45 Tons SUS304 Stainless Steel Pipe Exported To Vietnam | Quality Inspection

If you are looking for a reliable SUS304 stainless steel pipe supplier for overseas projects, this Vietnam export case demonstrates how GNEE manages the complete supply process from order confirmation, material preparation, production, quality inspection, documentation, and international delivery.
In this project, GNEE successfully supplied 45 tons of SUS304 stainless steel pipes to a Vietnam customer, providing products manufactured according to customer specifications with full material traceability, inspection records, and export-standard packaging. Through strict quality control and professional export experience, we helped the customer receive stainless steel pipes that met project requirements on time.

 

What is SUS304 stainless steel pipe?

SUS304 stainless steel pipe is one of the most widely used austenitic stainless steels due to its excellent corrosion resistance, weldability, and durability. It is commonly utilized in industrial piping, food processing equipment, water supply systems, construction projects, and general engineering applications.

When purchasing stainless steel pipes, Vietnamese customers require not only competitive pricing but also reliable quality documentation, traceability, and stable supply capabilities. For instance, the ASTM A312 standard covers seamless and welded austenitic stainless steel pipes, specifying requirements for chemical composition, mechanical properties, heat treatment, and testing.

Order Parameter	Specification & Project Details
Client Industry	EPC Chemical Processing & Fluid Handling Project (Vietnam)
Material Grade	SUS304 / UNS S30400 / EN 1.4301 (Austenitic Stainless Steel)
Total Quantity	45 Metric Tons (Mixed Sizes: Seamless & Welded Stainless Steel Pipes)
Pipe Size Range	NPS 2" to NPS 12" (SCH 10S & SCH 40S)
Applicable Standards	ASTM A312 / ASTM A312M, ASME B36.19M
End Preparation	Plain Ends (PE) and 37.5° ± 2.5° Beveled Ends (BE) with Specified Root Face
Quality Inspection	PMI (Positive Material Identification), Dimensional Inspection, UT/PT Testing, Hydrostatic Testing, Eddy Current Testing
Quality Certification	EN 10204 Type 3.1 Mill Test Certificate (MTC) with Complete Heat Number Traceability
Delivery Term	CIF Haiphong Port, Vietnam
Production Lead Time	21 Days (Manufacturing, Quality Inspection, Export Packaging & Customs Documentation)

 

Why Clients Choose GNEE Stainless Steel: Solving Engineering and Procurement Pain Points

Before partnering with GNEE, the client's procurement team faced three major challenges within their existing supply chain:
Inconsistent dimensional tolerances: Previous suppliers delivered pipes with wall thickness deviations exceeding permissible limits (excessive negative tolerance), leading to misalignment issues during on-site welding.
Risk of intergranular corrosion: Inadequate solution annealing during manufacturing caused sensitization in high-temperature welding zones.
Tight project schedule: The construction timeline for the Vietnam project required the goods to arrive at the port within 25 days.

 

How GNEE Resolved These Challenges:

Strict tolerance assurance: Utilizing CNC sizing units, we ensured that wall thickness and outer diameter (OD) tolerances were strictly controlled within 10% of nominal dimensions.
Comprehensive solution annealing: Every SUS304 pipe underwent solution heat treatment at 1040°C–1100°C followed by rapid water quenching to restore optimal corrosion resistance.
Flexible inventory and production scheduling: Leveraging existing raw material stock and multiple production lines, we completed production and inspection within 18 days, providing an ample time buffer for subsequent customs clearance.

 

 

 Technical Confirmation Before Production

Before production started, GNEE's technical team reviewed the customer's requirements, including:
Stainless steel grade confirmation
Pipe dimensions
Quantity requirement
Surface finish
Length tolerance
Packing requirements
Inspection documents
This step helped ensure that production parameters matched the customer's application requirements before raw materials entered manufacturing.

 

 Raw Material Selection and Traceability Control

For the 45-ton SUS304 stainless steel pipe order, raw materials were selected according to the agreed specification.
Each batch of stainless steel material was controlled through:
Heat number identification
Chemical composition verification
Material traceability records
Production batch tracking
The heat number allows every pipe bundle to be connected with the original material information, including chemical composition and mechanical properties.
For international stainless steel buyers, EN 10204 3.1 Material Test Certificates are commonly used to document product identity, heat number, chemical analysis, mechanical test results, and inspection information.

 

 SUS304 Stainless Steel Pipe Manufacturing Process

During production, GNEE follows a controlled manufacturing process:
Raw Material → Pipe Forming → Welding / Seamless Processing → Heat Treatment → Surface Treatment → Inspection → Packing

Depending on customer requirements, SUS304 stainless steel pipes can be supplied with different surface conditions, including annealed, pickled, bright annealed, or polished finishes.

 

 Quality Inspection Before Shipment

Quality inspection is one of the most important steps before exporting stainless steel pipes.
For this 45-ton SUS304 stainless steel pipe shipment, GNEE performed inspection according to customer requirements.

Inspection Items Include:

Inspection Item	Purpose
Chemical Composition Test	Confirm SUS304 material elements
Mechanical Test	Verify strength and elongation
Dimension Inspection	Check OD, wall thickness, and length
Surface Inspection	Ensure smooth and defect-free surface
PMI Test	Confirm material grade
Hydrostatic / Eddy Current Test	Verify pipe integrity
Visual Inspection	Check appearance and marking

 Quality Documentation Provided to Vietnamese Customers

To facilitate project acceptance and ensure future traceability, GNEE provides comprehensive export documentation.
The documentation includes: Material Test Certificates (MTC), chemical composition reports, mechanical property reports, inspection reports, packing lists, commercial invoices, and Certificates of Origin (if required). Every shipment from GNEE is accompanied by these quality documents to assist customers in verifying material properties and compliance.

 

Analysis Item	Diameter	Length	Result
Dimension Analysis	Seamless pipe ordered size: 323.96.35 Actual measured size: 3246.39 Elbow ordered: 323.96.35 Elbow actual measured: 2366.6	Ordered length: 6000mmActual measured length: 6010mm	Measurement result: Passed
Visual Inspection Analysis	Smooth surface without obvious scratches, meets customer requirements.
Packaging Analysis	Pipe fittings packed in wooden cases, steel pipes packed in woven bags, compliant with requirements.
Marking Analysis	Each product is spray-marked, meets requirements.

 

Export Packaging: Ensuring Pipe Safety During Transit

Proper packaging is crucial for international shipments to prevent surface damage, moisture exposure, or deformation during sea transport.
For this 45-ton shipment destined for Vietnam, GNEE employed export-standard packaging methods: steel strapping for secure bundling, plastic protective film wrapping, waterproofing, pipe-end protection, clear product labeling, and container loading inspections.
Each bundle is marked with key information-such as material grade, dimensions, quantity, heat number, and production batch number-ensuring easy identification during unloading and installation.

The successful export of 45 tons SUS304 stainless steel pipes to Vietnam demonstrates GNEE's capability in handling international stainless steel projects with professional production management, strict quality inspection, complete documentation, and export-standard packaging.

From order confirmation to final shipment, GNEE provides a complete stainless steel supply solution for global industrial customers.

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