Haihao Group Delivers GOST 20# Carbon Steel Tees & Reducers to Singapore Client

At Haihao Group, delivering precisely engineered piping components that align with diverse global standards is central to every order we handle. Recently, we finalized the production of a specialized shipment of GOST standard tees and concentric reducers, manufactured to strict specifications for an industrial project in Singapore.

GOST standard Tees and Concentric Reducers made from 20# carbon steel with protective coating and marking ready for shipment

Navigating GOST Standards: Manufacturing Expertise You Can Rely On

For this project, the client required full compliance with GOST 17378, which governs dimensions and tolerances for steel pipe fittings in various industries. While ASME and EN specifications are common in international projects, the ability to manufacture GOST-compliant components demonstrates our flexibility and depth of standards knowledge.

All fittings were produced using 20# carbon steel, chosen for its dependable strength and weldability. This material is widely applied in process piping, power generation, and general industrial services.

Operator inspecting dimensions of GOST 17378 20# carbon steel Tee during production at Haihao Group workshop

Tees Tailored to Specific Flow Requirements

The order included a diverse range of pipe tees, each selected to fulfill different process needs:

ERW Tees: For example, the 57×3 mm ERW Tee and the 219×8 mm ERW Tee, offering consistent wall thickness and cost-effective solutions in non-critical services.

Equal Tees: Such as the 26.7×2.5 mm Equal Tee, designed for configurations where the branch line must match the main run diameter.

Unequal Tees: Including configurations like 33.4×2.5–26.7×2.5–33.4×2.5 mm and 42.2×2.8–26.7×2.5–42.2×2.8 mm, produced with precise branch offsets to help control flow direction and system pressure.

Each tee was carefully fabricated to maintain tight tolerances on outside diameter, wall thickness, and welding bevel dimensions.

Quality control specialist measuring wall thickness GOST 17378 carbon steel Concentric Reducer

Concentric Reducers Engineered for Smooth Transitions

Beyond the tees, the shipment included a selection of concentric reducers designed to maintain uniform flow alignment. These reducers ensure that transitions between pipe sizes occur concentrically, which helps prevent turbulence and pressure loss.

Notable reducer dimensions included:

Common sizes like 76×3–57×3 mm and 57×3–25×1.6 mm, frequently used in medium-pressure pipelines.

A large-diameter 530×12–426×10 mm (DN500–DN400) reducer, showcasing our capacity to deliver components for major pipeline installations.

Every reducer was produced in line with GOST 17378, with thorough inspection to confirm dimensional accuracy and material integrity.

Consistent Quality and Complete Documentation

From raw material selection to final inspection, quality control remained a top priority. Each piece underwent:

Dimensional inspection using calibrated tools.

Visual examination for surface defects, weld integrity, and proper marking.

Marking and traceability, including heat numbers and size codes.

To support the client’s documentation requirements, we supplied a full set of material certificates and inspection records. This transparent approach reduces uncertainty and simplifies final acceptance on site.

Addressing Common Client Concerns

Our experience tells us that clients working with GOST standards often share several priorities:

✅ Guaranteed Standard Compliance: Fittings must align precisely with GOST dimensions and tolerances to avoid assembly problems.
✅ Material Consistency: Full traceability of 20# carbon steel ensures reliable performance under design conditions.
✅ Clear Documentation: Detailed certificates and inspection reports help clients meet project audit requirements.
✅ Flexible Sizing: A broad product range reduces the need for multiple suppliers.

By approaching this order with attention to each of these areas, we provided not just fittings but a complete, verifiable solution.

A Reliable Partner for Complex Piping Projects

This shipment to Singapore highlights Haihao Group’s role as a trusted manufacturing partner for critical piping applications. Whether the requirement is GOST fittings in carbon steel, ASME-standard elbows and flanges, or custom-fabricated spools, our team has the experience and infrastructure to deliver on time and to specification.

If you’re planning a project that demands precise compliance with GOST 17378-2001—or any other standard—let us show you how our engineering expertise and thorough quality systems can help you stay on schedule and in control.

Contact us today to discuss your requirements and see how Haihao Group can support your success. Email:sales@haihaogroup.com