining time and improving overall quality.

2. Precise Flow Control - Stem Axis Perpendicular to Seat, Disc Vertical Smooth, Opening Proportional to Travel, Ideal Throttling + Reliable Shut-Off: The valve stem axis is perpendicular to the valve seat sealing surface, allowing the disc to move smoothly in a vertical direction. This design ensures a proportional relationship between valve opening and disc travel, making it ideal for precise throttling and flow regulation, as well as reliable shut-off performance. The linear motion of the plug disc allows stepless adjustment of flow rates - flow area changes proportionally with disc lift, providing a stable, predictable flow characteristic (approximately linear). This enables: (a) Precise flow regulation - adjust flow to exact process requirements; (b) Reliable shut-off - when fully closed, the disc seats tightly, providing positive isolation; (c) Gradual opening/closing - reduces water hammer and pressure surges, protecting downstream equipment. The stem axis perpendicular to the seat ensures the disc seats squarely and uniformly - preventing uneven wear and maintaining sealing consistency over many cycles. The disc and stem are connected via a T-slot or threaded connection - allowing the disc to self-align during seating, compensating for minor misalignment and ensuring uniform contact pressure across the sealing surface. This precise flow control capability makes the valve suitable for both throttling and isolation - far beyond the capabilities of gate valves (which should only be fully open/closed). For automated precise regulation, an electric actuator with 4-20mA positioner can be mounted - providing remote modulating control. Note: for continuous severe throttling at very high pressure drop, a dedicated control valve with anti-cavitation trim may be more suitable - consult factory.

3. Excellent Sealing Performance - Metal-to-Metal, Stellite Cobalt Hardfacing, Gaskets (Corrugated SS+Graphite, SS+PTFE), Leak-Tight HP/HT, Prevents Leakage: Adopts metal-to-metal sealing structure with Stellite cobalt-based hardfacing on sealing surfaces, combined with high-quality gaskets (corrugated SS + graphite, SS + PTFE, etc.), ensuring leak-tight performance even in high-pressure and high-temperature environments, effectively preventing fluid leakage. The Stellite (cobalt-chromium-tungsten) hardfacing is applied to both the disc and seat sealing surfaces via welding (PTA/plasma transferred arc or OAW/oxy-acetylene) - providing: (a) Extreme hardness (HRC 40–45) - resistant to abrasion, erosion, and galling; (b) High-temperature resistance - retains hardness at elevated temperatures (to 650℃+), suitable for steam and hot oil; (c) Corrosion resistance - cobalt-chromium matrix resists many corrosive media; (d) Long service life - hardfaced surfaces wear slowly, maintaining sealing over many cycles. After hardfacing, the sealing surfaces are CNC machined and lapped to a mirror finish (Ra ≤0.8μm) - ensuring intimate metal-to-metal contact and zero visible leakage per API 598. The bonnet gasket options: (a) Corrugated SS + graphite - for high-temperature/high-pressure general service (to 550℃); (b) SS + PTFE - for chemical/corrosive service (≤200℃); (c) Spiral-wound graphite/stainless - standard for most applications. The stem packing is flexible graphite (for high-temp/general) or PTFE (for chemical) - providing reliable stem sealing. This combination of Stellite hardfaced metal seal + quality gasket + graphite packing ensures leak-tight performance in the most demanding HP/HT conditions. Every valve is 100% seat-tested at 1.1× rated pressure per API 598 - zero visible leakage.

4. Multiple Bonnet & OS&Y Design - Bolted Bonnet (Male-Female + Spiral Wound Gasket), Welded Bonnet (Threaded + Seal Weld), Pressure Seal Bonnet; OS&Y Threads Outside Body, Protected from High Temp/Corrosive/Solids, Easy Maintenance: Available in three bonnet types to meet different application needs: (a) Bolted bonnet - with male-female joint and spiral wound gasket, the most common design, allows easy disassembly for maintenance, suitable for Class 150–600 general service; (b) Welded bonnet - threaded and seal welded, provides a permanent, leak-free bonnet joint, no gasket to fail, suitable for high-pressure/hazardous service where bonnet leakage is unacceptable (Class 600+), requires cutting the seal weld for maintenance; (c) Pressure seal bonnet - threaded and pressure seal joint, the internal system pressure actually energizes the seal (higher pressure = tighter seal), ideal for very high pressure (Class 900–2500) where bolted bonnets would require enormous bolts. All three ensure reliable sealing and easy maintenance (relative to their design). Outside Screw and Yoke (OS&Y) design: the valve stem threads are isolated from the medium by packing, keeping the threads outside the valve body to avoid damage from high temperatures, corrosives, and solids. The external screw is easy to lubricate and maintain - and provides visual position indication (stem rises when open, lowers when closed), allowing operators to see valve position at a glance. The yoke supports the stem and bushing - ensuring smooth stem operation and preventing side loading. OS&Y is standard for most industrial globe valves - especially suitable for demanding industrial applications where stem thread protection and position indication are required. The combination of multiple bonnet options + OS&Y ensures the valve can be configured for any pressure/temperature/service condition - from general Class 150 to ultra-high Class 2500.

5. Wide Operating Range - Water/Steam/Oil/Gas/Corrosive Chemicals/Hydrocarbons, -29~550℃, Class150–2500 (PN16–420), NPS 1/4"–2" (DN8–50): Suitable for mediums such as water, steam, oil, gas, and corrosive chemicals, hydrocarbons, with an operating temperature range of -29℃~550℃ and pressure rating up to ASME Class 2500 (PN420), adapting to various harsh working conditions. Size range: NPS 1/4"–2" (DN8–DN50) - this is a compact, small-bore forged valve per API 602 (compact steel gate/globe/check valves for petroleum and natural gas industries), ideal for small-bore critical service, instrumentation, bypass lines, and high-pressure applications where larger cast valves are not available or economical. Pressure range: ASME Class 150–2500 (PN16–PN420) - covering general process to ultra-high pressure. The forged steel construction is essential for these high pressures - cast valves would be too bulky or unreliable at Class 1500+. Temperature range: -29℃~+550℃ - carbon steel (A105) to 425℃, alloy steel (F11/F22) to 550℃+ for high-temperature steam, stainless (F304/F316) to 425℃ continuous (and cryogenic to -196℃ with extended bonnet option). The wide material range (carbon/stainless/alloy) allows optimal selection per medium and temperature. This combination of small size + ultra-high pressure + wide temperature makes the forged steel globe valve unique - it is the go-to valve for small-bore high-pressure critical service in oil & gas, power, and petrochemical plants. Note: for larger sizes (NPS≥2"), see our cast steel globe valve series.

6. Easy Installation & Maintenance - Compact Structure, Short Stroke Quick Response, Split Design Easy Disassembly, No Pipeline Removal, Reduces Downtime/Cost: The valve structure is compact and reasonable, with short opening and closing stroke for quick response. The split design allows easy disassembly and maintenance without removing the entire valve from the pipeline, reducing downtime and maintenance costs. The compact forged body has a shorter face-to-face dimension than equivalent cast valves - saving space in tight piping runs and equipment skids. The short stroke means faster open/close operation - reducing actuation time for pneumatic/electric operators and minimizing water hammer. For bolted bonnet design: simply unbolt the bonnet, lift out the bonnet/stem/disc assembly, and access the seat and body for inspection or repair - all without removing the valve body from the pipeline (flanged/SW/BW ends remain connected). This significantly reduces maintenance time - especially for welded-end valves where removing the valve would require cutting and re-welding. The OS&Y design allows easy stem packing replacement (if backseat equipped) and stem lubrication. The Stellite hardfaced seat/disc are long-wearing - reducing the frequency of maintenance. Routine maintenance is minimal: periodic inspection of packing for leakage, lubrication of stem threads and yoke bushing, and seat/disc inspection during planned outages. The valve is designed for long service life with minimal intervention - reducing total cost of ownership over the valve's lifetime. For welded/pressure seal bonnet designs, maintenance requires cutting the seal weld or unthreading the bonnet - still possible but more involved; these are typically used in critical service where maintenance is infrequent and leakage prevention is paramount.

Forging Steel Globe Valve: forged body (A105/F304/F316/F11/F22), flanged/SW/BW/thread ends, bolted/welded/pressure seal bonnet, OS&Y rising stem, disc, Stellite seat, handwheel. Handwheel rotates stem - rises/lowers, disc moves vertically, axis perpendicular seat. Opening: disc lifts, flow passes - area increases. Closing: disc lowers onto Stellite seat, blocks flow - metal seal, zero leak. Linear movement enables precise throttling (opening proportional travel). OS&Y threads outside body, protected. Forged body aligned grain, superior strength HP/HT. Multiple bonnet per pressure. On/off + throttling. NPS 1/4"–2" (DN8–50), CL150–2500, -29~550℃. API602/ASME B16.34/API598.

Oil & Gas Industry - Oil/Gas Production, Transmission Pipelines, Refineries, Hydrocarbons, Steam, High-Pressure Gases: Used in oil and gas production, transmission pipelines, and refineries - handling hydrocarbons, steam, and high-pressure gases. The forged steel construction (A105 carbon, F11/F22 alloy) withstands high pressure (up to Class 2500) and cyclic loading in transmission lines; the Stellite hardfaced seal resists erosion from high-velocity gas and particulates; the multiple bonnet options (bolted/welded/pressure seal) allow configuration per pressure class - pressure seal bonnet for Class 900+ transmission. Small-bore NPS 1/4"–2" is ideal for instrument taps, bypass lines, and small-bore process connections in refineries and wellheads. Socket weld and threaded ends are common for small-bore high-pressure oilfield service. The OS&Y design provides visual position indication for operators. Pneumatic actuator option for emergency shut-down (ESD) on wellheads and pipelines. API 602 compliance ensures compatibility with petroleum industry specifications.

Power Generation - Thermal/Nuclear Plants, Steam Flow, Feedwater, Condensate Systems, HP/HT Vital: Applied in thermal power plants and nuclear power plants - managing steam flow, feedwater, and condensate systems where high pressure and temperature resistance are vital. The alloy steel body (F11/F22, Cr-Mo) handles high-temperature steam >450℃; the Stellite hardfaced seat resists steam erosion; the forged body withstands thermal cycling and high pressure in boiler feedwater and main steam lines. The precise throttling allows accurate control of feedwater and steam flow. The bolted bonnet allows in-line maintenance during planned outages. Small-bore sizes are used for instrument connections, drain lines, vent lines, and auxiliary systems around boilers and turbines. The pressure seal bonnet option is used for high-pressure boiler feedwater (Class 1500+). The OS&Y design provides clear position indication in power plant control rooms. Flange or butt-weld connection per power plant piping codes (ASME B31.1).

Chemical & Petrochemical - Chemical Processing, Corrosive Chemicals, Acids, Alkalis, Aggressive Media: Ideal for chemical processing plants - handling corrosive chemicals, acids, alkalis, and other aggressive media. The stainless steel body (F304/F316/F304L/F316L) resists corrosive chemicals; the F316L (low-carbon) provides superior corrosion resistance and weldability for critical corrosive service; the Stellite seat resists abrasion from chemical slurries; the metal-to-metal seal with graphite packing handles high-temperature chemical processes. The precise throttling allows accurate control of chemical feed rates to reactors. The multiple bonnet options allow selection per pressure - welded bonnet for hazardous chemical service where bonnet leakage is unacceptable. Small-bore sizes are used for chemical dosing, sample lines, and small process connections. Socket weld and threaded ends common for small-bore chemical piping. The forged stainless body has no casting defects - eliminating potential leak paths in corrosive service. API 602 / ASME B16.34 compliance ensures global compatibility.

Industrial & Utility - Urban Heating Systems, Marine Engineering, Pharmaceutical Manufacturing, Automotive, HP/HT Pipelines: Used in urban heating systems (district heating, hot water/steam distribution - forged body withstands thermal cycling, compact size fits heating substations), marine engineering (shipboard piping, offshore platforms - forged steel resists vibration and shock, small-bore for auxiliary systems, stainless F316 for saltwater corrosion resistance), pharmaceutical manufacturing (F316L stainless for sanitary/corrosive process lines, forged body no defects for clean service), and automotive industry (test rigs, hydraulic systems, high-pressure fluid lines - compact forged valve handles high pressure). The wide material range (carbon/stainless/alloy) and connection options (flange/SW/BW/thread) allow configuration per specific industry needs. The compact size and light weight make it suitable for mobile and space-constrained applications. The OS&Y design and easy maintenance reduce downtime in industrial utility systems.

General & Custom - OEM/ODM, Small-Bore Critical Service, Instrumentation, Hydraulic, Wide Media: Suitable for OEM/ODM custom applications - custom sizes, materials, logos, packaging per specific industrial needs. The small-bore forged globe valve is widely used as a component in larger equipment and systems - instrument manifolds, control panels, hydraulic power units, skid-mounted process equipment. The wide media compatibility (water, steam, oil, gas, corrosive chemicals, hydrocarbons) and operation modes (manual/pneumatic/electric/hydraulic) make it versatile. The hydraulic operation option is suitable for high-pressure hydraulic systems and remote actuation. The electric actuator option for automated control. The valve supports custom configurations - special materials (F91/F92 for ultra-high temp), extended bonnet for cryogenic, special end connections, custom testing. This versatility makes the forged steel globe valve a standard component in diverse industrial projects worldwide - from small OEM equipment to large industrial plants. We work closely with customers to develop custom solutions for special applications.

Every Forging Steel Globe Valve: Forging - forged steel (A105, F304/F316/F304L/F316L, F11/F22), UT/MT, superior strength. Material - certified, MTR 3.1, heat traceable, chemical. Trim - Stellite hardfacing disc/seat, machined, stem. Machining - flange/SW/BW, dimensions. Assembly - bolted/welded/pressure seal bonnet, OS&Y stem, disc, stroke, no binding. Pressure - 100% shell 1.5×PN, seat 1.1×PN, zero leak API598/EN12266. Functional - open/close cycle, smooth, throttling. Surface - carbon paint, stainless pickled. Marking - MSS SP25, SS304 laser nameplate, material/size/pressure/serial. Standards API602/ASME B16.34/BS5352/EN ISO15761/JB/T7746. Docs - MTR, cert. Lead: 25–45 days. Warranty: 18 months.

Q1: What is the difference between forged steel and cast steel globe valves, and why choose forged?

A: Forged steel and cast steel are two different manufacturing processes with significant differences: (1) Manufacturing process: Forged steel - heated steel billet is shaped by compressive forces (hammering/pressing) to align the grain structure; Cast steel - molten steel is poured into a mold and solidifies. (2) Grain structure: Forging aligns the grain flow to follow the contour of the part - maximizing strength in the direction of stress; casting has random, isotropic grain structure - weaker in some directions. (3) Internal defects: Forging eliminates porosity, shrinkage, inclusions, and sand holes - common in castings; forged parts have a dense, uniform microstructure with no internal voids. (4) Mechanical properties: Forged steel has higher tensile strength, yield strength, impact toughness, and fatigue resistance - typically 10–30% stronger than cast of the same material; especially superior under cyclic loading and impact. (5) Pressure/temperature capability: Forged valves are standard for high-pressure (Class 600+) and critical service - cast valves are more common for lower pressure (Class 150–300) and larger sizes. (6) Size range: Forged valves are typically small-bore (NPS 1/4"–2", per API 602) - forging larger sizes is expensive; cast valves are available in all sizes (NPS 1/2"–48"+). (7) Cost: Forged valves are more expensive per unit (due to higher material utilization and forging tooling) but offer superior reliability; cast valves are more economical for large sizes and general service. Why choose forged: For critical, high-pressure, high-temperature, small-bore service where failure is not acceptable - oil & gas transmission, power plant steam, chemical process, high-pressure hydraulic - forged steel provides unmatched reliability and safety. The absence of internal defects means no hidden leak paths - critical for hazardous media. For general service, larger sizes, lower pressure - cast steel is adequate and more economical. This product (API 602 forged steel globe valve, NPS 1/4"–2", Class 150–2500) is specifically designed for the small-bore high-pressure critical service segment where forging is the standard.

Q2: What forged steel materials are available (A105, F304/F316/F304L/F316L, F11/F22), and how do I select?

A: Available body materials (all forged per ASTM A182 / A105): (1) ASTM A105 - carbon steel forging, general service, -29~425℃, most common and economical, for water/steam/oil/gas; (2) A182 F304 (1.4301) - 18Cr-8Ni stainless, general corrosive, nitric acid, oxidizing, -196~425℃; (3) A182 F316 (1.4401) - 16Cr-10Ni-2Mo stainless, improved pitting/crevice resistance in chloride (seawater, chemicals), acetic acid, urea, -196~450℃; (4) A182 F304L - low-carbon 304 (C≤0.035%), improved weldability and intergranular corrosion resistance, for welded critical service; (5) A182 F316L - low-carbon 316, superior corrosion + weldability, for sanitary/pharma/critical corrosive; (6) A182 F11 - 1.25Cr-0.5Mo alloy steel, high-temperature service to 550℃, power plant steam, hydrogen service; (7) A182 F22 - 2.25Cr-1Mo alloy steel, higher temperature than F11 (to 590℃), high-pressure high-temperature steam, refinery hydrogen service. Selection guide: general water/steam/oil → A105; corrosive/chemical/nitric → F304; chloride/seawater/acetic/urea/pharma → F316; welded critical corrosive/sanitary → F304L/F316L; high-temp steam >425℃ (power/refinery) → F11/F22; cryogenic (<-29℃) → F304/F316 with extended bonnet (austenitic stainless retains toughness to -196℃). Trim (internal): disc/stem typically A276 410 (hardenable stainless) or F304/F316 (corrosion-resistant); seat hardfaced with Stellite (cobalt-chromium) for wear/erosion resistance. All materials come with MTR EN 10204 3.1 and heat traceability. For special materials (F91/F92, Inconel, Monel, 254SMO, etc.) - consult factory for custom options.

Q3: What bonnet designs are available (bolted/welded/pressure seal), and which to choose for pressure?

A: Three bonnet designs available: (1) Bolted bonnet - bonnet attached to body by bolts, with a male-female (tongue-and-groove) joint and spiral-wound gasket (graphite/stainless or SS+PTFE). Advantages: easy to disassemble for maintenance (just unbolt), gasket is replaceable, suitable for most general service. Limitations: at very high pressure (Class 900+), bolts become very large and the flange joint can leak; gasket is a potential leak point. Typical use: Class 150–600, general service, where maintenance access is needed. (2) Welded bonnet - bonnet is threaded into the body and then seal-welded around the joint. Advantages: permanent, leak-free bonnet joint - no gasket to fail, ideal for hazardous/toxic media and high pressure where bonnet leakage is unacceptable; more compact than bolted. Limitations: requires cutting the seal weld to open for maintenance - more involved, but still serviceable. Typical use: Class 600–1500, hazardous chemicals, toxic gases, nuclear service. (3) Pressure seal bonnet - bonnet is threaded into the body with a pressure seal gasket (soft iron or silver) - the internal system pressure pushes the gasket upward, energizing the seal (higher pressure = tighter seal). Advantages: ideal for very high pressure (Class 900–2500) - no need for enormous bolts; compact, lightweight, reliable at ultra-high pressure. Limitations: requires unthreading the bonnet for maintenance (more complex), not suitable for vacuum service (pressure seal needs internal pressure to seal). Typical use: Class 900–2500, high-pressure boiler feedwater, main steam, high-pressure transmission. Selection guide: Class 150–600 general → bolted bonnet (most common, easy maintenance); Class 600–1500 hazardous → welded bonnet (leak-free); Class 900–2500 ultra-high pressure → pressure seal bonnet. All three are available with OS&Y (outside screw and yoke) stem design. The bonnet type affects face-to-face dimension and weight - pressure seal is most compact for high pressure. Provide your pressure class, media, and maintenance requirements for a precise recommendation.

Q4: What end connections are available (flange/SW/BW/thread), and how to choose for small-bore high-pressure?

A: Available end connections: (1) Flange (ASME B16.5) - raised face (RF) standard, flat face (FF) optional; most common, easy installation/removal for maintenance, compatible with standard flanges worldwide; use for general process where valve may need removal; for NPS 1/2"–2" (flanges available for all sizes in this range). (2) Socket Weld (ASME B16.11) - pipe end inserts into socket and fillet-welded around the outside; very common for small-bore (NPS≤2") high-pressure piping - strong, leak-free, compact, no flange gasket; use for high-pressure (Class 600+) small-bore process, instrument lines, oilfield; requires qualified welder, not easily removable. (3) Butt Weld (ASME B16.25) - valve end beveled and welded directly to pipe (butt joint); strongest, most leak-free, for high-pressure/high-temperature/hazardous; use for Class 900+ critical service, steam, hazardous chemicals; requires qualified welder and post-weld NDE, not removable. (4) Threaded (ASME B1.20.1 NPT) - male/female NPT threads, screwed connection; for small-bore (NPS≤2") low-to-medium pressure, instrument air, hydraulic, small process; easy installation but not for high pressure/temperature or cyclic service (thread can leak/gall); use sealant/tape. Selection for small-bore high-pressure: This valve (NPS 1/4"–2") is commonly used in small-bore high-pressure service - socket weld is the most popular for Class 600–1500 small-bore process (strong, compact, economical); butt weld for Class 1500–2500 ultra-high pressure critical; flange for general Class 150–300 where maintenance access is needed; threaded for low-pressure instrument/hydraulic. Note: socket weld is not recommended for NPS>2" or cyclic service (fatigue at fillet weld); butt weld preferred for larger/higher cyclic. Provide your piping code (ASME B31.1/B31.3), pressure, and media for connection recommendation. All connections per applicable ASME standards - ensuring interchangeability.

Q5: What is the pressure/temperature range, and what testing/certifications are provided?

A: Range: Size NPS 1/4"–2" (DN8–DN50). Pressure: ASME Class 150/300/600/900/1500/2500 (PN16–PN420). Temperature: -29℃~+550℃ (depends on material - A105 carbon to 425℃, F11/F22 alloy to 550℃+, F304/F316 stainless to 425℃ continuous; cryogenic option to -196℃ with extended bonnet). Testing: Every valve undergoes: (a) Shell strength test - hydrostatic at 1.5× nominal pressure per API 598 / BS EN 12266 Part 1 - no leakage, no deformation, no sweating; (b) Seat leakage test - hydrostatic at 1.1× nominal pressure - zero visible leakage for metal seats (per API 598); (c) Functional test - full open/close stroke, smooth operation, no binding; (d) Dimensional inspection - end connection, face-to-face, bore; (e) Material verification - MTR, heat number, PMI (positive material identification) optional; (f) NDE - UT/MT on forgings (standard), RT on welds (optional). Standards: Design - API 602 (compact steel gate/globe/check valves for petroleum/natural gas), ASME B16.34 (valves pressure-temperature rating), BS 5352 (British forged steel valves), EN ISO 15761 (European steel globe/gate/check valves), JB/T 7746 (Chinese forged steel valves). Test - API 598, BS EN 12266 Part 1. Marking: MSS SP25 - SS304 laser-engraved nameplate with material, size, pressure, design standard, serial, heat number, flow arrow. Certifications: ISO 9001:2015, CE (PED optional), material MTR EN 10204 3.1, API 602 compliant, TS (China pressure pipeline, optional). Documentation: MTR, hydrotest report, operating/maintenance manual, certificate of conformity. Commercial: Lead time 25–45 days standard, custom 40–60 days; MOQ 1 pc; T/T 30% deposit + 70% before shipment, L/C at sight for large orders; warranty 18 months from shipment. OEM/ODM available (custom material/size/logo/packaging). Exported to Europe, North America, Southeast Asia, Middle East - trusted by global industrial customers.

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