Carbon Steel Welded Cap Pipe Fitting
2.Butt weld design for full penetration welding, zero leakage under high pressure. .
3.Uniform sandblasted surface, excellent rust & chemical corrosion resistance. .
4.Compliant with ASME B16.9 standard, stable high pressure bearing capacity. .
5.Complete stock sizes from 1/2" to 3", fast shipment for bulk orders. .
6.Smooth inner wall, no residual burr to block pipeline medium flow. .
7.Wide applicable for petrochemical, power, fire and heating piping systems. .
8.Support OEM wall thickness, laser marking and customized packaging.
Description
Carbon Steel Welded Cap Pipe Fitting
When you need to seal the end of straight pipelines and block medium flow, our Carbon Steel Welded Cap is your ideal industrial piping solution. This standard cap adopts butt weld end design, realizing reliable pipeline end sealing without extra adapters. Made of thickened solid carbon steel, it boasts stable mechanical toughness and excellent high pressure resistance fully compliant with ASME B16.9 standard. Uniform sandblasted surface forms a dense protective layer to isolate moisture & chemical corrosion and extend long service life for indoor and outdoor heavy industrial projects. Smooth inner cavity without burr ensures unobstructed fluid flow for power, petrochemical, fire protection, heating and industrial fluid piping systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Carbon Steel Welded Cap Pipe Fitting |
| Pressure Class | Class 3000 / 6000 High Pressure |
| Raw Material | Thickened Solid Carbon Steel |
| Surface Finish | Uniform Sandblasted Anti-corrosion Surface |
| Connection Type | Butt Weld End for Full Penetration Welding |
| Working Temperature | -29℃ ~ 425℃ |
| Applicable Medium | Steam, Oil, Natural Gas, Water, Corrosive Industrial Fluid |
| Certification | Fully Compliant with ASME B16.9 Standard |
| Application Scenario | Power Plant, Petrochemical, Fire Protection, Heating Heavy Industrial Piping |
Key Features
1.Excellent Anti-corrosion Performance
Uniform sandblasted dense metal surface effectively isolates moisture, salt mist and weak chemical fluid erosion, maintaining stable rust-proof performance for long-term indoor & outdoor industrial piping.
2.Tight Butt Weld Sealing
Standard butt weld end matches carbon steel pipe outer diameter perfectly, full penetration welding achieves zero-leakage pipeline end sealing without extra fittings.
3.Simple & Fast Welding Installation
End cap structure directly blocks pipeline terminal, no transition adapters required; compatible with conventional argon arc welding for efficient on-site fabrication.
4.High Toughness Integrated Structure
Thickened integral carbon steel forming delivers outstanding impact resistance and stable bearing capacity, conforming to ASME B16.9 Class 3000/6000 high pressure standard.
5.Wide Application & Cost Effective
Applicable to power plant, petrochemical, fire protection and heating high-pressure pipeline end sealing; reliable high-pressure performance with favorable cost compared to alloy fittings.
Dimensions and Specifications
Our Carbon Steel Welded Caps support a full range of standard inch sizes, mainstream options include:
- 1/2", 3/4", 1"
- 1-1/4", 1-1/2", 2", 2-1/2", 3"
- Custom size, laser logo and packaging requests are acceptable
Every cap is produced with precise dimensional tolerance. Solid thickened integral welded structure effectively avoids deformation and leakage under Class 3000/6000 high temperature & high pressure working conditions.
Materials and Surface Treatments
1.Main Body Raw Material
Thickened solid carbon steel (compliant with ASME B16.9) features high toughness, strong impact resistance and stable mechanical performance under Class 3000 & 6000 heavy pressure rating.
2.Surface Finish
Uniform sandblasted finish forms dense anti-corrosion metal surface, resisting rust, moisture and various weak chemical media for long-term industrial pipeline service.
3.Welding End Processing
Standard butt weld ends with accurate outer diameter size, achieving perfect matching and zero-leakage welding connection with carbon steel pipes.
Standards and Certifications
Our products comply with rigorous international industry standards:
- Compliant with ASME B16.9 (Carbon Steel Butt Weld Pipe Fittings Class 3000 / 6000)
- ISO9001 quality management system certified
All carbon steel welded caps undergo full testing for pressure resistance, welding dimensional accuracy and sealing performance before packaging.
Applications
1.Power & Petrochemical High-pressure Piping
For end sealing of high-temperature steam, oil and corrosive fluid pipelines in chemical plants and power stations.
2.Fire Protection Pipeline Systems
Ideal for terminal blocking of fire sprinkler high-pressure piping with stable welding sealing performance.
3.Heating Circulation Piping
Suitable for end closure of industrial central heating high-pressure circulation pipelines.
4.Heavy Industrial Fluid Delivery
Used for terminal sealing of compressed air, petroleum and industrial process medium pipelines.
Installation Instructions
- Weld Preparation: Clean pipe outer surface and cap inner socket, remove rust, oil and burrs thoroughly.
- Position Alignment: Insert pipe fully into cap shoulder to ensure stable fit without offset.
- Full Penetration Welding: Use argon arc welding for complete penetration, uniform smooth weld bead.
- Hydrostatic Leak Test: Conduct high-pressure water test after cooling to check zero leakage of welding seam.
- Regular Inspection: Periodically check weld joints for long-term high-pressure pipeline safety.
Follow industrial high-pressure pipeline welding standards during all installation work.
Packaging and Shipping
Each carbon steel welded cap is wrapped with anti-collision protective film to prevent scratches and deformation during transit. Moisture-proof packaging protects sandblasted anti-corrosion surface intact. Bulk orders are loaded on standard pallets for easy handling and container shipment.
Our factory is located in Taigu, Shanxi. We own stable global logistics channels covering major overseas ports, supporting fast and cost-effective bulk delivery.
Quality Control
1.Raw Material Inspection
Every batch of solid thickened A105 carbon steel is tested for chemical composition and mechanical performance to meet Class 3000 / 6000 high pressure standard.
2.Hydrostatic Burst Pressure Test
Random finished welded caps undergo hydraulic burst testing matched with rated working pressure.
3.Butt Weld End Dimension Check
Precision calipers inspect weld end outer diameter and wall thickness to guarantee perfect fit and leak-free welding joints.
4.Surface Anti-corrosion Inspection
Full visual inspection on sandblasted surface to eliminate burrs, rust spots and machining flaws.
OEM and Customization Services
With an annual production capacity of 30,000 tons, we accept large OEM & customized orders. Our technical team supports custom wall thickness, size, laser logo and packaging for special industrial projects. We possess abundant forging & welding molds to realize fast customization and short lead time.
FAQ
Q: Can this carbon steel welded cap be buried underground?
A: Extra external anti-corrosion coating treatment is required for underground laying; direct burial without protective layer will greatly shorten service life.
Q: What is the standard installation method for this Class 3000/6000 welded cap?
A: Insert the carbon steel pipe fully into the cap socket shoulder, adopt full penetration argon arc welding to avoid incomplete weld penetration.
Q: Can it withstand pipeline thermal expansion?
A: It is a rigid welded fitting. Expansion joints are recommended for long pipelines with large temperature fluctuation range.
Q: Is it compatible with different specifications of steel pipes?
A: It matches carbon steel pipes with standard outer diameter for butt welding. Confirm pipe dimension before welding construction.
Q: Why choose carbon steel welded cap instead of stainless steel pipe fittings?
A:Integral A105 steel forging brings high structural toughness and stable Class3000/6000 high pressure resistance, sandblasted anti-corrosion surface, with superior cost performance for heavy industrial high-pressure piping projects.
Contact Us
Looking for suitable carbon steel welded caps for your industrial pipeline project? Our professional technical team provides one-stop product selection support. Email:q1236800000@gmail.com We can supply complete technical datasheets, bulk quotation and accurate delivery schedule. We supply reliable high-pressure carbon steel welded pipe caps for global power, petrochemical and fire-fighting pipeline projects.
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