{"id":18382,"date":"2025-06-14T02:10:56","date_gmt":"2025-06-14T02:10:56","guid":{"rendered":"https:\/\/oudianvalve.com\/?post_type=product&p=18382"},"modified":"2025-06-14T02:18:24","modified_gmt":"2025-06-14T02:18:24","slug":"astm-a890-4a-ball-valve-150lb-2-inch-rf-end","status":"publish","type":"product","link":"https:\/\/oudianvalve.com\/ro\/products\/ball-valves\/astm-a890-4a-ball-valve-150lb-2-inch-rf-end\/","title":{"rendered":"Valv\u0103 cu bil\u0103 ASTM A890 4A, 150LB, 2 inch, cap\u0103t RF"},"content":{"rendered":"

Descrierea supapei:
\nTip supap\u0103: Supap\u0103 cu bil\u0103 plutitoare
\nMaterialul corpului: 2205.
\nDiametru nominal: DN80
\nPresiune nominal\u0103: PN25
\nConexiune final\u0103: Flan\u0219\u0103 RF
\nTemperatura de func\u021bionare: -29\u2103~+200\u2103.
\nFunc\u021bionare: P\u00e2rghie.<\/p>\n

ASTM A890 4A\u00a0 Ball Valve Product Analysis
\nI. Floating Structural Design and Functional Characteristics
\n4A American Standard Ball Valve adopts a floating flange connection structure. Its core design is based on the adaptive displacement of the ball under medium pressure, and the sealing is achieved by dynamically pressing the valve seat. This structure combines flexibility and reliability, and its specific features are as follows:<\/p>\n

Dynamic sealing mechanism: The ball moves toward the outlet valve seat under the thrust of the medium, forming a double sealing effect (metal + soft seal), which is suitable for high pressure difference environment, and the sealing level can reach level VI.<\/p>\n

Modular maintenance design: The valve seat and sealing ring adopt detachable modules, which can be replaced without removing the valve body, significantly reducing maintenance costs.<\/p>\n

Anti-interference performance optimization: An anti-blowout structure is added between the valve stem and the ball to prevent the valve stem from being detached due to the impact of high-pressure media, thereby improving safety.<\/p>\n

Low-torque operation: The combination of the floating ball and the PTFE (polytetrafluoroethylene) valve seat reduces the friction coefficient, reduces the manual operation torque by 30%, and makes the selection of electric\/pneumatic actuators more flexible.<\/p>\n

2. Comprehensive performance evaluation of 4A American standard ball valve
\nCore advantages:<\/p>\n

Adaptability to extreme environments: 4A duplex steel (corresponding to ASTM A995 Gr.4A or A890 Gr.4A) has both high strength and corrosion resistance through austenite-ferrite duplex structure, and its resistance to chloride stress corrosion is more than 5 times that of 304 stainless steel. It is suitable for seawater desalination, oil and gas field sulfur-containing media and other scenarios.<\/p>\n

Wide temperature range stability: The operating temperature covers -46\u2103 to 300\u2103, and the valve seat material can be enhanced PTFE or metal hard seal to meet the transportation needs of high-temperature steam and low-temperature liquefied natural gas (LNG).<\/p>\n

Fluid zero leakage guarantee: Passed the bidirectional sealing test of API 598 standard, the leakage rate is less than 0.1\u00d7DN mm\u00b3\/s, meeting the strict environmental protection requirements.<\/p>\n

Limitations:<\/p>\n

Cost sensitivity: The material cost of 4A duplex steel is about 40% higher than that of ordinary austenitic stainless steel, and the forging and heat treatment processes are complicated, resulting in a high overall valve cost.<\/p>\n

Installation accuracy requirements: The floating structure needs to strictly calibrate the pipe coaxiality. Deviations exceeding 0.5\u00b0 may cause uneven wear on the sealing surface.<\/p>\n

III. Material properties and mechanical parameters of 4A duplex steel
\nChemical composition (ASTM A995 Gr.4A):<\/p>\n

Cr (24-26%): forms a dense oxide film to resist pitting and crevice corrosion;<\/p>\n

Ni (6-8%): balances the austenite phase ratio and improves low-temperature toughness;<\/p>\n

Mo (3-4%): enhances resistance to reducing acid corrosion;<\/p>\n

N (0.2-0.3%): replaces part of the nickel element, optimizes cost and improves strength.<\/p>\n

Mechanical properties:<\/p>\n

Tensile strength: 820-930 MPa, better than 620 MPa of ordinary duplex steel (such as 2205);<\/p>\n

Yield strength: \u2265550 MPa, suitable for high-pressure pipeline systems;<\/p>\n

Impact toughness: Charpy V-notch impact energy \u226540 J at -46\u2103, suitable for extremely cold environments;<\/p>\n

Hardness control: HRC\u226432, to avoid brittle failure of the sealing surface.<\/p>\n

IV. Manufacturing standards and certification system
\nThe manufacturing of 4A American standard ball valves follows the following domestic and international standards to ensure reliability throughout the life cycle:<\/p>\n

Material specifications:<\/p>\n

ASTM A995\/A890: specifies casting composition and heat treatment process;<\/p>\n

ASTM A182 F51: Forging processing standards to ensure the strength of valve stems and balls.<\/p>\n

Structural design:<\/p>\n

API 6D\/API 608: defines valve size, pressure rating and test methods;<\/p>\n

ASME B16.34: Flange connection and pressure boundary design criteria.<\/p>\n

Test certification:<\/p>\n

ISO 5208: Sealing performance classification test;<\/p>\n

NACE MR0175: Hydrogen sulfide environment cracking resistance verification, suitable for acidic conditions in oil and gas fields.<\/p>\n

V. Application scenarios and selection recommendations
\n4A American standard ball valves are particularly outstanding in the following fields:<\/p>\n

Marine engineering: seawater cooling system, submarine pipeline, resistance to chloride ion corrosion and biological attachment;<\/p>\n

Chemical process: sulfuric acid and hydrochloric acid medium transportation, tolerance to strong acid environment with pH<2;<\/p>\n

Energy field: high-pressure wellhead control containing H\u2082S and CO\u2082 in shale gas extraction to prevent sulfide stress corrosion cracking (SSCC).<\/p>\n

Things to pay attention to when selecting:<\/p>\n

Sealing form: soft seal (PTFE) is suitable for clean media, hard seal (tungsten carbide) is used for fluids containing particles;<\/p>\n

Actuator matching: select pneumatic, electric or turbine drive according to pipeline pressure and response speed.<\/p>\n

VI. 4A American standard ball valve applicable pressure rating table<\/p>\n

IV. Domeniul de aplicare al robinetului cu bil\u0103 din titan cu flan\u0219\u0103<\/p>\n

Petrochimic: Aplicabil \u00een diverse conducte de materiale din industria petrolier\u0103, chimic\u0103, metalurgic\u0103 \u0219i alte industrii, cum ar fi medii acide, alcaline, la temperaturi ridicate, la presiune \u00eenalt\u0103 etc.
\nAerospa\u021bial: Aplicabil diverselor sisteme de conducte din domeniul aerospa\u021bial, cum ar fi sistemele hidraulice, sistemele de combustibil, sistemele pneumatice etc.
\nDezvoltare oceanic\u0103: Aplicabil diverselor sisteme de conducte media \u00een domeniul dezvolt\u0103rii oceanice, cum ar fi tratarea apei de mare, extrac\u021bia petrolului offshore etc.
\nProduc\u021bie medical\u0103: Aplicabil diverselor sisteme de conducte media din domeniul produc\u021biei medicale, cum ar fi fabricarea de echipamente, fermenta\u021bia biologic\u0103 etc.<\/p>\n

Tehnologie de presare izostatic\u0103 la cald, supap\u0103 cu bil\u0103 din titan, tabel de aplicare a calibrului de presiune<\/p>\n

Putem produce robinete cu bil\u0103 2205, robinete cu sertar 2205, robinete cu glob 2205, robinete de sens invers 2205 etc.<\/p>\n

6. Tabelul de presiune nominal\u0103 aplicabil pentru robinetul cu bil\u0103 ASTM A890 4A:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Presiunea nominal\u0103 sau nivelul presiunii<\/td>\n\u516c\u79f0\u901a\u5f84DN\/NPS\uff08mm\/in\uff09<\/td>\n<\/tr>\n
15<\/td>\n20<\/td>\n25<\/td>\n32<\/td>\n40<\/td>\n50<\/td>\n65<\/td>\n80<\/td>\n100<\/td>\n125<\/td>\n150<\/td>\n200<\/td>\n250<\/td>\n<\/tr>\n
1\/2<\/td>\n3\/4<\/td>\n1<\/td>\n11\/4<\/td>\n11\/2<\/td>\n2<\/td>\n21\/2<\/td>\n3<\/td>\n4<\/td>\n5<\/td>\n6<\/td>\n8<\/td>\n10<\/td>\n<\/tr>\n
PN16<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/tr>\n
PN25<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/tr>\n
PN40<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/tr>\n
PN63<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
PN100<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
PN160<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Clasa 150 (PN20)<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/tr>\n
Clasa 300 (PN50)<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/tr>\n
Clasa 600 (PN110)<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Clasa 900 (PN150)<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Clasa 1500\/PN260<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
JIS 10K<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/tr>\n
JIS 20K<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

China ASTM A890 4A Ball Valve Manufacturer ,OUdian Supplies ASTM A890 4A Floating Ball Valve, ASTM A890 4A \u00a0Floating Ball Valve, 2 Inch ASTM A890 4A Ball Valve, 150lb ASTM A890 4A\u00a0 Floating Ball Valve.<\/p>","protected":false},"excerpt":{"rendered":"

Standard de proiectare: API 6D\/API 608
\nProtec\u021bie \u00eempotriva incendiilor: API 607\/6FA
\nEvalu\u0103ri de temperatur\u0103 de presiune: ASME B16.34
\nInterval de dimensiuni: 2\u201d la 48\u201d (DN50-DN1200)
\nOrificiu: alezaj complet sau alezaj redus
\nInterval de presiune: 150LB p\u00e2n\u0103 la 2500LB
\nConexiuni la cap\u0103t: RF cu flan\u0219\u0103, RTJ, sudare cap la cap
\nTip bil\u0103: bil\u0103 solid\u0103 forjat\u0103
\nDimensiuni de cap\u0103t cu flan\u0219\u0103: ASME B16.5 (24\u201d \u0219i mai jos), ASME B16.47 Seria A sau B (peste 24\u201d)
\nDimensiuni cap\u0103t de sudare cap la cap: ASME B16.25
\nDimensiuni fa\u021b\u0103 \u00een fa\u021b\u0103: ASME B16.10
\nInspec\u021bie \u0219i testare: API 6D
\nMateriale caroserie: A105\/A105N, F304, F316, F316L, F51, F53, F55, C95800, UNS N08825, UNS N06625.
\nMateriale scaun: PTFE, RPTFE, DEVLON, NYLON, PEEK, metal asezat cu TCC\/STL\/Ni.<\/p>","protected":false},"featured_media":18383,"template":"","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false},"product_brand":[],"product_cat":[83],"product_tag":[397,396,395,393,394],"class_list":{"0":"post-18382","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ball-valves","7":"product_tag-150lb-astm-a890-4a-floating-ball-valve","8":"product_tag-2-inch-astm-a890-4a-ball-valve","9":"product_tag-astm-a890-4a-floating-ball-valve","10":"product_tag-china-astm-a890-4a-ball-valve-manufacturer","11":"product_tag-oudian-supplies-astm-a890-4a-floating-ball-valve","13":"first","14":"instock","15":"shipping-taxable","16":"product-type-simple"},"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/oudianvalve.com\/ro\/wp-json\/wp\/v2\/product\/18382","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oudianvalve.com\/ro\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/oudianvalve.com\/ro\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oudianvalve.com\/ro\/wp-json\/wp\/v2\/media\/18383"}],"wp:attachment":[{"href":"https:\/\/oudianvalve.com\/ro\/wp-json\/wp\/v2\/media?parent=18382"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/oudianvalve.com\/ro\/wp-json\/wp\/v2\/product_brand?post=18382"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/oudianvalve.com\/ro\/wp-json\/wp\/v2\/product_cat?post=18382"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/oudianvalve.com\/ro\/wp-json\/wp\/v2\/product_tag?post=18382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}