{"id":18659,"date":"2026-05-25T00:56:17","date_gmt":"2026-05-25T00:56:17","guid":{"rendered":"https:\/\/oudianvalve.com\/?post_type=product&#038;p=18659"},"modified":"2026-05-25T01:04:32","modified_gmt":"2026-05-25T01:04:32","slug":"c4-globe-valves-api600-150lb-rf-end","status":"publish","type":"product","link":"https:\/\/oudianvalve.com\/pt\/products\/globe-valves\/c4-globe-valves-api600-150lb-rf-end\/","title":{"rendered":"C4 Globe Valves,API600,150LB,RF End"},"content":{"rendered":"<ul>\n<li><strong>Product<\/strong>: 150LB C4 Globe Valve<\/li>\n<li><strong>Pressure Class<\/strong>: ANSI 150LB (\u22482.0 MPa)<\/li>\n<li><strong>Nominal Size<\/strong>: 4 inch (DN100)<\/li>\n<li><strong>Type<\/strong>: Globe Valve \u2014 linear motion valve for regulating, throttling, or shutting off flow, good for precise control.<\/li>\n<\/ul>\n<h3>Key Specifications<\/h3>\n<div><\/div>\n<ul>\n<li><strong>Design Standard<\/strong>: ASME B16.34, API 6D, BS 1873<\/li>\n<li><strong>Face-to-Face<\/strong>: ASME B16.10<\/li>\n<li><strong>Connection<\/strong>: Flanged (ASME B16.5 RF) or threaded<\/li>\n<li><strong>Material do corpo<\/strong>: Common \u2014 WCB carbon steel, CF8\/CF8M stainless steel, bronze, cast iron<\/li>\n<li><strong>Trim<\/strong>: Stainless steel, Stellite hard-faced<\/li>\n<li><strong>Faixa de temperatura<\/strong>: -29\u00b0C ~ +425\u00b0C (carbon steel); -40\u00b0C ~ +200\u00b0C (stainless steel)<\/li>\n<li><strong>Test Pressure<\/strong>: Shell \u2014 3.0 MPa; Seat \u2014 2.2 MPa (per API 598)<\/li>\n<li><strong>Opera\u00e7\u00e3o<\/strong>: Handwheel (standard), gearbox, pneumatic\/electric actuator available<\/li>\n<\/ul>\n<div><\/div>\n<h3>Aplica\u00e7\u00f5es<\/h3>\n<div><\/div>\n<ul>\n<li>Used in pipelines for water, steam, oil, gas, and general chemicals<\/li>\n<li>Suitable for systems requiring frequent regulation or tight shutoff<\/li>\n<li>Common in oil &amp; gas, power plants, chemical, and process industries<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>C4 steel globe valve (00Cr14Ni14Si4) is an ideal type of high silicon ultra-low carbon nitric acid resistant stainless steel, especially suitable for use in concentrated nitric acid media, and also resistant to corrosion from various concentrated nitric acid and sulfuric acid mixed acids<br \/>\nOnce the valve disc of the C4 steel globe valve is moved away from the closed position, there is no longer contact between its valve seat and the sealing surface of the valve disc. Therefore, the mechanical wear of its sealing surface is very small, and its sealing performance is very good. The disadvantage is that particles in the flowing medium may be trapped between the sealing surfaces. However, if the valve disc is made into steel balls or ceramic balls, this problem can be solved with toughness.<br \/>\nThe valve seat and disc of C4 steel globe valve are relatively easy to repair or replace, and there is no need to disassemble the entire valve from the pipeline when repairing or replacing the sealing element. This is very suitable for situations where the valve and pipeline are welded together.<br \/>\nC4 steel globe valve has the following advantages:<br \/>\nThere is no knife edge corrosion after welding, and it has good resistance to small hole corrosion and excellent resistance to stress corrosion;<br \/>\nC4 steel has good plasticity and toughness, which increases safety and reliability, and avoids the danger of industrial pure titanium igniting and exploding in nitric acid;<br \/>\nC4 steel has much better corrosion resistance than high-purity aluminum, and has mechanical properties that high silicon cast iron cannot match. Its welded joints have mechanical properties and corrosion resistance comparable to the base material.<br \/>\nThe use of C4 steel in pipelines, valves, condensers, pumps, and other equipment for the indirect method (magnesium nitrate method) of concentrated nitric acid is very effective.<br \/>\nThe material of C4 steel globe valve is 00Cr14Ni14Si4 ultra-low carbon austenitic stainless steel, which has excellent resistance to intergranular and stress corrosion cracking<\/p>\n<h1>FAQ: C4 Globe Valve<\/h1>\n<div><\/div>\n<div><strong>Alloy C4 (UNS N06455 \/ DIN 2.4610)<\/strong> is a nickel\u2011molybdenum\u2011chromium alloy, a refined version of Alloy C\u2011276 with lower carbon, silicon and iron content \u2014 offering exceptional stability and resistance to reducing and oxidizing media, widely used in the most severe chemical environments. Below is the complete FAQ covering material, design, selection, operation, maintenance and comparison.<\/div>\n<div>\n<h2>Material &amp; Core Properties<\/h2>\n<div><\/div>\n<div><strong>Q1: What is Alloy C4? How is it different from C\u2011276?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong><\/div>\n<div><\/div>\n<ul>\n<li>Alloy C4 = <strong>UNS N06455 \/ Werkstoff Nr. 2.4610<\/strong><\/li>\n<li>Composition: Ni balance, <strong>Mo 14\u201316%, Cr 14\u201318%, Fe \u22643%, Si \u22640.08%, C \u22640.01%<\/strong><\/li>\n<li>Compared to C\u2011276: Much lower carbon, silicon and iron \u2192 <strong>significantly improved thermal stability<\/strong>, much less risk of intermetallic precipitation (sigma phase) during welding or heat exposure; better resistance to intergranular corrosion; almost identical corrosion resistance in service, but <strong>far better fabricability and long\u2011term reliability<\/strong>.<\/li>\n<li>It is a solid\u2011solution strengthened nickel alloy, fully austenitic, non\u2011magnetic.<\/li>\n<\/ul>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<div><strong>Q2: What is the main corrosion advantage of C4?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong><\/p>\n<div><\/div>\n<p>\u2705 <strong>Universal resistance<\/strong> to both reducing AND oxidizing acids and mixtures \u2014 one of the few alloys stable in both environments<\/p>\n<div><\/div>\n<p>\u2705 Excellent resistance to <strong>hydrochloric acid<\/strong> (all concentrations, all temperatures up to boiling) \u2014 <em>this is its #1 strength<\/em><\/p>\n<div><\/div>\n<p>\u2705 Resistant to sulfuric, phosphoric, hydrofluoric, nitric, and mixed acids<\/p>\n<div><\/div>\n<p>\u2705 Resists chloride pitting, crevice corrosion and stress corrosion cracking completely<\/p>\n<div><\/div>\n<p>\u2705 Stable in wet chlorine, chlorine dioxide, hypochlorite, brines, and strong oxidizing salts<\/p>\n<div><\/div>\n<p>\u2705 Superior to C\u2011276, 904L, 2507, Alloy 20 in <strong>hot hydrochloric acid and mixed acid systems<\/strong><\/div>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<div><strong>Q3: What are the temperature and pressure limits?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong><\/div>\n<div><\/div>\n<ul>\n<li>Temperature range: <strong>\u2011196\u00b0C ~ +450\u00b0C<\/strong> continuous; short\u2011term up to 500\u00b0C\n<div><\/div>\n<p>\u2192 <em>Above 450\u00b0C, slight risk of precipitation; C\u2011276 better above 500\u00b0C<\/em><\/li>\n<li>Pressure class: <strong>150LB \u2013 2500LB \/ PN16 \u2013 PN160<\/strong><\/li>\n<li>Mechanical properties: Tensile \u2265690\u202fMPa, Yield \u2265280\u202fMPa \u2014 high strength, good for high\u2011pressure service<\/li>\n<li>\n<div><strong>Q4: How does C4 compare with 904L, Alloy 20, 2507, C\u2011276?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div>\n<table>\n<thead>\n<tr>\n<th>Alloy<\/th>\n<th>Best For<\/th>\n<th>C4 Comparison<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>904L<\/strong><\/td>\n<td>Dilute sulfuric \/ organic acids<\/td>\n<td>\u274c Far worse in HCl, mixed acids, oxidizers<\/td>\n<\/tr>\n<tr>\n<td><strong>Alloy 20<\/strong><\/td>\n<td>Sulfuric acid<\/td>\n<td>\u274c Not suitable for HCl \/ oxidizing mixes<\/td>\n<\/tr>\n<tr>\n<td><strong>2507<\/strong><\/td>\n<td>Seawater \/ high chloride<\/td>\n<td>\u274c Fails rapidly in reducing acids \/ HCl<\/td>\n<\/tr>\n<tr>\n<td><strong>C\u2011276<\/strong><\/td>\n<td>Extreme high\u2011temp \/ complex media<\/td>\n<td>\u26a0\ufe0f Similar corrosion resistance; <strong>C4 better thermal stability &amp; weldability<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>C4<\/strong><\/td>\n<td><strong>Hydrochloric acid, mixed acids, oxidizing + reducing combinations, wet chlorine<\/strong><\/td>\n<td>\u2705 <strong>Best choice here<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div><strong>Q5: What media is C4 NOT recommended for?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong><\/p>\n<div><\/div>\n<p>\u274c Fuming nitric acid or very strong oxidizers at high temperature (use C\u2011276 \/ 625 instead)<\/p>\n<div><\/div>\n<p>\u274c Molten alkalis or high\u2011temperature halide salts above 500\u00b0C<\/p>\n<div><\/div>\n<p>\u274c Cost\u2011sensitive general service (too expensive \u2014 use 316L \/ 904L)<\/p><\/div>\n<div><\/div>\n<\/blockquote>\n<div>\n<h2>Design &amp; Specification \u2014 150LB C4 Globe Valve<\/h2>\n<div><\/div>\n<div><strong>Q6: What are the standard codes and specifications?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong><\/div>\n<div><\/div>\n<ul>\n<li>Design: <strong>ASME B16.34, API 6D, BS\u202f1873, ISO\u202f10434<\/strong><\/li>\n<li>Pressure Class: <strong>150LB<\/strong> (2.0\u202fMPa) \u2014 also available 300LB, 600LB<\/li>\n<li>Face\u2011to\u2011Face: <strong>ASME B16.10<\/strong><\/li>\n<li>Flange Ends: <strong>ASME B16.5 RF \/ RTJ<\/strong><\/li>\n<li>Material Spec: <strong>ASTM B574 (bar), B564 (forging), B472 (casting)<\/strong><\/li>\n<li>Test &amp; Inspection: <strong>API\u202f598, ISO\u202f5208<\/strong> \u2014 leakage rate A (zero leakage optional)<\/li>\n<\/ul>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<div><strong>Q7: What is the standard model and construction?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong><\/div>\n<div><\/div>\n<ul>\n<li>Model: <strong>J41W\u2011150LB\u2011C4<\/strong> (straight\u2011through flanged globe valve)<\/li>\n<li>Bonnet: Bolted bonnet (BB) standard; pressure\u2011seal bonnet for \u2265Class\u202f600<\/li>\n<li>Stem: Outside Screw &amp; Yoke (OS&amp;Y), fully exposed, easy maintenance<\/li>\n<li>Body: Cast or forged Alloy C4<\/li>\n<li>Trim: <strong>Alloy C4 (solid) or Stellite\u202f6 hardfaced<\/strong> (standard trim #5)<\/li>\n<li>Seal: Metal\u2011to\u2011metal; soft seal (PTFE\/FFKM) available \u2264\u202f200\u00b0C<\/li>\n<li>Connection: Flanged RF (Class\u202f150) is most common; butt\u2011weld optional<\/li>\n<\/ul>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<div><strong>Q8: What is the recommended bill of material (BOM)?<\/strong><\/div>\n<div>\n<table>\n<thead>\n<tr>\n<th>Part<\/th>\n<th>Material<\/th>\n<th>Note<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Body \/ Bonnet<\/td>\n<td><strong>Alloy C4 (UNS N06455)<\/strong><\/td>\n<td>Cast A494 N\u201140M or forged B564<\/td>\n<\/tr>\n<tr>\n<td>Disc \/ Stem \/ Seat<\/td>\n<td><strong>Alloy C4<\/strong><\/td>\n<td>Solid or hardfaced<\/td>\n<\/tr>\n<tr>\n<td>Gasket<\/td>\n<td><strong>Alloy C4 spiral wound + graphite<\/strong><\/td>\n<td>\u274c Do NOT use 316L gasket<\/td>\n<\/tr>\n<tr>\n<td>Packing<\/td>\n<td>Expanded graphite \/ PTFE \/ Kalrez\u00ae<\/td>\n<td>High\u2011purity grade<\/td>\n<\/tr>\n<tr>\n<td>Fasteners<\/td>\n<td><strong>Alloy C\u2011276 \/ Alloy 625 \/ Alloy C4<\/strong><\/td>\n<td>\u274c Carbon steel strictly forbidden \u2014 severe galvanic corrosion<\/td>\n<\/tr>\n<tr>\n<td>Bushing<\/td>\n<td>Alloy 625 \/ C4<\/td>\n<td>Anti\u2011galling properties<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div><strong>Q9: Why is Class\u202f150 the most popular for C4 globe valves?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong><\/div>\n<div><\/div>\n<ul>\n<li>Most severe corrosion processes operate at <strong>low\u2011to\u2011medium pressure<\/strong> (&lt;\u202f2\u202fMPa)<\/li>\n<li>Class\u202f150 is lighter, more economical, easier to install and maintain<\/li>\n<li>Alloy C4 has high strength \u2014 Class\u202f150 provides large safety margin<\/li>\n<li>Standard flange dimensions and gasket availability<\/li>\n<\/ul>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<hr \/>\n<div><\/div>\n<h2>\u2705 Selection &amp; Application<\/h2>\n<div><\/div>\n<div><strong>Q10: When must I choose C4 Globe Valve instead of other alloys?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong> Choose <strong>C4<\/strong> if your service is:<\/p>\n<div><\/div>\n<p>\u2705 <strong>Hydrochloric acid<\/strong> \u2014 any concentration, any temperature, including boiling<\/p>\n<div><\/div>\n<p>\u2705 <strong>Mixed acids<\/strong> (e.g. H\u2082SO\u2084\u202f+\u202fHCl, HNO\u2083\u202f+\u202fHF) \u2014 where single alloys fail<\/p>\n<div><\/div>\n<p>\u2705 <strong>Wet chlorine, chlorine dioxide, bleaching solutions, hypochlorite<\/strong><\/p>\n<div><\/div>\n<p>\u2705 <strong>Hot brines, chloride\u2011containing oxidizing media<\/strong><\/p>\n<div><\/div>\n<p>\u2705 Processes requiring <strong>frequent throttling \/ regulation<\/strong> in above environments<\/div>\n<div><\/div>\n<div>\u2705 <strong>Best application rule<\/strong>:<\/p>\n<div><\/div>\n<p><em>If 904L \/ Alloy\u202f20 \/ 2507 fail or are unstable \u2192 select C4<\/em><\/div>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<div><strong>Q11: Is globe valve the right design for Alloy C4?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong> <strong>YES \u2014 perfect match.<\/strong><\/div>\n<div><\/div>\n<ul>\n<li>Globe valve = <strong>best design for throttling, precise control, frequent adjustment<\/strong><\/li>\n<li>Alloy C4 = <strong>most corrosion\u2011resistant material for these severe media<\/strong><\/li>\n<li>Together = <strong>ultimate control solution for aggressive chemical processes<\/strong><\/li>\n<li>Gate\/ball valves are NOT suitable here due to poor control and higher wear in corrosive service<\/li>\n<\/ul>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<div><strong>Q12: Which industries use 150LB C4 globe valves?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong><\/div>\n<div><\/div>\n<ul>\n<li>\u2705 <strong>Chlor\u2011alkali industry<\/strong>: Brine electrolysis, wet chlorine, hypochlorite<\/li>\n<li>\u2705 <strong>Pharma &amp; Fine Chemicals<\/strong>: Hydrochloric acid reactions, chlorination processes<\/li>\n<li>\u2705 <strong>Pulp &amp; Paper<\/strong>: Bleach plants, chlorine dioxide generation<\/li>\n<li>\u2705 <strong>Pickling &amp; Metal Treatment<\/strong>: Mixed acids, hydrochloric acid regeneration<\/li>\n<li>\u2705 <strong>Agrochemicals<\/strong>: Herbicide\/pesticide synthesis, chlorination<\/li>\n<li>\u2705 <strong>Waste Treatment<\/strong>: Acid neutralization, flue gas scrubbing with mixed acids<\/li>\n<\/ul>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<hr \/>\n<div><\/div>\n<h2>\ud83d\udd27 Installation &amp; Operation<\/h2>\n<div><\/div>\n<div><strong>Q13: What are the critical installation rules?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong><\/div>\n<div><\/div>\n<ol>\n<li><strong>Flow direction<\/strong>: Always install with flow <strong>under the disc<\/strong> (arrow on body) \u2014 standard globe valve practice<\/li>\n<li><strong>Galvanic isolation<\/strong>: <strong>ABSOLUTELY NEVER connect directly to carbon steel.<\/strong> Use insulating gaskets, C4\/Alloy\u202f20 spool pieces or PTFE sleeves. C4 is a noble alloy; any contact with iron\/steel will cause rapid corrosion of the steel and contamination.<\/li>\n<li><strong>Welding<\/strong>: Use matching filler <strong>ERNiCrMo\u201143 \/ W.Nr.\u202f2.4610<\/strong>; low heat input; <strong>NO post\u2011weld heat treatment needed<\/strong> \u2014 <em>this is where C4 is better than C\u2011276<\/em><\/li>\n<li><strong>Contamination control<\/strong>: Keep away from carbon steel tools, wire brushes or grinding dust \u2014 iron contamination causes surface rust and reduces corrosion resistance<\/li>\n<li><strong>Torque<\/strong>: Tighten bolts evenly in cross\u2011pattern; C4 has lower thermal expansion than austenitic steels \u2014 check retorque after heat\u2011up<\/li>\n<\/ol>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<div><strong>Q14: Can it be used for throttling and frequent operation?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong> <strong>YES \u2014 this is its primary purpose.<\/strong><\/div>\n<div><\/div>\n<ul>\n<li>Excellent stability under high differential pressure<\/li>\n<li>Good resistance to erosion and cavitation<\/li>\n<li>For severe service \u0394P\u202f&gt;\u202f20\u202fbar \u2192 specify <strong>anti\u2011cavitation \/ multi\u2011stage trim<\/strong><\/li>\n<li>Operable 10,000+ cycles without degradation<\/li>\n<\/ul>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<div><strong>Q15: Is C4 galling\u2011prone? How to handle?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong> Like all nickel alloys, C4 has tendency to gall under metal\u2011to\u2011metal sliding.<\/p>\n<div><\/div>\n<p>\u2705 Solution: Use <strong>high\u2011purity graphite packing<\/strong>, smooth stem finish, and anti\u2011seize compound compatible with nickel alloys; avoid dry operation.<\/div>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<hr \/>\n<div><\/div>\n<h2>\ud83e\uddf9 Maintenance &amp; Troubleshooting<\/h2>\n<div><\/div>\n<div><strong>Q16: What is the expected service life?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong><\/div>\n<div><\/div>\n<ul>\n<li>Hydrochloric acid service: <strong>8\u201315\u202fyears<\/strong><\/li>\n<li>Mixed acids \/ oxidizing reducing mixtures: <strong>6\u201312\u202fyears<\/strong><\/li>\n<li>Far longer than 904L, Alloy\u202f20 or duplex; near\u2011perfect stability in proper conditions<\/li>\n<\/ul>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<div><strong>Q17: Why is there leakage after some time?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong><\/div>\n<div><\/div>\n<ul>\n<li>\u2705 <strong>Most common cause<\/strong>: Wrong gasket material (316L instead of C4) \u2192 corrosion of gasket \u2192 leakage<\/li>\n<li>\u2705 Second cause: Improper installation \/ uneven bolt load<\/li>\n<li>\u2705 Third: Solid particles trapped on seat \u2192 lapping required<\/li>\n<li>\u2705 <strong>True corrosion leakage is extremely rare<\/strong> if material is correctly selected<\/li>\n<\/ul>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<div><strong>Q18: Can I repair or reweld a C4 globe valve?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong> <strong>YES \u2014 very repairable.<\/strong><\/div>\n<div><\/div>\n<ul>\n<li>Weld repair: Use ERNiCrMo\u201143; no heat treatment required (big advantage over C\u2011276)<\/li>\n<li>Seats\/discs can be re\u2011lapped or re\u2011hardfaced with Stellite<\/li>\n<li>Stem can be re\u2011machined or coated<\/li>\n<li><strong>No loss of corrosion resistance after repair<\/strong> \u2014 unique benefit of C4<\/li>\n<\/ul>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<div><strong>Q19: Brown stains or discoloration \u2014 is it corrosion?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong> <strong>Almost always NOT corrosion.<\/strong><\/div>\n<div><\/div>\n<ul>\n<li>C4 does not corrode in correct service<\/li>\n<li>Stains = surface oxide film or iron contamination\n<div><\/div>\n<p>\u2705 Clean with nitric acid passivation or pickling paste \u2014 surface will restore to bright finish<\/li>\n<\/ul>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<div><strong>Q20: When to replace instead of repair?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong> Only if:<\/div>\n<div><\/div>\n<ul>\n<li>Wall thickness reduced below minimum by severe erosion<\/li>\n<li>Severe mechanical damage or crack<\/li>\n<li>Application changed to media outside C4 capability<\/li>\n<\/ul>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<hr \/>\n<div><\/div>\n<h2>\u2696\ufe0f Comparison &amp; Selection Summary<\/h2>\n<div><\/div>\n<div><strong>Q21: C4 vs C\u2011276 \u2014 which to pick?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong><\/div>\n<div><\/div>\n<ul>\n<li>\u2705 <strong>Choose C4<\/strong>: Hydrochloric acid, mixed acids, wet chlorine, welded fabrication required, temperature &lt;\u202f450\u00b0C \u2014 <strong>better stability, easier welding, same corrosion resistance<\/strong><\/li>\n<li>\u2705 <strong>Choose C\u2011276<\/strong>: Higher temperature &gt;\u202f450\u00b0C, fuming nitric acid, very complex mixed halides \u2014 better high\u2011temperature strength<\/li>\n<\/ul>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<div><strong>Q22: C4 vs Hastelloy B3?<\/strong><\/div>\n<div><\/div>\n<blockquote>\n<div><strong>A:<\/strong><\/div>\n<div><\/div>\n<ul>\n<li><strong>B3<\/strong>: Best for pure reducing acids (HCl, H\u2082SO\u2084) \u2014 fails in oxidizing conditions<\/li>\n<li><strong>C4<\/strong>: <strong>Stable in BOTH reducing AND oxidizing<\/strong> \u2014 universal choice\n<div><\/div>\n<p>\u2192 If oxidizing species present (air, Fe\u00b3\u207a, Cu\u00b2\u207a, chlorine) \u2192 <strong>C4 only<\/strong><\/li>\n<\/ul>\n<div><\/div>\n<\/blockquote>\n<div><\/div>\n<hr \/>\n<div><\/div>\n<div>\u2705 <strong>Final Recommendation<\/strong>:<\/p>\n<div><\/div>\n<p><strong>150LB C4 Globe Valve<\/strong> is the standard solution for low\u2011pressure severe corrosion service where hydrochloric acid, mixed acids or wet chlorine are present \u2014 unmatched performance, excelle<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/blockquote>\n<\/li>\n<\/ul>\n<\/blockquote>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>China C4 Globe Valve Supplier ,China C4 Globe Valve Manufacture,150LB C4 Globe Valve ,RF End C4 Globe Valve.<\/p>","protected":false},"featured_media":18660,"template":"","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false},"product_brand":[],"product_cat":[80],"product_tag":[712,711,710,713],"class_list":{"0":"post-18659","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-globe-valves","7":"product_tag-150lb-c4-globe-valve","8":"product_tag-china-c4-globe-valve-manufacture","9":"product_tag-china-c4-globe-valve-supplier","10":"product_tag-rf-end-c4-globe-valve","12":"first","13":"instock","14":"shipping-taxable","15":"product-type-simple"},"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/oudianvalve.com\/pt\/wp-json\/wp\/v2\/product\/18659","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oudianvalve.com\/pt\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/oudianvalve.com\/pt\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oudianvalve.com\/pt\/wp-json\/wp\/v2\/media\/18660"}],"wp:attachment":[{"href":"https:\/\/oudianvalve.com\/pt\/wp-json\/wp\/v2\/media?parent=18659"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/oudianvalve.com\/pt\/wp-json\/wp\/v2\/product_brand?post=18659"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/oudianvalve.com\/pt\/wp-json\/wp\/v2\/product_cat?post=18659"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/oudianvalve.com\/pt\/wp-json\/wp\/v2\/product_tag?post=18659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}