Weld bosses and weldolets

Order bosses and weldolets of various sizes at competitive prices. Welded and threaded types made from carbon, alloy, corrosion-resistant, duplex, and super duplex steels — with delivery to the destination point. An ASME boss (weldolet) is a cylindrical fitting used to connect and reinforce a branch line to a main pipe or vessel. The catalog includes models in various sizes, differing in connection method, diameter, thread type, and material of manufacture. All products are manufactured in strict accordance with ASME B16.9 and MSS SP-97 standards, ensuring reliability, durability, and suitability for complex technological systems in the oil and gas, chemical, and power generation industries. Delivery is carried out in compliance with transportation and packaging requirements to ensure complete product safety.

Welded bosses and weldolets ASME from the manufacturer

ASME welded bosses and weldolets are short pipe sections with a branch outlet designed for installation into a main pipeline. Their design ensures minimal pressure loss and a leak-tight connection, allowing installation without shutting down the system and enabling integration of additional equipment.

Materials used in manufacturing include:

- carbon and low-alloy steels (ASTM A234 WPB);

- stainless austenitic alloys (ASTM A403 WP304/316);

- duplex and super duplex steels;

- heat-resistant and high-temperature alloys.

Such materials ensure durability, corrosion resistance, and reliable connections under pressure, temperature fluctuations, and exposure to aggressive chemical environments.

How to choose and purchase an ASME boss

When selecting an ASME boss, the following factors should be considered:

- diameter and material of the main pipe or vessel;

- connection type (welded boss or weldolet according to MSS SP-97);

- operating conditions — working pressure, temperature, and aggressiveness of the medium;

- thread type and wall thickness of the fitting.

Compliance with ASME and ASTM standards ensures connection strength, compatibility with pipeline systems, and minimization of leakage risks. Proper selection simplifies installation, reduces equipment downtime, and ensures stable pipeline operation even under intensive service conditions.

FAQ

1. What advantages do bosses have compared to other connection types?

Bosses provide reliable and leak-tight pipe connections, are easy to install and dismantle, and allow branch connections to be created in pipelines without complex welding operations.

2. Can a boss be dismantled and reused?

Yes, provided the thread integrity is preserved. However, after each removal it is recommended to inspect the threaded section and replace the sealing element if necessary.

3. Can a boss be used for temporary connections?

Yes, bosses are well suited for temporary connections because they allow quick installation and removal. After removal, the opening can easily be sealed with a threaded plug.

Comments

Comment 1: Is it possible to install a boss in the upper section of a vessel?

Yes, bosses can be installed in any section of a vessel body. It is important to consider possible gravitational or thermal deformations during installation.

Comment 2: Can a boss be installed in a horizontal position?

Yes, orientation does not affect functionality. However, when installing measuring instruments, the direction of flow and gravitational effects should be taken into account.

Comment 3: Can a boss be used as a mounting base for a nozzle?

Yes, bosses are often used as a base for installing nozzles, especially in vessels and pipelines where an additional branch is required for monitoring or sampling of the medium.