Non-standard lap joint stub ends do not have fixed standard specifications under national standards, American standards, European standards, or Japanese standards. The pipe body is butt welded, the end is flared outward for sealing, and with a loose flange it can freely rotate and lock. During installation, it can avoid pipeline torsional stress and weld cracking. The product has no fixed restrictions on nominal diameter, wall thickness, length, or pressure rating, and can process non-standard sizes within the range of DN10–DN3000. It supports special-shaped structures such as ultra-short, ultra-long, thickened, thinned, eccentric, reducing, and widened sealing surface. Materials cover carbon steel, the full series of stainless steel, chrome-molybdenum alloy steel, 2205/2507 duplex steel, and special corrosion-resistant alloys. Processes include seamless special-shaped hot pressing, large steel plate rolling, and precision forging machining. We produce according to drawings or measured data, with MOQ as low as 1 piece. Conventional simple non-standard structures are delivered within 3–5 working days after drawing confirmation. For specific dimensions, materials, and working condition adaptation solutions, please contact us for confirmation.
- One-to-one customization according to customer drawings, on-site measured dimensions, or equipment port data, without applying fixed standard specifications
- No fixed restrictions on nominal diameter, wall thickness, length, or pressure rating; can process non-standard sizes within the range of DN10–DN3000
- Supports special-shaped structures such as ultra-short, ultra-long, thickened, thinned, eccentric, reducing, and widened sealing surface
- Loose flange flexible connection; the flange freely rotates for alignment, reducing pipeline torsional stress and butt joint misalignment
- Materials cover carbon steel, the full series of stainless steel, chrome-molybdenum alloy steel, 2205/2507 duplex steel, and special corrosion-resistant alloys
- MOQ as low as 1 piece; a single piece can be mold-opened for customization and production shipment, suitable for engineering rectification and special-shaped replacement parts
- Conventional simple non-standard structures are delivered within 3–5 working days after drawing confirmation, suitable for urgent on-site repairs and expedited replacement parts
- Free provision of drawing deepening, dimension verification, process optimization, and operating condition matching technical services
| Product Name | Custom Stub End |
| Categories | Flanges & Stub Ends |
| Customization | Our factory possesses super-strong customization capability for non-standard lapped flanged short ends covering all dimensions, all structures, and all operating conditions, and can undertake various global customization orders that have no standard, are irregular in shape, have special dimensions, special processes, or special operating conditions, achieving production directly from drawings, implementation directly from actual measurements, and adaptation directly to operating conditions. We support customization of arbitrary non-standard pipe body lengths, non-standard flanging diameters, non-standard sealing thicknesses, non-standard rounded bevels, and eccentric reducing irregular structures, adapting to deviations in old pipe networks, irregular equipment interfaces, and installation in confined spaces with limited access. We can customize special processes as needed, including high-temperature pressure-bearing strengthening, strong-corrosion solution treatment, low-temperature embrittlement resistance, ultra-thick high pressure, and widened sealing, adapting to extreme and special operating conditions. We support ultra-large-diameter irregular rolling, high-precision forged machining, special alloy forming, and multi-standard transitional mixed non-standard structures. |
| MOQ | Non-standard lapped flanged short ends adopt a zero-threshold customized flexible minimum order quantity model, specially adapted to engineering rectification, irregular replacement parts, single-set equipment matching, small-batch technical transformation, and sample actual-measurement needs, with MOQ as low as 1 piece. A single piece can be mold-customized, and a single piece can be produced and shipped, with no minimum order quantity, no specification restrictions, and no material threshold. Regardless of ultra-small irregular diameters, ultra-large non-standard diameters, or special thickened structures |
| Lead Time | Non-standard lapped flanged short ends implement a tiered rapid customization delivery system, flexibly scheduling production according to irregular difficulty, dimensional specifications, material processes, and order volume, efficiently responding to emergency rectification needs in non-standard engineering. For conventional simple non-standard structures, conventional materials, and ordinary dimensional deviation modification products, rapid delivery is made within 3–5 working days after drawing confirmation, adapting to urgent on-site repairs, temporary rectification, and expedited replacement parts |
| Packaging | Non-standard lapped flanged short ends adopt customized tiered export protective packaging, with differentiated protection according to irregular structures, non-standard dimensions, and ultra-large or ultra-small specifications, preventing deformation of irregular pipe fittings during transportation, end-face collisions, sealing surface scratches, and damage to non-standard structures. Small irregular non-standard short ends are individually film-wrapped and fully covered with double-layer bubble wrap, and customized irregular protective caps are added to pipe openings and irregular flanged end faces, providing dedicated protection for irregular sealing surfaces and bevels. Medium-sized non-standard irregular products are individually wrapped in waterproof and rust-proof cloth, with reinforced corner protectors, preventing irregular protrusions, irregular edges from vibration wear, paint loss, and oxidation. Ultra-large-diameter, ultra-long irregular, and eccentric non-standard structures use customized solid wood pallets for fixation, multi-point flexible binding, and double-layer waterproof sealed wrapping, fixing irregular stress points in a targeted manner and preventing deformation during long-distance transportation |
| Reference Price | Inquiry |
| Brand | Guojie |
Applications
- Technical transformation of non-standard pipe networks in old factory areas: connection deviations between new and old pipelines, rectification of irregular dimensions based on on-site actual measurements
- Connection of imported irregular equipment pipelines: non-standard pipe opening matching for pressure vessels, heat exchange equipment, and special-purpose units
- Cross-border multi-standard mixed EPC projects: multi-standard pipeline transitions, non-standard transition sections, and projects with special acceptance requirements
- Installation in dense pipe galleries or narrow well chambers: short-distance docking within equipment gaps, customizable ultra-short pipe bodies and narrow-edge flanging structures
- Special working condition pipeline modification: ultra-high pressure, ultra-low temperature, strong corrosion, high-temperature alternating, seawater salt spray, and special chemical medium pipelines
- Pipeline emergency repair and non-standard rectification acceptance: irregular-shaped replacement parts, single-piece modification, temporary rectification, and expedited replacement parts
Purchasing & Delivery
We adopt a zero-threshold customized flexible minimum order model, with MOQ as low as 1 piece. A single piece can be mold-customized, and a single piece can be produced and shipped. There is no minimum order quantity, no specification limit, and no material threshold. Delivery time is scheduled in tiers according to irregular-shape difficulty, size specifications, material craftsmanship, and order volume. Conventional simple non-standard structures, conventional materials, and ordinary dimensional deviation modified products are delivered within 3–5 working days after drawing confirmation. Packaging adopts customized tiered export protection: small irregular-shaped short sections are film-wrapped plus double-layer bubble wrap, and pipe openings and flanged end faces are equipped with customized protective caps; medium-sized products are wrapped in waterproof and rust-proof cloth with reinforced corner protectors; ultra-large diameter, ultra-long irregular-shaped, and eccentric structures use customized solid wood pallets for fixation, multi-point flexible binding, and double-layer waterproof sealed wrapping. All products are individually labeled with customized labels indicating the customer's drawing number, measured dimensions, working condition material, and batch information. Each batch is accompanied by customized inspection reports, dimensional measurement records, and material certification documents. For specific delivery times and packaging solutions, please contact us to confirm.
Service & Support
Before sales, we provide free drawing review, dimension verification, process optimization, working condition matching, and non-standard feasibility assessment to help avoid customization risks such as dimension mismatch, process incompatibility, and on-site installation failure. Customers without drawings can provide on-site measured dimensions, equipment port data, and installation space constraints. The technical team can provide free drawing and modeling, optimize the structure, and issue production drawings. During sales, we synchronize production progress, measured data, inspection reports, and process details in real time, and provide a full set of acceptance and customs clearance documents free of charge. After sales, we uniformly provide an 18-month warranty. For installation deviations, sealing leakage, structural defects, and performance non-compliance caused by customized processes, production dimensions, or material performance, we will unconditionally remake and reship free of charge and bear all losses. We are equipped with a 24-hour non-standard pipe fitting technical team to provide on-site installation guidance, non-standard docking debugging, working condition optimization, and remote troubleshooting, following up throughout the project acceptance process.
FAQ
What is the biggest difference between non-standard flanged short sections and standard flanged short sections?
Non-standard flanged short sections do not have fixed standards such as national standards, American standards, European standards, or Japanese standards. They are completely customized and produced according to customer drawings, on-site measured dimensions, or equipment port data. They can solve the problems of standard pipe fittings having fixed dimensions, a single structure, and being unable to adapt to irregular-shaped interfaces, old deviations, and narrow spaces.
Can customization be done without drawings?
Yes. If you provide on-site measured dimensions, equipment port data, installation space constraints, and operating condition parameters, our technical team can provide free drawing and modeling, structural optimization, and production drawings, and production can be arranged after confirmation.
Can non-standard flanged stub ends be produced as a single piece?
One-piece minimum order is supported. Single-piece special-shaped parts, single-piece modifications, and single-piece replacement parts can all be produced, with no minimum order quantity, no specification restrictions, and no material threshold.
What is the delivery time for conventional non-standard flanged stub ends?
For conventional simple non-standard structures, conventional materials, and products modified for ordinary dimensional deviations, delivery is 3–5 working days after drawing confirmation. For delivery times of orders with higher special-shaped difficulty, special materials, or large batch orders, please contact us to confirm according to the specific specifications.
What special operating conditions can non-standard flanged stub ends be used for?
Customization can be carried out for operating conditions such as ultra-high pressure, ultra-low temperature, strong corrosion, high-temperature cycling, seawater salt spray, and special chemical media, adapting to specific use conditions through material selection and process adjustment. Please provide parameters such as medium characteristics, temperature, and pressure, and we will assist in confirming the solution.
What after-sales guarantees are provided for non-standard flanged stub ends?
We provide an 18-month warranty. For installation deviations, sealing leaks, structural defects, or performance failures caused by custom craftsmanship, production dimensions, or material performance, we will unconditionally remake and reship for free and bear all losses. At the same time, we are equipped with a 24-hour technical team to provide on-site installation guidance and remote troubleshooting.
