Heavy-duty Welded Pipe Caps For Large-diameter Boilers, Petrochemical, And Industrial Piping
Large size caps are used for connecting pipes of different diameters and find wide applications in various chemicals, construction industries, paper, cement & ship builders.
Heavy-duty Welded Pipe Caps For Large-diameter Boilers, Petrochemical, And Industrial Piping
Large size caps are used for connecting pipes of different diameters and find wide applications in various chemicals, construction industries, paper, cement & ship builders.
Large-size pipe caps are heavy-duty welded fittings designed to seal the ends of large-diameter pipes, providing exceptional corrosion resistance and protection against environmental exposure, debris, and pressure loss. These caps are critical for boiler pipeline protection and erosion/corrosion resistance in industries such as petrochemical, power generation, chemical processing, and water treatment.
Compliant with standards like DIN 2617, ASTM A403, ASME B16.9, and EN 10253, large-size pipe caps are typically available in sizes from 24″ to 72″ (DN600-DN1800), with wall thicknesses up to 200 mm (Schedule 40 to SCH 160). They are manufactured from materials such as carbon steel (HII, P235GH), stainless steel (304, 316L, 1.4541, 1.4571), or alloy steel (15Mo3, 13CrMo44, 10CrMo910). Surface treatments like galvanization, Fusion Bonded Epoxy (FBE), or 3LPE coatings enhance durability in harsh environments.
These caps undergo stringent testing, including chemical analysis (e.g., HII: C ≤0.16%; 316L: C ≤0.03%), tensile testing (HII: YS ≥235 MPa, TS ≥360-510 MPa; 316L: YS ≥205 MPa, TS ≥515 MPa), hydrostatic testing (up to 9.8 MPa), and nondestructive methods (radiographic, ultrasonic, PMI). With densities of ~7.85 g/cm³ for carbon steel or ~8.0 g/cm³ for stainless steel, and suitability for temperatures up to 450°C (carbon steel) or 870°C (stainless steel), these caps excel in high-pressure piping systems like large-scale boilers, refinery pipelines, and offshore platforms.
The welded design ensures a secure, leak-free seal, making large-size pipe caps ideal for terminating large-diameter pipelines in corrosive and high-pressure environments, such as chemical plants and power generation facilities.
| Specification | Details |
|---|---|
| Standards | DIN 2617, ASTM A403, ASME B16.9, EN 10253 |
| Type | Welded Pipe Cap |
| Material | Carbon Steel (HII, P235GH), Stainless Steel (304, 316L, 1.4541, 1.4571), Alloy Steel (15Mo3, 13CrMo44, 10CrMo910) |
| Size Range | 24″ to 72″ (DN600-DN1800) |
| Wall Thickness | Up to 200 mm (Schedule 40 to SCH 160) |
| Manufacturing | Welded Fabrication, Hot Forming |
| Coatings | Galvanization, FBE, 3LPE, Pickling, Passivation |
| Testing | Chemical Analysis (HII: C ≤0.16%; 316L: C ≤0.03%), Tensile (HII: YS ≥235 MPa, TS ≥360-510 MPa; 316L: YS ≥205 MPa, TS ≥515 MPa), Hydrostatic (≥9.8 MPa), Radiographic, Ultrasonic, PMI |
| Operating Conditions | Pressure: ≥9.8 MPa, Temperature: Up to 450°C (carbon steel), 870°C (stainless steel) |
| Certifications | EN 10204/3.1, ISO 9001, Third-Party Inspection |
| Feature | Large-Size Pipe Cap | DIN 2617 Seamless Pipe Cap | ASME SA-234 WPB End Cap |
|---|---|---|---|
| Material | Carbon Steel (HII, P235GH), Stainless Steel (304, 316L), Alloy Steel (15Mo3, 13CrMo44) | Carbon Steel (HII, P235GH), Stainless Steel (1.4541, 1.4571) | Carbon Steel (ASME SA-234 WPB) |
| Standard | DIN 2617, ASTM A403, ASME B16.9, EN 10253 | DIN 2617, EN 10253 | ASME SA-234, ASME B16.9 |
| Size Range | 24″ to 72″ (DN600-DN1800) | 1/2″ to 48″ (DN15-DN1200) | 1/2″ to 48″ |
| Corrosion Resistance | Excellent (stainless steel), Good (carbon steel with coatings) | Good (with coatings) | Good (with coatings) |
| Erosion Resistance | Good (static application) | Good (static application) | Good (static application) |
| Applications | Petrochemical, power generation, chemical processing | Boilers, petrochemical, chemical processing | Boilers, petrochemical, chemical processing |
| Temperature Range | Up to 450°C (carbon steel), 870°C (stainless steel) | Up to 450°C (carbon steel) | Up to 425°C |
| Cost | Higher (due to size) | Moderate | Moderate |
| Key Advantage | Seals large-diameter pipelines | Butt-welded for secure sealing | Cost-effective pipeline sealing |
Coatings (FBE, 3LPE) or stainless steel for harsh environments.
Welded design for reliable large-diameter pipeline termination.
Withstands pressures ≥9.8 MPa in large-scale systems.
Up to 450°C (carbon steel) or 870°C (stainless steel).
Integrates with large-diameter piping systems.
Available up to 72″ for large-scale applications.
A curated list of long-tail keywords for large-size pipe caps, covering standards, materials, and industrial applications.
Note: Large-size pipe caps are engineered for corrosion-resistant, high-pressure sealing in large-diameter industrial pipelines. Contact a certified supplier for detailed specifications.
Standards: ASME B16.9 and ASME B16.25
Description: Designed for butt welding to pipe end, providing permanent and strong connection.
Standards: ASME B16.11
Description: Fit into socket of pipe fitting and welded in place.
Thread Types: NPT and BSP configurations
Description: Feature internal or external threads for screwing onto threaded pipe ends.
Features: Flange, slotted head, knurled or faceted head options
Considerations: Length and width dimensions are critical
Design: Dome-shaped for optimal pressure distribution
Pipeline terminations, wellhead applications, refinery piping
Process piping systems, chemical storage and handling
Steam and water systems, cooling circuits, fuel handling
Building services piping, HVAC systems, fire protection
Ship piping systems, offshore installations, marine equipment
Hygienic piping systems, processing equipment, sterile systems
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