Butt weld fitting is to connect pipes and fittings ends by butt welding process. Also known by welded pipe fittings. It has ends in beveled or plain, dimensions normally from 3/4” to 24”. Manufactured according to ASME B16.9. Material in carbon, alloy and stainless steel.

Carbon steel butt weld fittings are made up of carbon steel which has a limited range of ingredients in its composition. Carbon steels have high hardness and wear and tear properties. The fittings made up of carbon steel are applied through various industrial, commercial and domestic applications.

Carbon Steel Butt Weld Fittings Specification

There are different grades, classes, schedules and pressure ratings of these pipe fittings. The schedules correlate to the wall thickness, outer diameter and the pressure containment capacity of a particular pipe fitting.

ASTM A234 – Wrought Carbon and Alloy Steel Butt Weld Fittings : This specification covers wrought carbon steel and alloy steel butt weld fittings of seamless and welded construction. This is the most common material for carbon steel butt weld fittingsn and size for seamless is up to 24”, where diameters of 24” or larger may come seamless or welded. These butt weld fittings are for use in pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures.
ASTM A860: This specification covers wrought high-strength carbon steel butt weld fittings of seamless and electric fusion-welded construction covered by the latest revisions of ASME B16.9 and MSS-SP-75. These butt weld fittings are for use in high-pressure gas and oil transmission and distribution systems.

Types of CS Pipe Fittings

Butt weld fittings are pipe fittings used to change of direction of flow, to branch off, reduce pipe size or attach auxiliary equipment. Butt weld pipe fittings in carbon steel and stainless steel are the joining components that make possible the assembly of valves, pipes and equipment onto the piping system. Carbon steel butt weld fittings use seamless or welded pipe as starting material and process to the shape of elbows, tees & reducers by hot and cold forming.

Carbon Steel Butt Weld Elbow

90 Degree Elbow

90 degree elbow change the oil and gas flow direction by 90 angle. And have long radius (LR) and short radius ( SR) types. LR means 1.5D and SR means 1D.

45 Degree Elbow

Almost same as above, just the angle is 45 degree. By the way, the weight is half of 90 degree elbow.

180 Degree Elbow

180 degree elbow is a pipe fitting that bends the pipeline by 180 degrees. It is used when a large directional change is needed or when a pipeline needs to be reversed without creating back flow.

Size & Schedule

1/2″ ~ 60″ & DN15 ~ 1500

SCH 20, STD, 40, XS, 80, 100, 120, 140, 160, XXS

Butt Weld Tee

Carbon Steel Equal Tee

The run pipe diameter is same to branch diameter, so we call it straight tee sometimes. It is used to connect pipelines with a pipe at a right angle with the line.

Carbon Steel Reducing Tee

From the name, we can know the three sizes are different, strictly speaking, the branch diameter is smaller than run pipe.

Size and Thickness

1/2″ ~ 60″ & DN15 ~ 1500

SCH 10S, 20, STD, 40, XS, 80, 100, 120, 140, 160, XXS

CS Butt Weld Reducer Fittings

Concentric Reducer

Carbon steel concentric reducer is often used inline on a vertical flow application, or if laid horizontally, as an increaser.

Carbon Steel Eccentric Reducer

An eccentric reducer is also called welded eccentric coupling. It allows for welding a large pipe to a smaller pipe with an offset center line.

Size and Thickness

1/2″ ~ 48″ & DN15 ~ 1200

SCH 10S, 20, STD, 40, XS, 80, 100, 120, 140, 160, XXS

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Stainless steel butt weld fittings are connected by welding, which has the advantages of compact structure and good sealing. Compared with other connection methods, butt welding connection has higher reliability and durability.

Classification of Stainless Steel Butt Weld Fittings

There are various types of stainless steel butt weld fittings that can meet the design requirements of various pipeline systems. The common types of butt weld fittings include stainless steel butt weld elbow, tee, concentric reducer, eccentric reducer, cross, cap, stub end, etc. These fittings play important roles in different pipeline systems.

Stainless Steel Butt Weld Elbow

Stainless steel butt weld elbow is the most common type of pipe fittings in stainless steel butt weld fittings. Butt weld elbow can be divided into long radius elbow and short radius elbows according to different bending radius. According to the angle, it can be divided into 45 degree elbow, 90 degree elbow, and 180 degree elbows.

Specification of ASME B16.9 Elbow

Stainless steel butt weld elbow produced according to the ASME B16.9 standard. This standard have a wide range of sizes, from 1/2 “to 48”. The common wall thickness pressure levels include Sch 5s, Sch 10s, Sch 10, Sch 20, Sch 30, Sch 40s, STD, Sch 40, Sch 60, Sch 80s, XS, etc. Among them, the most commonly used are STD and XS. It depends on the design requirements and working pressure of the pipeline.

Dimension of 90 Degree Elbow

Stainless Steel Butt Weld Tee

Stainless steel butt weld tee is a common type of pipeline connection accessory, consisting of three ends. The horizontal two ends are the main pipe ends, and the vertical one is the branch pipe end. It is mainly used to connect pipelines, control fluid flow, and achieve operations such as opening, closing, splitting, and mixing of fluids. According to the diameter between the ends, butt weld tee can be divided into equal tee and reducing tee.

Specification of Butt Weld Tee

Dimension

Stainless Steel Butt Weld Reducer

Stainless steel butt weld reducers are a special type of stainless steel butt weld fittings mainly used to connect two pipes of different diameters. According to different structures, it can be divided into stainless steel concentric reducers and eccentric reducers.

Specification

Stainless steel reducer belong to stainless steel butt weld fittings, produced in accordance with the American standard ASME B16.9. Their size characteristics are reflected in their wide range of specifications, diverse wall thickness sizes, wide application areas, and high degree of customization. These characteristics make it an indispensable and important component in pipeline systems.

Dimension of ASME B16.9 Reducer

Stainless Steel Butt Weld Cap

Stainless steel butt weld cap is made of stainless steel material and fixed at the end of the pipeline by welding, used to seal the pipeline. It’s function is the same as a pipe plug, also known as stainless steel plug or stainless steel head. As an important pipeline connection accessory, it plays a crucial role in multiple fields.

Specification of Stainless Steel Butt Weld Cap

Dimension of ASME B16.9 Stainless Steel Butt Weld Cap

Material Features of Stainless Steel Butt Weld Fittings

The main material of stainless steel butt weld fittings is stainless steel, which is a metal material with excellent corrosion resistance, high strength, and high temperature performance. There are various types of stainless steel, such as ASTM A403 WP 304/L, 316/L, etc. The selection of these materials depends on the specific application environment and requirements.
ASTM A403 specification is a standard for austenitic stainless steel materials, which includes various grades such as 304, 316, 316L, etc. The ASTM A403 specification specifies the manufacturing, inspection, and testing requirements for stainless steel butt welded pipe fittings. Classify and name fittings based on their material type, size, and pressure rating to indicate their applicable range. In addition, the specifications also specify requirements for the chemical composition, mechanical properties, heat treatment, surface treatment, and other aspects of different grades of stainless steel.

Chemical Composition

Mechanical Properties

Process of Stainless Steel Butt Weld Fittings

In ASTM A403 specification, the manufacturing process of welded pipe fittings includes steps such as raw material preparation, cutting and processing, forging, welding, heat treatment, surface treatment, etc. During the manufacturing process, attention should be paid to preventing material damage, oxidation, and decarburization to ensure the surface quality and performance of the product.
The heat treatment of stainless steel pipe fittings mainly includes three processes: heating, insulation, and cooling. These processes are interconnected and uninterrupted. The ASTM A403 standard specifies the time, temperature, and cooling method for solution annealing corresponding to different grades of stainless steel materials.

Advantage

Reliable Connection
Convenient construction
Economic superiority
Strong durability

Application

Stainless steel butt weld fittings are widely used in multiple fields due to their excellent corrosion resistance and high strength.
Petrochemical Industry
Nuclear Power
Mechanical
Medical Equipment

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Butt weld tee is widely used in fluid control and transportation systems. At the same time, it can also be used in fields such as water supply, drainage, and heating.

Standards for stainless steel butt weld tee cover multiple aspects. These standards collectively ensure that the quality and performance of butt weld tee. The common American standard production standard is ASME B16.9; The material standard is ASTM A403.

Types of Stainless Steel Butt Weld Tee

According to ends diameter, stainless steel butt weld tees can be divided into equal tees and reducing tees. Equal tee is three ends with the same diameter, while differential diameter tee is the ends with different diameters.

Material Standard

Stainless steel butt weld tee has excellent corrosion resistance, high strength, and good processing performance. ASTM A403 standard is a specification developed by the (ASTM) for the design, manufacturing, austenitic and ferritic stainless steel fittings. Common stainless steel materials include ASTM A403 WP304 and WP316.

Chemical Composition of Stainless Steel Butt Weld Tee

Mechanical Properties

Production Standards

The production standards for stainless steel butt welded tees involve multiple aspects, including materials, dimensions, manufacturing processes, and quality control. ASME B16.9 is a standard developed by the (ASME) and is one of the widely recognized stainless steel pipe fitting manufacturing standards internationally. It specifies the requirements for the size, material, pressure rating, marking, and inspection of stainless steel butt weld tees.

ASME B16.9 Butt Weld Tee Specification

Stainless Steel Butt Weld Tee Dimension List

Manufacturers of stainless steel butt weld tees need to produce accordance with standards to ensure that the products meet requirements.
ZIZI ENGINGEERING CO LTD specializes in the processing and sales of pipes and fittings, strictly producing and processing stainless steel pipes in accordance with standards such as ASME B16.9 and ASTM A403. We look forward to sincere cooperation with every customers to create brilliance together.

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According to the shape, stainless steel tees can be divided into equal tee and reducing tee.

Stainless steel Equal tee with the same outer diameter for main and branch pipes. Reducing tee refer different diameters between the main and branch pipes.In this article,we will introduce stainless steel equal tee.

How to Classify Stainless Steel Equal tee

Stainless steel equal tee can be classified according to different connection methods. Such as butt weld tee, threaded tee and socket tee.

Stainless Steel Butt Weld Tee

Stainless steel butt weld tees are pipe fittings that connect the main and branch pipes through welding, thereby achieving branch connections in the pipeline system. Due to its good sealing performance at the welded joints and low risk of leakage, it is widely used in various pipeline systems.

Dimension of ASME B16.9 Butt Weld Tee

Stainless Steel Threaded Tee

Stainless steel threaded tee is a pipeline accessory made of stainless steel material forged and connected through threaded connection. It’s characteristics include strong corrosion resistance, easy installation, low maintenance cost. They are suitability for small diameter high-pressure pipeline systems below 4 inches.

Dimension of ASME B16.11 Threaded Tee

Stainless Steel Socket Weld Tee

The socket connection method makes the installation process of stainless steel socket tees relatively simple. After inserting the connecting fittings into each end of the tee, they can be fixed by welding or fusion. Without the need for complex processes and tools, improving installation efficiency.

Dimension of ASME B16.11 Socket Weld Tee

Material Feature of Stainless Steel

Stainless steel tees are produced using stainless steel as the raw material. Common stainless steel materials include SS304, SS316, SS321, etc. At the same time, its environmental and health characteristics also meet the requirements of sustainable development in modern society.

Chemical Composition

Mechanical Properties

Application

Raw Material Transportation

Chemical Process Transportation

HVAC System

Water Supply System

Drainage System

Sewage Treatment System

Fresh Water System

Fire Protection System

Automotive Piping

Air Conditioning System

Food Processing

Stainless steel equal tees are widely used in multiple industries. Meanwhile, its diverse sizes and specifications, as well as flexible connection methods, also meet the needs of different pipeline systems.

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What is Carbon Steel Butt Weld Tee

Carbon steel butt weld tee has a 90 degree branch and a straight line pipe that will provide a connection to install another device for the pipeline systems.

We made carbon steel butt weld tee by wrought materials in both seamless and welded construction. Welding the tee fittings to the pipe causes it to be leak-proof, adds strength, utilizes a small amount of space and minimizes the possibility of erosion and corrosion

Carbon Steel Butt weld Tees conform to ASTM A234.

Both straight and reducing Carbon Steel Butt weld Tees are stocked.

Supply Range

Standard: ASME B16.9 ; EN10253-2

Size: 1/2″, 1″, 2″, 3″, 4″, 6″, 8″, 10″, 12″, 16″, 20″, 24″ to 80″

Schedule: Sch 20, STD, Sch 40, XS, Sch 80, Sch 100, Sch 120, Sch 140, Sch 160, XXS

End: Plain (PE)  or Bevel (BE)

Surface: Blasting and Painting, PE Coating, Hot Dip Galvanized.

ASME B16.9 Tee of Various Sizes and Shapes

ASME B16.9 carbon steel butt weld tee with three outlets in same or different size and named as equal tee and reducing tee. The connecting ends are in same sizes, called equal tee, while branch size is smaller than run pipe size, we call it as reducing tee. Butt welding tee is widely used in petroleum, chemical industry,  power plant and other industrial pipelines. The common used material are carbon steel A234 WPB.

Features of Equal Tee

Equal Tee (or straight tee), means the branch diameter of this tee is same with the main pipe (Run pipe) diameter of this tee.

There are three ends in a ‘T’ formed pipe tee.

Equal tees which have the same size openings.

Equal tee make them open of various size and two openings of the same size.

An equal tee utilises pressure fittings on two or more finishes.

An equal tee has a strong opening. This opening is utilised as a part of conjunction with a strong fitting for a get out an opening on a drain pipe.

Features of Reducing Tee

Reducing Tee is a T-shaped pipe fitting with two outlets that cut at 90 degrees to the main line. These tees are available with a combination of diverse outlet sizes.

Reducing tee make them open of various size and two openings of the same size.

A reducing tee has dragged to attach the fitting to a divider or stud.

A reducing tee utilises pressure fittings on two or more finishes.

A reducing tee has a strong opening. This opening is utilised as a part of conjunction with a strong fitting for a get out an opening on a drain pipe.

Dimension of Carbon Steel Butt Weld Tee

ASME B16.9 Carbon Steel Butt Weld Tee Weight List

Carbon Steel Pipe Tee

Chemical Composition

Mechanical Property

Carbon Steel Butt Weld Tee Grades Material

ASTM A234 WPB

ASTM A420 WPL6

A860 WPHY42

ASTM A860 WPHY 52

ASTM A860 WPHY 60

ASTM A860 WPHY 65

The Advantages of Butt Weld Fittings

Durable

Leak proof

Increase connection strength

Reduce corrosion and wear

A welded system use space as economically as possible

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