Oval Tube Cap
The elliptical pipe cap is the most versatile and optimally stress-bearing permanent end-closure pipe fitting for industrial piping systems, mainly used for closing the ports of various fluid transport pipelines, pressure sealing, and pipel
Inquiry
- The biggest advantages of this 2:1 standard elliptical pipe cap are its scientific structure, optimal force distribution, and the strongest universal compatibility across the entire network
- It is recognized by the industry as the preferred structure for pipeline plugging. It adopts an integrated hot stamping seamless forming process
- no welds, no sand holes, no cracks
- uniform wall thickness, precise curvature, and neat straight edges
- Zero-error pipe alignment for welding
Detailed Introduction
Elliptical pipe caps adopt the industry-standard 2:1 major-to-minor axis standard elliptical ratio, are composed of a curved surface and regular straight edge sections, and are integrally stamped and formed as a whole, with no spliced welds. Compared with dished, flat-bottomed, or spherical crown pipe caps, the elliptical curved surface can more evenly disperse the internal fluid pressure, steam pressure, and medium impact force of the pipeline, reducing the risk of deformation and leakage caused by stress concentration at the port. The elliptical pipe caps we produce comply with GB/T12459, GB/T25198, and ASME B16.9 standards, with nominal diameters covering DN15 to DN4000, wall thicknesses from 2mm to 100mm, and pressure ratings from PN10 to PN100. Material, surface treatment, and packaging methods can be confirmed according to project requirements. You are welcome to contact us with dimensions, quantity, and standard requirements so that we can assist with a quotation.
- 2:1 standard elliptical ratio, uniform force on the curved surface, reducing stress concentration at the port
- Integrally stamped and formed, no spliced welds, uniform wall thickness, precise curvature
- Complies with GB/T12459, GB/T25198, and ASME B16.9 standards, with strong dimensional interchangeability
- Nominal diameter DN15-DN4000, wall thickness 2mm-100mm, pressure rating PN10-PN100
- Supports customization in materials such as carbon steel, stainless steel, duplex steel, and heat-resistant alloy steel
- Supports neutral packaging, private-label packaging, and customized shipping marks, suitable for export and distribution
| Product Name | Oval Tube Cap |
| Category | Contact us to confirm |
| Oval tube caps are uniformly sized at 2 | 1 standard elliptical ratio, strictly implementing GB/T12459 and ASME B16.9 international standards. Nominal diameter DN15-DN4000, imperial 1/2″-160″, wall thickness 2mm-100mm full coverage. Pressure rating PN10-PN100, American standard SCH10/SCH40/SCH80/SCH160/XXS. The forming process is integral hot stamping and cold stamping integrated seamless forming, with no spliced welds. The working temperature range is -20℃ to 650℃, suitable for multiple media such as water, gas, oil and gas, steam, and weak acids and weak bases. The port is straight, the groove is standard, and the elliptical curvature error is controlled within ±0.5mm, with strong dimensional interchangeability and high installation adaptability. Surface treatment options include black |
| Customization | Our factory has full-dimensional customization capabilities for 2:1 standard elliptical pipe caps, and can meet the needs of all conventional + non-standard working conditions. We support customization of non-standard diameters, extra-large diameters, extra-small diameters, and extra-thick-wall high-pressure elliptical pipe caps; we can customize special tolerances, precision bevels, special straight edge lengths, and high-precision curved surface products. We can customize carbon steel, stainless steel, duplex steel, heat-resistant alloy steel, and special corrosion-resistant material formulas as needed. We support surface process customization: sandblasting, pickling and passivation, mirror polishing, wire drawing, hot-dip galvanizing, and heavy-duty anti-corrosion and anti-rust treatment. According to customer drawings, pressure parameters, equipment working conditions, and overseas standards, we provide one-to-one tailored mold opening and independent production. We support customer LOGO silk-screen printing, OEM branding, neutral unbranded packaging, and customized outer box shipping marks. We can comply with American standards, German standards, Japanese standards |
| MOQ | Our factory's elliptical pipe caps support flexible and loose minimum order rules, adapting to various needs such as foreign trade sample orders, small trial orders, bulk full-container orders, and large engineering orders. Conventional standard in-stock specifications have a minimum order quantity of 1 piece, which can meet customers' needs for sample submission for inspection, engineering replacement parts, equipment maintenance, and sample testing. The MOQ for conventional carbon steel and stainless steel general specifications is 10 pieces, suitable for cross-border small and medium sellers, trade |
| Lead Time | Conventional in-stock standard elliptical pipe caps can be shipped on the same day as payment, with sufficient inventory specifications and ready for outbound delivery at any time. DN15-DN600 conventional diameters, SCH40 ordinary wall thickness carbon steel, and stainless steel standard products, with batches within 500 pieces, can be quickly completed and shipped within 1-3 working days. Orders for medium and large diameters, thick-wall high-pressure, and commonly used alloy steel specifications are delivered within 3-5 working days. Non |
| Packaging | Elliptical pipe caps use special multi-layer protective packaging for foreign trade export, specifically protecting the elliptical curved surface, port bevel, and welding positions, and preventing transportation collisions, scratches, deformation, and rust. Small-diameter products are individually wrapped in bubble film, with port protective rings for protection, and precision specifications are individually isolated and packaged to prevent friction paint loss and damage to the curvature. Medium-diameter products are wrapped in two layers of waterproof plastic film + woven bags, neatly stacked and fixed, dustproof, moisture-proof, and wear-resistant. Large-diameter, thick-wall, and high-pressure elliptical pipe caps are fixed with solid wood pallets and fumigated wooden pallets, reinforced with steel straps for shock resistance, avoiding deformation from long-distance sea freight bumps. All products are sprayed on the outside with specifications, material, standards, and heat numbers, with clear markings and clear classification, convenient for customers to store, count, inspect, and archive. We support neutral unbranded packaging and customer LOGO |
| Reference Price | Inquiry |
Applications
- Permanent port sealing for petroleum refining, natural gas transportation, and urban gas pipelines
- Final closure of pipelines for thermal power generation, cogeneration, nuclear power supporting facilities, and energy storage new energy
- Terminal sealing for fine chemicals, pharmaceuticals, and acid-base corrosive media transportation pipelines
- Pipeline closure in tap water engineering, sewage treatment, and heating network renovation
- Pipe opening plugging for shipbuilding, offshore platforms, pressure vessels, and boiler equipment
Overview
Oval pipe caps, also known as 2:1 standard elliptical heads, oval plugs, oval blind caps, or oval end caps, are permanent plugging pipe fittings commonly used in industrial piping systems. They adopt the industry-standard 2:1 major-to-minor axis standard elliptical ratio design, are composed of a curved surface and a regular straight edge section, and are integrally stamped and formed as one piece with no spliced welds. The elliptical curved surface can evenly disperse the internal fluid pressure, steam pressure, and medium impact force of the pipeline, reducing the risk of port bursting, leakage, and deformation. The oval pipe caps we produce comply with GB/T12459, GB/T25198, and ASME B16.9 standards, and are suitable for fluid piping systems in industries such as petrochemicals, natural gas, electric power and heating, municipal gas, sewage treatment, shipbuilding and heavy industry, new energy, and pharmaceutical and food.
Key Features
The core advantage of oval pipe caps lies in their reasonable structural stress distribution. The 2:1 standard elliptical curved surface can disperse the internal pressure of the pipeline over a larger area, reducing stress concentration, and is suitable for medium- and high-pressure pipelines and continuously operating pipelines. The products are formed by integral hot stamping or cold stamping, with no welds, no sand holes, and no cracks, uniform wall thickness, precise curvature, and regular straight edges, small welding alignment errors, and tight sealing after installation. Compared with dished, flat-bottomed, or spherical crown-shaped pipe caps, oval pipe caps are more balanced in structural stability, pressure resistance, and adaptability, and have greater versatility. We can customize according to customer drawings, pressure parameters, and overseas standards, and support a variety of materials and surface treatments.
Applications
Oval pipe caps can be used for final plugging of newly built engineering pipelines, closure of old pipe network renovations, permanent plugging of equipment spare ports, pipe pressure test sealing, as well as overhead pipelines, buried pipelines, indoor and outdoor pipe networks, and working conditions with alternating high and low temperatures. In the energy industry, they are suitable for petroleum refining, natural gas transmission, urban gas, thermal power generation, combined heat and power, nuclear power supporting facilities, and energy storage new energy pipelines; in the chemical industry, they are suitable for fine chemicals, pharmaceutical chemicals, acid-base corrosive medium transmission, and high-temperature process pipelines; in the municipal field, they are suitable for tap water projects, sewage treatment, heating pipe networks, and urban pipe network renovations; in the heavy industry field, they are suitable for shipbuilding, offshore platforms, pressure vessels, boiler equipment, and mining transmission pipelines. Whether a specific working condition is suitable, welcome to contact us to confirm.
Specifications
Oval pipe caps comply with GB/T12459, GB/T25198, and ASME B16.9 standards, with nominal diameters covering DN15 to DN4000, imperial 1/2″ to 160″, wall thickness 2mm to 100mm, pressure rating PN10 to PN100, and U.S. standard wall thickness grades including SCH10, SCH40, SCH80, SCH160, and XXS. The operating temperature range is -20℃ to 650℃. Materials can be selected from carbon steel, stainless steel, duplex steel, heat-resistant alloy steel, etc., and surface treatments can be selected from sandblasting, pickling and passivation, mirror polishing, brushing, hot-dip galvanizing, and heavy-duty anti-corrosion and anti-rust treatment. Non-standard diameters, ultra-thick walls, special bevels, and special straight edge lengths can be customized according to project requirements. If you need to confirm specific specifications, please contact us and provide dimensions, quantity, and standard requirements.
Purchasing & Delivery
We support flexible minimum order quantities. For regular standard in-stock specifications, the minimum order is 1 piece, suitable for sample inspection, engineering replacement parts, and equipment repair; for regular carbon steel and stainless steel general specifications, the MOQ is 10 pieces. Regular in-stock standard oval pipe caps can be shipped on the same day payment is made; for DN15-DN600 regular diameters and SCH40 ordinary wall thickness carbon steel and stainless steel standard products, orders within 500 pieces can be completed and shipped in 1-3 working days; orders for medium and large diameters, thick-walled high-pressure, and commonly used alloy steel specifications are delivered in 3-5 working days. Packaging uses special multi-layer protection for foreign trade export: small diameters use bubble wrap plus port protection rings, medium diameters use waterproof plastic film plus woven bags, and large-diameter thick-walled products use solid wood pallets and steel strip reinforcement. Neutral unmarked packaging, customer LOGO private-label packaging, and customized shipping mark packaging are supported. For specific delivery times and packaging requirements, please contact us to confirm.
Service & Support
We provide full support from selection to delivery. Before sales, we can assist in confirming material, diameter, and wall thickness according to working conditions, pipeline standards, and pressure parameters; during sales, a dedicated customer manager provides one-on-one order tracking and quickly responds to quotation, production scheduling, and shipping issues; after sales, we provide installation precautions and high-pressure working condition adaptation suggestions. All products undergo 100% flaw detection inspection before leaving the factory. If after receiving the goods the customer encounters issues for which we are responsible, such as material mismatch, dimensional deviation, process defects, or quality defects, we support free returns and exchanges, free replacement shipments, and full compensation. For foreign trade orders, we can assist in tracking logistics, checking shipping schedules, and coordinating customs clearance documents. Long-term supply customers enjoy priority production scheduling and emergency replenishment support.
FAQ
What is the difference between oval pipe caps and ordinary pipe caps?
Elliptical pipe caps adopt a 2:1 standard elliptical structure, with uniform force on the curved surface, which can disperse the internal pressure of the pipeline and reduce stress concentration. Compared with dished, flat-bottomed, or spherical-crown pipe caps, it is more balanced in structural stability, pressure resistance, and versatility, making it suitable for medium- and high-pressure industrial pipelines in continuous operation.
What standards and materials are supported for elliptical pipe caps?
We implement GB/T12459, GB/T25198, and ASME B16.9 standards. Materials can be selected from carbon steel, stainless steel, duplex steel, heat-resistant alloy steel, etc. We can also produce according to American standards, German standards, Japanese standards, European standards, or enterprise standards and non-standard requirements. For specific material and standard requirements, please contact us for confirmation.
Do you support export customization and OEM packaging?
Yes. We can customize diameter, wall thickness, bevel, and straight edge length according to customer drawings, pressure parameters, and overseas standards, and support customer LOGO silk-screen printing, OEM branding, neutral unbranded packaging, and custom outer carton shipping marks. We can assist with export customs clearance documents and inspection reports. For specific requirements, please contact us for confirmation.
Are the products subjected to flaw detection testing?
All elliptical pipe caps undergo 100% non-destructive flaw detection testing before leaving the factory to prevent defective products from entering the market. If you need specific inspection reports or third-party inspection, please contact us to confirm the specific arrangements.
What are the delivery time and minimum order quantity for elliptical pipe caps?
Regular standard in-stock specifications have a minimum order quantity of 1 piece, and the MOQ for regular carbon steel and stainless steel general-purpose specifications is 10 pieces. Regular in-stock items ship on the same day as payment, orders of 500 pieces or fewer within 1-3 business days, and medium-to-large diameter and thick-walled high-pressure orders within 3-5 business days. Please contact us to confirm the specific delivery time and minimum order quantity.
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