GOST 17376-2001 Seamless Equal and Reducing Tees Specification

Introduction

GOST 17376-2001 is a Russian national standard covering seamless butt-weld pipe fittings, including equal tees and reducing tees for industrial piping systems. The standard specifies detailed technical requirements such as dimensional tolerances, wall thickness, material grades, heat treatment conditions, and mechanical properties.

Seamless equal and reducing tees manufactured under GOST 17376-2001 are designed for high-pressure, high-temperature, and corrosive service environments. They are commonly applied in oil & gas pipelines, petrochemical plants, refinery systems, steam lines, and power stations across Russia and international markets.

What is GOST 17376-2001?

GOST 17376-2001 is the updated Russian standard covering seamless welded butt-weld fittings, including:

Equal Tee (Straight Tee)
Reducing Tee

The standard defines:

Dimensions and tolerances
Wall thickness requirements
Technical specifications
Material requirements
Mechanical performance

Compared with earlier versions, GOST 17376-2001 provides improved dimensional accuracy and updated technical requirements.

Product Types

Equal Tee

Equal tees have three outlets of the same diameter, used to split or combine flow equally in pipeline systems.

Reducing Tee

Reducing tees connect pipes of different diameters, allowing controlled flow distribution and system flexibility.

Manufacturing Process

GOST 17376-2001 seamless tees are produced by:

Hot forming from seamless pipe
Cold forming (for smaller sizes)
Precision machining of ends
Bevel preparation for butt welding

Seamless construction ensures:

Higher pressure resistance
Better structural integrity
Improved corrosion resistance

Available Materials

We supply GOST 17376-2001 tees in various materials:

Stainless Steel

GOST 17376-2001 12X18H10T Tee (AISI 321 equivalent)
GOST 17376-2001 08X18H10 (AISI 304 equivalent)
GOST 17376-2001 10X17H13M2T (AISI 316Ti equivalent)

Carbon Steel

20
09G2S

Alloy Steel

12X1MФ
15X5M

Custom materials are available upon request.

Size Range

DN15 – DN800
Standard wall thickness per GOST
Custom thickness available
Seamless construction

Surface condition: pickled, shot blasted, or anti-corrosion treated.

Applications

GOST 17376-2001 seamless tees are commonly used in:

Oil and gas pipelines
Refinery systems
Steam and boiler systems
Chemical plants
Power stations

They are suitable for medium and high-pressure systems requiring reliable welded connections.

Mechanical Properties

Mechanical performance depends on selected material grade. For example, stainless steel 12X18H10T typically provides:

Tensile Strength ≥ 520 MPa
Yield Strength ≥ 205 MPa
Excellent high-temperature resistance
Good weldability

Carbon steel grades provide strong pressure-bearing capacity for structural piping.

Testing & Inspection

All GOST 17376-2001 seamless equal and reducing tees undergo strict inspection procedures:

Material Testing

Chemical composition analysis
PMI testing

Mechanical Testing

Tensile testing
Hardness testing
Impact testing (if required)

Non-Destructive Testing (NDT)

Ultrasonic Testing (UT)
Radiographic Testing (RT)
Dye Penetrant Testing (PT)

Dimensional Inspection

Outside diameter measurement
Wall thickness verification
End bevel inspection

Material Test Certificate (MTC) EN 10204 3.1 / 3.2 is available.
Third-party inspection (SGS, BV, TUV) can be arranged upon request.

Why Choose Our GOST 17376-2001 Tees?

Strict compliance with Russian GOST standards
Seamless construction for high-pressure service
Full material traceability
Advanced forming equipment
Export packaging
Competitive factory pricing

GOST 17376-2001 seamless equal and reducing tees are essential components for industrial piping systems requiring durability, strength, and reliable welded connections. Manufactured in compliance with Russian standards and available in stainless steel, carbon steel, and alloy steel grades, they are widely trusted in demanding industrial applications.

GOST 17376-2001 standard Download

Click below to download gost-17376-2001 standard

Note: Research use only,Commercial use is prohibited.

If you want to use it ,you can buy from following link:
https://runorm.com/product/view/2/4906