{"product_id":"nipple-black","title":"All Black Pipe","description":"\u003cbody\u003e\n\n\n\u003cmeta charset=\"UTF-8\"\u003e\n\u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\n\u003ctitle\u003eBlack Steel Schedule 40 Pipe Nipples | 1\/4\" to 1\" | Multiple Lengths\u003c\/title\u003e\n\u003cstyle\u003e\n  .product-section { max-width: 100%; margin: 2rem 0; font-family: Arial, sans-serif; color: #333; }\n  .accordion-item { border-bottom: 1px solid #ddd; }\n  .accordion-header { display: flex; justify-content: space-between; padding: 2rem 0; cursor: pointer; background: none; border: none; width: 100%; text-align: left; color: #333; }\n  .accordion-header:hover, .accordion-header:focus { color: #333; background: none; outline: none; }\n  .accordion-title { font-size: 1.5rem; font-weight: 500; }\n  .accordion-icon { font-size: 1.5rem; }\n  .accordion-item.active .accordion-icon { transform: rotate(180deg); }\n  .accordion-content { max-height: 0; overflow: hidden; }\n  .accordion-item.active .accordion-content { max-height: none; }\n  .accordion-content-inner { font-size: 1.4rem; line-height: 1.7; color: #555; padding-bottom: 2rem; }\n  .accordion-content-inner p { margin: 0 0 1rem 0; }\n  .accordion-content-inner ul { margin: 0 0 1rem 0; padding-left: 2rem; }\n  .accordion-content-inner li { margin-bottom: 0.4rem; }\n  .accordion-content-inner h3 { font-size: 1.4rem; font-weight: 600; color: #333; margin: 1.5rem 0 0.5rem 0; }\n  .specs-table { width: 100%; border-collapse: collapse; }\n  .specs-table th, .specs-table td { border: 1px solid #ddd; padding: 0.75rem 1rem; font-size: 1.4rem; text-align: left; }\n  .specs-table th { background-color: #f5f5f5; font-weight: 600; color: #333; }\n\u003c\/style\u003e\n\n\n\u003cdiv class=\"product-section\"\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\"\u003e\u003cspan class=\"accordion-title\"\u003eProduct Overview\u003c\/span\u003e\u003cspan class=\"accordion-icon\"\u003e⌄\u003c\/span\u003e\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\u003cdiv class=\"accordion-content-inner\"\u003e\n      \u003cp\u003eThese are black steel Schedule 40 pipe nipples: the short threaded connectors used to join sections of fire suppression system distribution piping, gas lines, and industrial fluid systems. A nipple is simply a short length of pipe with male NPT threads on both ends, used to connect two female-threaded fittings or to bridge a small gap in a piping run. In commercial kitchen fire suppression system installations, black steel nipples are the standard connection hardware for ANSUL R-102, Piranha, Range Guard, and other suppression system distribution piping networks.\u003c\/p\u003e\n      \u003cp\u003eSelect your pipe diameter and length from the dropdown. All nipples are Schedule 40 carbon steel construction, welded and threaded to ANSI\/ASME B1.20.1 NPT standards, and finished with a black varnish coating that resists surface oxidation. Material meets ASTM A-53 \/ A-733 specifications. Compatible with all standard black iron fittings, elbows, tees, and couplings used in fire suppression system piping.\u003c\/p\u003e\n    \u003c\/div\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\"\u003e\u003cspan class=\"accordion-title\"\u003eSize Selection Guide\u003c\/span\u003e\u003cspan class=\"accordion-icon\"\u003e⌄\u003c\/span\u003e\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\u003cdiv class=\"accordion-content-inner\"\u003e\n      \u003ctable class=\"specs-table\"\u003e\n        \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDiameter\u003c\/th\u003e\n\u003cth\u003eCommon Use in Fire Suppression\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003e1\/4 inch\u003c\/td\u003e\n\u003ctd\u003eSmall-bore actuation and pilot lines\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e3\/8 inch\u003c\/td\u003e\n\u003ctd\u003eANSUL R-102, Range Guard, and Piranha distribution piping, the most common size for kitchen suppression system nozzle branch lines\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e1\/2 inch\u003c\/td\u003e\n\u003ctd\u003eDistribution headers and larger branch runs in multi-nozzle configurations\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e3\/4 inch\u003c\/td\u003e\n\u003ctd\u003eMain distribution supply lines and gas piping connections\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e1 inch\u003c\/td\u003e\n\u003ctd\u003eHigh-flow distribution mains and larger gas line connections\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e1-1\/4 inch\u003c\/td\u003e\n\u003ctd\u003eLarge system mains and commercial gas line applications\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n      \u003cp\u003eLength options range from close nipples (the shortest possible, just enough thread for a fitting on each end) through 1-1\/2\", 2\", 2-1\/2\", 3\", 3-1\/2\", 4\", 4-1\/2\", 5\", 5-1\/2\", and 6\" lengths. Select the length needed to bridge the specific gap in your piping run, when in doubt, measure the distance between the two fittings before ordering.\u003c\/p\u003e\n    \u003c\/div\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\"\u003e\u003cspan class=\"accordion-title\"\u003eTechnical Specifications\u003c\/span\u003e\u003cspan class=\"accordion-icon\"\u003e⌄\u003c\/span\u003e\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\u003cdiv class=\"accordion-content-inner\"\u003e\n      \u003ctable class=\"specs-table\"\u003e\n        \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eCarbon steel, welded and threaded\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSchedule\u003c\/td\u003e\n\u003ctd\u003eSchedule 40\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eThread Standard\u003c\/td\u003e\n\u003ctd\u003eANSI\/ASME B1.20.1 NPT (National Pipe Taper)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMaterial Standard\u003c\/td\u003e\n\u003ctd\u003eASTM A-53 \/ A-733\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eBlack varnish, surface oxidation resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eEnds\u003c\/td\u003e\n\u003ctd\u003eMale NPT both ends\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eFire suppression distribution piping, gas lines (LP and natural), steam, oil, industrial fluid systems\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\"\u003e\u003cspan class=\"accordion-title\"\u003eFAQ\u003c\/span\u003e\u003cspan class=\"accordion-icon\"\u003e⌄\u003c\/span\u003e\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\u003cdiv class=\"accordion-content-inner\"\u003e\n      \u003ch3\u003eCan these be used for fire suppression system distribution piping?\u003c\/h3\u003e\n      \u003cp\u003eYes. Black steel Schedule 40 pipe nipples are the standard material for ANSUL R-102, Piranha, Range Guard, and other commercial kitchen fire suppression system distribution piping. Verify the correct pipe size for your specific system using the system design documentation, most R-102 and Range Guard nozzle branch runs use 3\/8-inch pipe. All piping installation must be performed by a licensed fire suppression contractor following the system design documentation and applicable NFPA standards.\u003c\/p\u003e\n      \u003ch3\u003eWhat is the difference between a close nipple and a short nipple?\u003c\/h3\u003e\n      \u003cp\u003eA close nipple has threads running almost the full length with only a very short unthreaded center, the minimum length that can be manufactured with full threads on both ends. A short nipple has a slightly longer unthreaded center, making it easier to grip with a wrench during installation. For tight-clearance applications in suppression system piping, close nipples are often necessary. For general connections with adequate working clearance, short nipples are easier to install and remove during service.\u003c\/p\u003e\n    \u003c\/div\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  document.querySelectorAll('.accordion-header').forEach(h =\u003e h.addEventListener('click', function() { this.parentElement.classList.toggle('active'); }));\n});\n\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Black Steel Schedule 40 Pipe Nipples | 1\/4\\\" to 1\\\" | Multiple Lengths\",\n  \"description\": \"Black steel Schedule 40 pipe nipples for fire suppression distribution piping, gas lines, and industrial applications. ASTM A-53\/A-733, ANSI\/ASME B1.20.1 NPT threads. Available in 1\/4\\\" to 1-1\/4\\\" diameters, close through 6\\\" lengths. 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