Short pipe branch outlet

Overview

The Nipolet (short-pipe branch outlet) is an integrally forged, extended-type branch outlet fitting with built-in equal-area reinforcement. Its body extends upward into an extended straight pipe section, forming an integrated forged short-pipe branch structure; the saddle surface at the bottom is fillet-welded and fixed to the outer wall of the main pipe, and the branch end extends outward for a certain length. Compared with conventional 90° short-type WOL/SOL/TOL branch outlets, it comes from the factory with a standard extended straight pipe, so no additional short nipple needs to be welded on site; the outlet point is completed in one step, reducing one field butt weld. It complies with MSS SP-97, ASME B16.11, and GB/T19326; main pipe NPS2-NPS48, branch NPS1/8-NPS4, pressure ratings 3000LB and 6000LB, standard extension length 89-165mm, and pipe length can also be customized. The end is available in three forms: butt-weld bevel, socket bore, and external thread.

Key Features

First, it is integrally forged, with built-in equal-area reinforcement and an extended straight pipe section; no short nipple needs to be welded on site, reducing one butt weld and lowering the risk of leakage and cracking under high-pressure media. Second, the extended pipe section can directly pass through equipment insulation layers, cold insulation layers, and pipe rack protective structures, avoiding problems such as damage from insulation openings and exposed pipeline sections being too short to connect to valves. Third, it complies with the equal-area reinforcement specification of MSS SP-97, requires no additional reinforcement pad, and is integrally hot-forged with no spliced welds, giving a dense and uniform material structure. Fourth, the end can be selected in three forms: butt-weld bevel, socket bore, and external thread; the butt-weld type is used for permanent high-temperature and high-pressure discharge and vent main branches, the socket type is used for fixing remote transmission instruments and monitoring points, and the external thread type is used for direct screw connection of valves and plugs. Fifth, the pipe section lengths are standardized and uniform, ensuring complete insulation coverage, standardized valve exposure, and sufficient space for maintenance and disassembly.

Applications

The Nipolet (short-pipe branch outlet) is mainly used in working conditions involving high-pressure insulated pipelines, exposed valve manifolds, discharge and venting, reserved maintenance length, and prohibition of secondary welding. Specifically, these include: vent and drain points on high-pressure insulated process pipelines in petrochemicals, valve manifold outlet connections on steam insulated pipelines in thermal power plants, remote instrument branches on cold-insulated pipelines in coal chemical installations, pressure relief branches on high-pressure thick-wall natural gas pipelines, discharge points of anti-corrosion and insulation pipe networks on offshore platforms, and external branches in the narrow spaces of dense valve manifolds in industrial installations. It is especially suitable for situations where the main pipe is buried in an insulation layer, conventional branch outlets are insufficient in length, external valve connections cannot be made, on-site hot work is restricted, and secondary welding is not allowed. It is compatible with high-temperature, high-pressure, flammable and explosive, and mildly corrosive media, and is used for high-pressure permanent branch systems requiring standardization, welding-free installation, and zero leakage.

Specifications

The applicable standards are MSS SP-97, ASME B16.11, and GB/T19326. Pressure ratings are 3000LB and 6000LB. Main pipe nominal sizes are NPS2-NPS48, and branch nominal sizes are NPS1/8-NPS4. It is compatible with STD, XS, SCH80, SCH160, and XXS thickened high-pressure wall thicknesses. Standard straight pipe section lengths are 89mm, 114mm, and 165mm, and arbitrary non-standard extended customization is supported. Structural types include equal-diameter short-pipe branch outlets, reducing short-pipe branch outlets, insulation-extended type, and ultra-high-pressure thickened type. Connection forms include WN butt-weld type, SN socket-weld type, and TN external thread type (NPT/BSPT). The forming process is integral die forging in one piece. Materials include carbon steel A105, LF2 low-temperature steel, 304/316L stainless steel, F11/F22 chrome-molybdenum alloy steel, 2205 duplex steel, and nickel-based alloys. For other parameters not listed, please contact us for confirmation.

Purchase & Delivery

For conventional carbon steel A105 3000LB/6000LB standard-length butt-weld, socket, and threaded mainstream specifications, MOQ is as low as 1 piece, which can satisfy small-batch procurement for engineering trial samples, insulation pipe network technical upgrades, discharge point upgrades, and similar needs. We maintain stock of national standard and American standard conventional pressure, conventional length, and conventional diameter items; carbon steel and stainless steel butt-weld, socket, and threaded mainstream styles are sufficiently stocked, and in-stock orders ship within 24 hours. Packaging uses foreign-trade heavy-industry-grade refined protection: carbon steel parts are sprayed with long-acting industrial anti-rust oil, and stainless steel parts undergo pickling and passivation treatment; threaded ports are fitted with dedicated plastic thread protector caps, bevels are covered with protective rubber pads, and pipe bodies are wrapped in soft film; each piece is individually wrapped in thickened bubble film and pearl cotton; small and medium sizes are packed in thickened moisture-proof reinforced export cartons, while large-diameter heavy-duty styles are packed on fumigated solid wood pallets, secured overall with steel straps and covered with waterproof film. The outer packaging is marked with length, specification, pressure class, connection method, material, standard, batch, and export shipping mark. Neutral unbranded packaging, LOGO private labeling, and project-exclusive shipping mark customization are supported. For specific delivery times and customization cycles, please contact us for confirmation.

Service & Support

All products undergo fivefold quality inspection before leaving the factory: appearance screening, precise curved-surface accuracy inspection, pipe body straightness calibration, port/thread verification, and non-destructive testing. If, after receiving the goods, customers encounter problems such as original factory quality defects, wrong specifications shipped, length mismatch, port damage, transportation deformation, poor welding fit, or pressure-bearing leakage, we bear full responsibility and support free replacement shipment, returns and exchanges, and re-forging customization, and we bear the round-trip logistics loss costs. We provide free guidance on high-pressure insulation pipe network selection, Nipolet (short-pipe branch outlet) welding and installation processes, insulation layer supporting construction plans, valve manifold point layout optimization, full-process technical Q&A, and complete parameter drawings and process documents. We support long-term customer inventory custodial management, batch shipping, on-demand replenishment, and price-locked stocking services. For non-human-caused damage, lifetime after-sales rights protection is available, with one-on-one dedicated order follow-up service.