Harry Fittings stands out as a top-notch manufacturer and supplier of high-quality collars, proudly based in Houston, USA. With a wealth of experience and a strong dedication to excellence, this company focuses on crafting durable and precisely engineered collars that are essential for a variety of piping and industrial applications. Renowned for their exceptional craftsmanship, commitment to international standards, and speedy delivery, Harry Fittings caters to a wide array of industries, including oil & gas, petrochemical, construction, and manufacturing. Their collars are expertly designed to create robust pipe connections, making them a go-to choice for customers looking for reliable and high-performance pipe fitting solutions throughout the United States and beyond.
Standard – ANSI/ASME :ASTM A403 / ASME SA403, ANSI B16.9, ASME B16.25, ASME B16.28, MSS SP-43.
DIN : DIN2605, DIN2615, DIN2616, DIN2617, DIN28011
EN : EN10253-1, EN10253-2
Schedule : SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type : Seamless / ERW / Welded / Fabricated
Size: 1/2″ (15 NB) to 48″ (1200NB)
Form: Pipe Collar, Butt weld Collar, Fitting Collar
The collars produced by Harry Fittings are typically made from high-grade carbon steel, stainless steel, or alloy steel, tailored to meet specific application needs. The materials adhere to ASTM and ASME standards, ensuring they are resistant to corrosion, possess high tensile strength, and boast impressive durability. These collars showcase excellent mechanical properties, with a tensile strength range of 485–620 MPa, yield strength exceeding 250 MPa, and commendable elongation and impact resistance. The meticulous attention to chemical composition and heat treatment processes guarantees they perform well under high pressure and temperature conditions, making them perfect for critical industrial applications.
Harry Fittings is a leading supplier of Collar in Houston, USA. We offer an extensive range of Collar, renowned for their excellent corrosion resistance and high strength, which makes them perfect for demanding industrial applications like chemical processing, marine environments, and high-temperature systems. With a commitment to quality and reliable delivery, we ensure our clients receive top-tier products tailored to meet the specific needs of various industries.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choose Collar from Harry Fittings for superior quality, exceptional corrosion resistance, and reliable performance in extreme conditions. We offer customized solutions backed by expert support and industry experience.
Collars offer several advantages, including providing strong and secure connections for pipes and fittings, ensuring leak-proof joints in critical systems. They are highly durable, with resistance to corrosion, wear, and high temperatures, making them ideal for demanding industrial environments. Collars are easy to install and offer precise alignment, reducing the need for complex assembly. Their load-bearing capacity enhances the overall strength of the system, ensuring long-term performance. Additionally, collars are versatile and can be used across various sectors, including petrochemical, construction, and manufacturing, ensuring reliable and efficient operation.
Yes, custom sizes for Collar are available at Harry Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@harryfittings.us.
Stainless Steel Pipe Collar : ASTM A403 WP316/316L, ASTM A403 WP304/304L, ASTM A182 F316L, 304L, DIN 1.4301, DIN1.4306, DIN 1.4401, DIN 1.4404, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L
Carbon Steel Pipe Collar : ASTM A234, ASME SA234 WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70.
Alloy Steel Pipe Collar : ASTM A234, ASME SA234 WP1 / WP5 / WP9 / WP11 / WP22 / WP91
Duplex Steel Pipe Collar : ASTM A815, ASME SA815 UNS No S31803, S32205
Super Duplex Pipe Collar : ASTM A815, ASME SA815 UNS No S32750, S32950
Nickel Alloy Pipe Collar : ASTM B336, ASME SB336, Nickel 200 (UNS No. No2200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), Titanium (Grade I & II), Cupro-Nickel 70/30, CuNi10Fe1Mn, CuNi30Mn1Fe.
Low Temperature Carbon Steel Pipe Collar : ASTM A420 WPL3, A420 WPL6
| Nominal Pipe Size | Outside diameter at bevel | Length(E) | Limitwall thickness |
| 1/2″ | 21.3 | 25 | 4.57 |
| 3/4″ | 26.7 | 25 | 3.81 |
| 1″ | 33.4 | 38 | 4.57 |
| 1 1/4″ | 42.2 | 38 | 4.83 |
| 1 1/2″ | 48.3 | 38 | 5.08 |
| 2″ | 60.3 | 38 | 5.59 |
| 2 1/2″ | 73.0 | 38 | 7.11 |
| 3″ | 88.9 | 51 | 7.62 |
| 3 1/2″ | 101.6 | 64 | 8.13 |
| 4″ | 114.3 | 64 | 8.64 |
| 5″ | 141.3 | 76 | 9.65 |
| 6″ | 168.3 | 89 | 10.92 |
| 8″ | 219.1 | 102 | 12.70 |
| 10″ | 273.0 | 127 | 12.70 |
| 12″ | 323.8 | 152 | 12.70 |
| 14″ | 355.6 | 165 | 12.70 |
| 16″ | 406.4 | 178 | 12.70 |
| 18″ | 457.0 | 203 | 12.70 |
| 20″ | 508.0 | 229 | 12.70 |
| 22″ | 559.0 | 254 | 12.70 |
| 24″ | 610.0 | 267 | 12.70 |
Harry Fittings’ collars are widely utilized for connecting flanges to pipes and securing piping systems across various industrial environments. Their main role is to ensure tight, leak-proof joints in pipelines, particularly in high-pressure settings. Common uses include oil and gas pipelines, chemical processing plants, water treatment facilities, and power generation units. These collars provide a solid foundation for welding or bolting, making them suitable for both permanent and removable connections. Thanks to their versatility and strength, they are indispensable in structural piping, marine, offshore, and heavy machinery applications, ensuring reliability and long-lasting performance.
Get in touch with one of our Technical Sales Representatives to request a quote or get answers to any questions you may have.








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