Quality Inspection
Steel Quality Inspection & Pre-Shipment Verification
LYH Steel inspects steel products against the agreed purchase requirements before shipment, helping buyers reduce the risk of material, dimension, quantity, packing, and traceability discrepancies.
Inspection can cover MTC verification, PMI, dimensions, surface condition, quantity, weight, export packing, container condition, loading and seal records according to the order and inspection scope.
Inspection starts with the purchase specification
A measurement only becomes meaningful when it is compared with an agreed acceptance requirement. LYH Steel checks the inspection scope against the purchase order, product standard, drawings, dimensions, tolerances, surface requirements, packing requirements and buyer-defined checkpoints.
Grade, product form, standard, delivery condition, surface finish and processing requirements.
Thickness, width, length, OD, wall thickness, diameter, flatness and other agreed limits.
Quantity, labels, marks, protective film, export packing, loading and required inspection evidence.
Pre-Shipment Inspection
Pre-shipment inspection is performed after production and before cargo release. Depending on the agreed scope, inspection can be conducted by sampling or by checking all specified items.
Typical checkpoints
- Product type and ordered grade
- Quantity and shipment weight
- Dimensions and tolerance
- Visible surface condition and finish
- Marking and heat-number traceability
- Packing, labels and protection
- Required inspection photos and records
Shipment weight verification before export packing and release.
Steel Inspection Checklist
| Inspection Area | What We Verify | Typical Evidence / Tools | Buyer Purpose |
|---|---|---|---|
| Material identity | Grade, heat number, markings, MTC, batch traceability | MTC, heat number, product marking, PMI where required | Reduce material-mix and traceability risk |
| Quantity | Pieces, bundles, coils, tubes, bars or packages | Physical count and packing list | Confirm ordered quantity before shipment |
| Weight | Actual shipment or package weight | Weighing equipment / shipment record | Verify shipping quantity and documents |
| Dimensions | Thickness, width, length, OD, wall thickness, diameter | Micrometer, caliper, ultrasonic thickness gauge | Confirm ordered size and tolerance |
| Surface | Scratches, dents, pits, stains, finish consistency | Visual inspection and photos | Identify visible defects before dispatch |
| Packing & labels | Shipping marks, labels, wrapping, package condition | Visual check, photos, packing list | Support traceability and transit protection |
| Container loading | Container condition, placement, lashing, seal | Loading photos, container number, seal number | Reduce loading and transport discrepancies |
Dimension & Tolerance Inspection
Plate, Sheet & Coil
Thickness, width and other agreed dimensions are checked with suitable measuring tools.
Bar
Diameter, width, thickness or profile dimensions are checked according to the ordered bar type.
Pipe & Tube
Outside diameter and wall thickness can be checked using calipers, micrometers or ultrasonic thickness equipment where appropriate.
Dimension verification should be compared with the ordered standard and tolerance.
MTC & Traceability Verification
The Mill Test Certificate is cross-checked with the supplied material to support grade and batch traceability.
- Material grade / designation
- Heat or batch number
- Chemical composition listed on the certificate
- Mechanical properties listed on the certificate
- Applicable product standard and delivery condition, where stated
- Consistency between certificate, product marking and shipment identification
PMI Material Verification
Positive Material Identification (PMI) can be used as a rapid, non-destructive verification step for alloy identification and to help detect material mix-ups.
PMI is a verification tool and does not replace the full MTC or any laboratory testing required by the governing specification.
Handheld PMI verification can help confirm alloy identity and reduce material-mix risk.
Visual Inspection & Surface Condition
- Scratches, dents, pits, stains and visible damage
- Finish consistency where a finish is specified
- Protective film condition where applicable
- Edge condition and visible processing quality
- Marking and identification consistency
Packing & Label Verification
- Package quantity and bundle identification
- Shipping marks and labels
- Waterproof or protective wrapping where required
- Edge and corner protection where required
- Package stability for handling and container loading
Container Loading Supervision
LYH Steel supervises container loading to verify shipment identity, container condition, packing, cargo placement and sealing before departure.
Re-check shipment quantity and weight against shipping documents.
Verify package condition, marks, labels and identification before loading.
Check cleanliness, dryness and visible structural condition.
Monitor cargo placement, dunnage and lashing to reduce movement.
Record the container and seal number after loading is completed.
Export Packing & Loading Examples
What the Buyer Can Receive After Inspection
Photos of measured items, markings, packing and loading checkpoints where included in the agreed scope.
MTC and shipment identification information as required by the order.
Container number, seal number and loading evidence where container supervision is included.
Steel Quality Inspection FAQs
What is checked during a steel pre-shipment inspection?
The inspection scope can include material identity, quantity, weight, dimensions, surface condition, markings, MTC traceability, packing, labels and other requirements stated in the purchase order.
Can you check steel dimensions before shipment?
Yes. Depending on the product form, inspectors can check thickness, width, length, diameter, outside diameter, wall thickness and other agreed dimensional items using suitable measuring tools.
What is the difference between MTC verification and PMI?
MTC verification checks the supplied material against the mill certificate and traceability information. PMI is a separate rapid material-identification method that can help detect alloy mix-ups. PMI does not replace the full certificate or required laboratory testing.
What is checked during container loading supervision?
Typical checks include shipment quantity, package and label condition, container cleanliness and dryness, cargo placement, securing or lashing, and recording the container and seal number after loading.
Add Inspection Requirements to Your Steel RFQ
Send your material grade, product standard, dimensions, tolerance, surface requirement, quantity, packing requirement, destination and any inspection items that must be completed before shipment.