MSS-SP-119 Belled-End Fittings

MSS-SP-119 Belled-End Fittings

MSS-SP-119 Pipe Fittings:

 Belled end pipe fittings are EASIER to install than conventional buttweld pipe fittings. Wrought socket weld bell end pipe fittings are joined with a standard fillet weld. The same weld would typically be used to join cast socket weld, forged socket weld or slip on fittings and flanges.

Bell End Features

1. Bell end pipe fittings can be welded six times faster, on average, than the standard buttweld fitting.
2. In most cases, only one pass is needed to create a good fillet weld. In addition, nearly all the pre-weld end prep and fit up is eliminated with the bell end pipe fittings.
3. The wrought cold-formed bell end pipe fitting eliminates misalignment and wall thickness mismatch problems that are inherent to welded joints (of buttweld fittings).
4. Less experienced welders can easily produce a good fillet weld using bell end pipe fittings from Bestweld.

Bell End Specifications

Today, cold formed socket weld bell-end pipe fittings are manufactured in accordance with Manufacturers Standardization Society – Standard Practice (MSS SP-119). Belled-end pipe fittings IAW MSS SP119 are equal to ANSI B16.9 standard dimension buttweld pipe fittings in Maximum Allowable Design Internal Pressures. Belled-end pipe fittings and B16.9 buttweld pipe fittings are now code recognized as equal in burst allowances. Testing has proven that belled-end pipe fittings are equal in burst pressure (burst test) and superior in fatigue. Belled-end pipe fittings that have a fillet joint installed in applications with pipe flexing and vibrations, a longer life cycle can be expected. Bestweld’s belled-end pipe fittings are manufactured from finished, annealed and pickled minimum wall seamless and welded pipe  depending on the buyers preference and/or requirement). The latest cold forming techniques are used to produce belled end pipe fittings of superior quality and reliability.

Belled End Alloys

Bestweld belled-end pipe fittings are routinely produced and stocked in CRES – stainless steel alloys 304L, 316L, and 321, along with copper nickel alloys (CuNi) 706 (90/10) and 715 (70/30), Titanium Cp Gr. 2, and aluminum (6061,6063). Belled-end pipe fittings in other workable grades of stainless steel and higher nickel alloys are available by special order. Easier to prep, easier to fit and easier to weld, the Bestweld belled-end pipe fitting is the most cost effective pipe fitting in our market place today.


Click the link “MSS-SP-119” to see the Belled-End MSS-SP-119 fittings catalog

  • Specification options: MSS-SP-119-1996, MSS-SP-119-2003, MSS-SP-119-2010  
  • CUSTOM FABRICATION (for example: Heavy Wall fittings (CL700, CL1650, CL3300) and Custom Extra Long Tangent fittings).


1. Specifications

2. Sizes (1/2″-12″)

3. Alloy

Check out Bestweld’s white paper: “BELL END FITTINGS ARE GAINING FAVOR”

Who is Bestweld?

Bestweld is a veteran owned and operated company located in Pottstown, Pennsylvania. Over the years, Bestweld has grown from just two employees when it was incorporated in the 80’s to over 40 employees as of March 2020. Bestweld found success in innovative pipe fitting solutions (like Belled-end fittings) and good old fashioned hard work. A main strength of Bestweld is our employees. We employ intelligent and motivated individuals who are ambitious, conscientious and possess a positive attitude. We are honest, fair, professional, and ambitious in our business dealings.

What does Bestweld do?

We provide cost effective pipe fitting solutions through focusing on safety, quality and performance. The quality and reliability of the products and services offered by Bestweld are maintained at levels consistent with our internal procedures and customer expectations. Our employees dedicate themselves to Bestweld’s quality assurance systems and resultant high level of quality and service. The management of Bestweld coordinates the administrative, marketing, production and quality assurance resources to ensure the attainment of our primary mission.

What can you expect from Bestweld?

Expect excellent quality, great service, and reliability you can depend on. Expect to be treated right, whether you’re a small mom and pop shop or a big corporation. Bestweld works with our suppliers and customers, as partners, and is continuously improving our products and services. We believe the delivery of high quality, superior products leads not only to the success of Bestweld but also to its business partners.

Where Quality is Tradition Since 1981 Contact Bestweld