{"product_id":"stainless-steel-304-weld-nipple-bsp-threaded-pipe-fitting","title":"Stainless Steel 304 Weld Nipple Connector — BSP 1\/4\" to 4\" Threaded Pipe Fitting","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003c!-- ① OVERVIEW --\u003e\n\u003ch2\u003eStainless Steel BSP Weld Nipple Connector — Reliable Threaded Pipe Fitting for Plumbing \u0026amp; Industrial Use\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003cp\u003eWhen a leaking joint or a mismatched fitting brings your plumbing or process line to a halt, you need a connector you can trust. Fabricators, plumbers, and maintenance engineers working with BSP pipe systems often struggle to find weld nipples that combine a clean thread profile with a weldable body — especially across a wide size range. These Stainless Steel 304 Weld Nipple Connectors are built for exactly that job.\u003c\/p\u003e\n\u003cp\u003eEach piece is a single weld nipple machined from 304 stainless steel, available in BSP sizes from 1\/4\" (DN8) through 4\" (DN100). The threaded end conforms to BSP standards, while the plain end is prepared for butt welding directly to your pipe. Sizes span DN8 through DN100, covering the most common nominal bore diameters used in commercial and industrial piping.\u003c\/p\u003e\n\u003cp\u003eTypical applications include water supply and distribution lines, compressed air systems, food-processing equipment requiring sanitary-grade stainless connections, and light industrial gas lines. The BSP weld nipple connector is also widely used in HVAC chilled-water loops, chemical dosing systems, and marine deck fittings where corrosion resistance is a priority.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- ② COMPATIBILITY BAR --\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔗\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits standard BSP (British Standard Pipe) threaded systems — DN8 to DN100. Designed for butt-welding to Schedule 10 \/ Schedule 40 stainless steel pipe. \u003cstrong\u003eNot directly compatible with NPT threads\u003c\/strong\u003e without an adapter.\u003c\/div\u003e\n\u003c!-- ③ KEY FEATURES --\u003e\n\u003ch2\u003e✅ Key Features of These Stainless Steel BSP Weld Nipple Connectors\u003c\/h2\u003e\n\u003cul class=\"hdiy-features\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBSP-Standard Thread Profile\u003c\/strong\u003e — Machined to British Standard Pipe thread dimensions for a leak-free, consistent fit with BSP valves, unions, and fittings across DN8–DN100.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e304 Stainless Steel Construction\u003c\/strong\u003e — Resists rust, oxidation, and mild chemical exposure, making these weld nipple pipe fittings suitable for both indoor and outdoor installations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔥\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWeldable Plain End\u003c\/strong\u003e — The unwelded end is prepared for butt welding, allowing a permanent, full-penetration joint to your stainless steel pipe without reducing bore flow area.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWide Size Range in One Listing\u003c\/strong\u003e — Eleven BSP sizes from 1\/4\" (DN8) to 4\" (DN100) available as variants, so you can order the exact nominal bore you need without hunting across multiple listings.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏭\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSuitable for Food-Grade \u0026amp; Industrial Lines\u003c\/strong\u003e — 304 SS meets common food-contact material standards, making these threaded stainless fittings appropriate for food processing, beverage, and dairy piping where hygiene matters.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eConsistent Machined Finish\u003c\/strong\u003e — Each connector is machined to close tolerances, ensuring the thread engages smoothly and the weld prep end aligns concentrically with your pipe for a strong, even weld bead.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ④ TECHNICAL SPECIFICATIONS --\u003e\n\u003ch2\u003e📐 Technical Specifications — BSP Stainless Steel Weld Nipple Fittings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eStainless Steel 304 (SS304)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eBSP (British Standard Pipe)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Sizes\u003c\/th\u003e\n\u003ctd\u003eBSP 1\/4\" (DN8) · 3\/8\" (DN10) · 1\/2\" (DN15) · 3\/4\" (DN20) · 1\" (DN25) · 1-1\/4\" (DN32) · 1-1\/2\" (DN40) · 2\" (DN50) · 2-1\/2\" (DN65) · 3\" (DN80) · 4\" (DN100)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEnd Types\u003c\/th\u003e\n\u003ctd\u003eOne BSP threaded end + one plain (weld) end\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Pipe Schedule\u003c\/th\u003e\n\u003ctd\u003eTypically Schedule 10 \/ Schedule 40 stainless steel pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eMill \/ machined (natural stainless)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePressure Rating\u003c\/th\u003e\n\u003ctd\u003eSee variant options — generally up to 150 PSI for standard schedule; confirm with your engineer for critical applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTemperature Range\u003c\/th\u003e\n\u003ctd\u003eSuitable for cryogenic to approx. 870°C (1600°F) intermittent service typical of 304 SS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 piece per unit (multi-piece orders: select quantity at checkout)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCertifications \/ Standards\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm — manufactured to BSP dimensional standards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eSizing note:\u003c\/strong\u003e BSP sizes refer to nominal bore, not actual outer diameter. Always verify your pipe's DN\/nominal size before ordering. If unsure, contact us with your pipe's OD measurement.\u003c\/div\u003e\n\u003c!-- ⑤ FAQ --\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right BSP weld nipple size?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the BSP size to your pipe's nominal bore (DN number). BSP sizing refers to the bore, not the outer diameter. For example, a BSP 1\/2\" (DN15) fitting typically has an outer thread diameter of around 20.9 mm (≈0.825\"). A BSP 1\" (DN25) is typically 33.2 mm (≈1.31\") OD at the thread. Always measure your existing pipe thread or check your system's nominal pipe size before ordering. When in doubt, order one size and test-fit before committing to a larger quantity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat pressure can these weld nipple connectors handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eStainless steel 304 weld nipples generally handle working pressures up to 150 PSI for standard schedule pipe applications. Actual ratings depend on wall thickness, operating temperature, and the quality of the welded joint. For high-pressure steam, gas, or process lines, consult a licensed engineer and verify against your system's design pressure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these fittings be used outdoors or in corrosive environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. 304 stainless steel offers good resistance to atmospheric corrosion, moisture, and many mild chemicals, making it suitable for outdoor plumbing, food-grade installations, and light industrial environments. For highly chlorinated water, saltwater, or marine environments, 316 stainless steel is generally recommended due to its higher molybdenum content.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these BSP or NPT thread fittings — and can I mix them?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese are BSP (British Standard Pipe) threaded fittings. BSP threads are not directly interchangeable with NPT (National Pipe Taper) threads used in North American plumbing. While some sizes may appear to engage, the thread angle and pitch differ, which can cause leaks or cross-threading. Use a BSP-to-NPT adapter if you need to connect to an NPT system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat welding method should I use for these weld nipples?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eTIG (GTAW) welding is generally recommended for stainless steel 304 weld nipples to preserve corrosion resistance and produce clean, strong joints. MIG welding is also used in less critical structural applications. Use a compatible 308L filler rod and back-purge with argon when welding food-grade, sanitary, or pressure-rated lines to prevent oxidation on the inside of the weld.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat pipe schedules are compatible with these fittings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese weld nipples are typically compatible with Schedule 10 and Schedule 40 stainless steel pipe in the corresponding DN sizes. The plain (weld) end is sized to match the pipe OD for the given nominal bore. Confirm the outer diameter of your pipe matches the fitting bore before welding, as wall thickness varies between schedules.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these for gas line installations?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eStainless steel 304 weld nipples are commonly used in natural gas and compressed gas distribution systems. However, gas line installations must comply with local building codes and regulations. Always have gas line work designed, installed, and inspected by a licensed professional. Contact us to confirm suitability for your specific gas application.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo you sell these in bulk quantities, or only single pieces?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eEach variant is listed as 1 piece. For bulk or project quantities, simply adjust the quantity at checkout. If you need a custom quote for large orders (typically 50+ pieces), contact us directly and we'll work out the best pricing for your project.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c!-- ⑥ CTA BAR --\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your size above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"BSP 1\u00264\" (DN8) \/ 1 pcs","offer_id":52336726966546,"sku":"PENG026659x1","price":4.2,"currency_code":"USD","in_stock":true},{"title":"BSP 3\u00268\" (DN10) \/ 1 pcs","offer_id":52336726999314,"sku":"PENG026660x1","price":5.1,"currency_code":"USD","in_stock":true},{"title":"BSP 1\u00262\" (DN15) \/ 1 pcs","offer_id":52336727032082,"sku":"PENG026661x1","price":6.24,"currency_code":"USD","in_stock":true},{"title":"BSP 3\u00264\" (DN20) \/ 1 pcs","offer_id":52336727064850,"sku":"PENG026662x1","price":8.42,"currency_code":"USD","in_stock":true},{"title":"BSP 1\" (DN25) \/ 1 pcs","offer_id":52336727097618,"sku":"PENG026663x1","price":11.14,"currency_code":"USD","in_stock":true},{"title":"BSP 1 1\u00264\" (DN32) \/ 1 pcs","offer_id":52336727130386,"sku":"PENG026664x1","price":13.45,"currency_code":"USD","in_stock":true},{"title":"BSP 1 1\u00262\" (DN40) \/ 1 pcs","offer_id":52336727163154,"sku":"PENG026665x1","price":16.31,"currency_code":"USD","in_stock":true},{"title":"BSP 2\" (DN50) \/ 1 pcs","offer_id":52336727195922,"sku":"PENG026666x1","price":21.42,"currency_code":"USD","in_stock":true},{"title":"BSP 2 1\u00262\" (DN65) \/ 1 pcs","offer_id":52336727228690,"sku":"PENG026667x1","price":29.58,"currency_code":"USD","in_stock":true},{"title":"BSP 3\" (DN80) \/ 1 pcs","offer_id":52336727261458,"sku":"PENG026668x1","price":36.03,"currency_code":"USD","in_stock":true},{"title":"BSP 4\" (DN100) \/ 1 pcs","offer_id":52336727294226,"sku":"PENG026669x1","price":48.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of16_cc145822-6c57-4ea4-9290-8957fecbbe31.jpg?v=1781155405","url":"https:\/\/homediyer.com\/products\/stainless-steel-304-weld-nipple-bsp-threaded-pipe-fitting","provider":"HomeDIYer","version":"1.0","type":"link"}