Scrap Identification, Isolation and Disposal for Clad Welding Components

1. Definition and Principles

Scrap identification, isolation, and disposal is a critical non-conformance management procedure within the quality assurance framework of bimetallic cladding and weld overlay manufacturing. It defines the systematic protocol for identifying, physically segregating, documenting, and ultimately disposing of or recovering welding components—whether clad plates, clad pipes, weld overlay deposits, or composite assemblies—that have been judged as defective, non-conforming, or unfit for continued processing or delivery.

The fundamental principle governing this process is the zero-tolerance policy against misidentification and cross-contamination. In bimetallic cladding operations involving dissimilar material combinations such as carbon steel with 309L/310 stainless steel transition layers, or low-carbon steel with copper, nickel, or titanium overlay deposits, the consequences of a single non-conforming component entering downstream processing can be catastrophic. A rejected weld overlay plate with incomplete fusion at the interface, excessive dilution exceeding ASTM A377 limits, or hydrogen-induced cracking that was not detected during initial NDT can compromise the entire heat exchanger, pressure vessel, or pipeline section in which it is ultimately incorporated.

The identification and disposal protocol operates on three foundational principles:

Immediate Action Principle: Upon determination of non-conformance by authorized quality personnel, the component must be flagged and segregated without delay—ideally within the same production shift—to eliminate any window of opportunity for accidental downstream processing.
Traceability Principle: Every scrap event must be recorded in a permanent ledger with full traceability back to the original material heat number, weld procedure specification (WPS), welding operator qualification, NDT method and results, and the specific reason for rejection.
Compliance Principle: Disposal of non-conforming materials must comply with applicable environmental regulations, hazardous waste management standards, and contractual obligations specified in customer purchase orders and applicable codes such as ASME BPV Code Section VIII, API 5L, or NACE standards.

2. Category and Business Positioning

Within the comprehensive capability matrix of Cladding Technology Shanxi Co., Ltd., the scrap identification and disposal procedure occupies a unique and indispensable position as a cross-cutting quality gate that intersects all three primary technology routes: TIG/MIG weld overlay, hydraulic explosive bonding (hydraulic explosion welding), and explosion welding (air detonation welding). Unlike process-specific capabilities such as weld overlay deposition rate optimization or explosion welding plate velocity control, the scrap management protocol serves as a universal quality safeguard applicable at every stage of the manufacturing lifecycle—from incoming material inspection through final product release.

In the context of the company's organizational quality management system aligned with ISO 9001:2015 requirements (particularly Clause 8.7 "Control of Nonconforming Outputs"), this procedure fulfills the following business functions:

Quality Assurance Gate: Acts as the final physical barrier preventing non-conforming clad components from reaching the customer, thereby protecting the company's reputation and contractual standing.
Material Control Mechanism: Ensures that base materials, cladding materials, and partially processed components are accurately tracked, preventing material mix-ups that could lead to costly rework or delivery failures.
Cost Containment Tool: Enables recovery of salvageable materials (base steel, partially deposited overlay layers) for reuse in subsequent production runs, directly reducing waste costs and improving yield rates.
Regulatory Compliance Instrument: Provides documented evidence of proper hazardous waste handling and disposal for components containing toxic materials such as chromium-bearing stainless steel, nickel alloys, or copper-tin bronze overlays.

3. Technical Purpose and Value

The primary technical purpose of the scrap identification, isolation, and disposal procedure is material control—ensuring that only conforming, fully qualified clad welding components proceed through the manufacturing value chain. This purpose is realized through several quantifiable value contributions:

3.1 Prevention of Field Failures and Safety Incidents

In high-pressure and high-temperature service environments—such as petrochemical reactors operating under ASME Section VIII Div. 2 rules, nuclear-grade pressure boundaries governed by NB/T 20342, or sour gas pipelines subject to NACE MR0175/ISO 15156 requirements—the integrity of the cladding interface is non-negotiable. A single rejected component that bypasses the scrap protocol and is incorporated into a pressure boundary can result in catastrophic failure, environmental release, and loss of life. The scrap identification procedure directly mitigates this risk by enforcing physical and administrative barriers.

3.2 Customer Confidence and Contractual Compliance

End customers in the oil and gas, power generation, and chemical processing industries require demonstrable evidence of rigorous quality control. The documented scrap identification and disposal records serve as audit evidence during customer factory inspections (FAT/SAT), third-party certification audits (e.g., API Q1, ASME U Stamp certification), and regulatory inspections. A well-maintained scrap ledger demonstrates that the manufacturer exercises full control over non-conforming outputs, which is a prerequisite for maintaining supplier qualification status.

3.3 Yield Rate Optimization and Cost Reduction

Through systematic segregation of salvageable components, the procedure enables material recovery that can reduce overall production costs by 5–15% depending on the technology route. For example, a rejected hydraulic explosive bonded plate with localized interface defects may be cut to remove the defective zone, and the remaining conforming sections can be requalified and utilized in less critical applications. Similarly, base steel recovered from a scrapped weld overlay assembly can be returned to inventory for reuse.

4. Key Process and Implementation Points

4.1 Scrap Identification and Judgment Authority

The scrap determination is made by authorized quality personnel based on objective, code-mandated acceptance criteria. The following table outlines the typical rejection triggers across the company's technology routes:

Technology Route	Common Rejection Criteria	Governing Standard
TIG/MIG Weld Overlay	Interface incomplete fusion (UT/MT), dilution exceeding ASTM A377 limits, HAZ cracks (PT/ET), overlay thickness out of tolerance	ASTM A377, ASME Section IX, GB/T 12467
Hydraulic Explosive Bonding	Interface bonding ratio below specified minimum (typically ≥95%), laminar defects, interfacial delamination, plate flatness out of tolerance	ASTM A402, GB/T 18507, EN 15631
Explosion Welding (Air Detonation)	Insufficient bonding ratio, excessive interfacial oxide inclusion, plate waviness, thickness deviation beyond tolerance	ASTM A402, GB/T 18507, EN 15631
All Routes — Post-Processing	Corrosion testing failure (ASTM A923), erosion testing failure (ASTM G65), hardness profile non-conformance, dimensional deviation	ASTM A923, ASTM G65, ASME Section VIII

4.2 Immediate Red Identification Marking

Upon scrap determination, the component must be immediately marked with a standardized red identification label containing the following information:

Unique scrap identification number (traceable to the scrap ledger)
Date and time of rejection
Name and signature of the authorizing quality inspector
Specific non-conformance description and reference to the applicable standard or specification
Original material heat number and component serial number
Technology route identifier (Weld Overlay / Hydraulic Explosive / Air Detonation)
Disposal disposition code (Salvage / Hazardous Waste / Scrap Metal / Return to Supplier)

The red label must be affixed in a location that is visible from all sides of the component and cannot be removed without damage. For flat clad plates, the label is applied to the cladding surface with high-adhesion industrial labeling tape. For cylindrical components such as clad pipes, the label is applied at the longitudinal weld seam area. For small components, a red tag attached with tamper-evident cable ties is used.

4.3 Physical Isolation

Red-identified scrap components must be physically moved to a designated quarantine area within the facility, separated from conforming material by physical barriers (fencing, locked cages, or dedicated floor-marked zones). The quarantine area must satisfy the following requirements:

Access Control: Only authorized quality and production planning personnel may enter the quarantine area. Access is logged electronically or via paper sign-in sheets.
Environmental Protection: The quarantine area must be covered or drained to prevent corrosion of salvaged materials and to contain any hazardous substances (e.g., chromium residues from stainless steel grinding). The area must comply with local environmental regulations and GB 18597 for hazardous waste storage.
Segregation by Disposition Category: Within the quarantine area, materials are further segregated by intended disposition: salvageable base steel, salvageable cladding material, hazardous waste, and general scrap metal.
Security: The quarantine area must be secured against unauthorized removal, particularly for high-value cladding materials such as nickel alloys (Inconel, Hastelloy), titanium, and copper-tin bronze.

4.4 Scrap Ledger Registration

Every scrap event must be recorded in a permanent, tamper-evident scrap ledger (maintained both in physical and electronic format) within 24 hours of the rejection determination. The ledger must contain the following minimum data fields:

Ledger Field	Description	Example
Scrap ID Number	Sequential unique identifier	SCR-2024-0387
Component Description	Type, dimensions, material specification	Clad plate, 2000×1000×12mm, CS+309L
Heat Number (Base)	Metallographic traceability reference	HB-2024-0721
Heat Number (Clad)	Metallographic traceability reference	CL-2024-0156
Technology Route	Manufacturing process used	TIG Weld Overlay (WPS-309L-004)
Rejection Reason	Specific non-conformance	Interface incomplete fusion at 150mm from edge
NDT Method & Result	Test that identified the defect	UT per ASTM E165, Type II indication
Disposition	Final handling decision	Edge trim 300mm, requalify per WPS-309L-004
Authorized By	Name and signature of approver	Wang Lei, Quality Manager
Date	Date of rejection and disposition	2024-03-15

4.5 Salvage and Material Recovery

Where portions of a rejected component are determined to be salvageable, the following recovery procedure is implemented:

Engineering Review: A qualified engineering team reviews the defect location, extent, and nature to determine whether material recovery is technically feasible and whether the recovered material can meet the acceptance criteria of the intended downstream application.
Defect Mapping: The exact location and dimensions of the non-conforming zone are marked on the component using permanent marking paint or scribe marks, with a minimum 50mm safety margin beyond the identified defect boundary.
Controlled Cutting: Salvage cutting is performed using qualified cutting procedures (plasma cutting, oxy-fuel cutting, or sawing) to avoid introducing additional defects such as heat-affected zone sensitization or mechanical damage. For weld overlay components, cutting must be performed on the base material side to preserve the integrity of the overlay layer.
Separate Identification: Recovered cladding material and base material are identified separately with new material tags referencing the original heat number, the scrap ID number, and a "RECOVERED" designation.
Requalification: Recovered materials must undergo full requalification testing appropriate to their intended use before being returned to inventory. For weld overlay recovered material, this includes visual inspection (VT), magnetic particle testing (MT) per ASTM E709, and dimensional verification.
Inventory Return: Requalified recovered materials are entered into the material inventory system with a "RECOVERED" flag, ensuring they are tracked separately from virgin material and can be audited for original provenance.

4.6 Non-Recoverable Material Disposal

Materials determined to be non-salvageable are disposed of according to their material classification:

Material Category	Examples	Disposal Method	Regulatory Reference
Hazardous Waste	Components with heavy metal contamination, toxic coating residues, or contaminated with hazardous chemicals	Transport to licensed hazardous waste disposal facility with transfer manifest	GB 18597, GB 5085, Local Environmental Protection Bureau regulations
Scrap Metal (Ferrous)	Carbon steel base material, low-alloy steel components	Sale to licensed scrap metal recycler with weight ticket and material certification	GB/T 4223, Local scrap metal management regulations
Scrap Metal (Non-Ferrous)	Nickel alloys, titanium, copper, aluminum	Sale to licensed non-ferrous scrap recycler with segregated handling	GB/T 4223, Non-ferrous metal scrap management regulations
Return to Supplier	Material with inherent manufacturing defect (e.g., laminations in base plate)	Return with non-conformance report, material certificate, and photographic evidence	ISO 9001:2015 Clause 8.7, Supplier quality agreement

5. Applicable Standards and Acceptance Criteria

5.1 Quality Management System Standards

ISO 9001:2015 — Clause 8.7 "Control of Nonconforming Outputs" mandates that organizations establish a documented process for identifying, controlling, and documenting non-conforming products, including segregation, identification, and authorization for use, rework, or scrap.
ASME BPV Code Section VIII Division 1 — UG-99 requires that non-conforming materials and components be identified, segregated, and dispositioned under the authority of the Authorized Inspector.
API Q1 (9th Edition) — Requires documented procedures for nonconformance management including identification, isolation, evaluation, and disposition of nonconforming product.
NB/T 20342 — Nuclear power industry quality assurance standard requiring traceable non-conformance reporting and disposition.

5.2 Material and Process Standards

ASTM A377 — Standard Specification for Clad Plate for High-Temperature Service; defines acceptance criteria for weld overlay clad plates including dilution limits, overlay thickness, and interface integrity.
ASTM A402 — Standard Specification for Explosive Welded Clad Plate; defines bonding ratio requirements (typically ≥95% by weight), interface quality, and dimensional tolerances.
GB/T 18507 — Chinese national standard for explosion welded clad steel plates, specifying bonding ratio, interface quality, and testing methods.
GB/T 12467 — Chinese national standard for weld overlay deposits, specifying deposition efficiency, dilution rate, and microstructural requirements.
ASME Section IX — Qualification of Welding Procedures and Welders; provides the framework for WPS qualification and welder performance qualification that underpins the acceptance criteria used in scrap determination.

5.3 Non-Destructive Testing Standards

ASTM E165 — Standard Practice for Contact Ultrasonic Examination of Weldments; defines UT acceptance criteria for weld overlay interfaces.
ASTM E709 — Standard Practice for Magnetic Particle Testing; defines MT acceptance criteria for surface and near-surface defects in ferromagnetic materials.
ASTM E1417 — Standard Practice for Liquid Penetrant Examination; defines PT acceptance criteria for surface-breaking defects in non-ferromagnetic cladding materials.
GB/T 11345 — Chinese national standard for ultrasonic testing of welds, specifying acceptance levels and reference block calibration.

5.4 Environmental and Waste Management Standards

GB 18597 — Standard for identification of hazardous waste; provides the criteria for classifying materials as hazardous waste requiring special disposal procedures.
GB 5085 — Identification standards for hazardous waste, including criteria for toxicity, corrosivity, reactivity, and infectiousness.
GB 18599 — Pollution control standard for general industrial solid waste storage and disposal sites.

6. Common Risks and Controls

6.1 Risk: Misidentification and Cross-Contamination

Risk Description: A non-conforming component is not properly identified or is identified but the label is removed, damaged, or overlooked, allowing the component to enter downstream processing or be shipped to the customer.

Controls:

Implement a dual-identification system: red label plus physical marking (e.g., red paint stencil "SCRAP" on the component surface).
Use tamper-evident labels that cannot be removed without visible damage.
Conduct shift-end audits of the quarantine area by a different quality inspector than the one who performed the original rejection.
Implement a "two-person verification" rule for any movement of material from the quarantine area.

6.2 Risk: Inadequate Physical Isolation

Risk Description: The quarantine area is not adequately separated from production areas, allowing visual or physical confusion between conforming and non-conforming material.

Controls:

Maintain minimum 3-meter separation between the quarantine area and active production zones, with physical fencing.
Use color-coded floor markings: red for quarantine area, green for conforming material staging area.
Install signage at multiple points indicating the quarantine area and restricted access.
Implement a daily visual audit checklist for the quarantine area maintained by the production supervisor.

6.3 Risk: Incomplete or Inaccurate Ledger Documentation

Risk Description: Scrap events are not recorded in the ledger, or the recorded information is incomplete, making traceability and root cause analysis impossible.

Controls:

Implement a mandatory electronic scrap registration system integrated with the company's ERP/QMS platform, requiring all ledger fields to be completed before the system accepts the entry.
Conduct monthly internal audits of the scrap ledger against physical quarantine area inventory to verify completeness and accuracy.
Require the Quality Manager's digital signature for all scrap ledger entries, with escalation to the Plant Manager for entries exceeding a defined value threshold (e.g., ¥50,000 material value).

6.4 Risk: Improper Disposal of Hazardous Materials

Risk Description: Non-conforming components containing hazardous materials (e.g., chromium-containing stainless steel dust, cadmium-bearing coatings) are disposed of as general scrap metal, violating environmental regulations and exposing workers and the environment to toxic substances.

Controls:

Implement a mandatory hazardous material classification step in the scrap disposition workflow, requiring consultation with the company's EHS (Environment, Health & Safety) department before any material leaves the quarantine area.
Maintain an up-to-date inventory of all cladding materials used in production, including their hazardous material classifications per GB 18597.
Establish contractual relationships with licensed hazardous waste disposal facilities, with transfer manifests retained for a minimum of 5 years per regulatory requirements.
Train all production and quality personnel annually on hazardous material identification and handling procedures.

6.5 Risk: Salvage Material Requalification Failure

Risk Description: Material recovered from a scrapped component fails requalification testing, resulting in additional waste and cost that was not anticipated in the original salvage decision.

Controls:

Require a formal engineering review and sign-off before any salvage cutting is performed, with the review documenting the expected requalification requirements and acceptance criteria.
Perform a "trial cut" on a representative section before full-scale salvage, followed by complete NDT and mechanical testing of the trial cut section.
Maintain a salvage success rate metric tracked monthly by the Quality Department, with a target of ≥80% first-pass requalification success. Trends below target trigger a root cause investigation.

7. Application Scenarios Across the Company's Technology Routes

7.1 TIG/MIG Weld Overlay Route

In the TIG/MIG weld overlay manufacturing process, scrap identification and disposal is particularly critical due to the inherent variability of the welding process and the sensitivity of the cladding interface to process parameters. Typical scrap scenarios include:

Interface Incomplete Fusion: Detected during UT examination per ASTM E165, typically at the base-to-overlay interface. The affected zone must be identified, marked, and either ground out and re-welded (if the remaining overlay thickness is adequate per ASTM A377) or the component is scrapped.
Excessive Dilution: Spectrographic analysis reveals that the dilution rate exceeds the maximum specified in the WPS or ASTM A377. The entire component may need to be scrapped if the dilution is uniform, or the affected area may be ground out and re-deposited if localized.
HAZ Cracking: Detected by MT or ET, particularly in high-carbon equivalent base materials. The cracked component is typically scrapped in full, as HAZ cracking indicates a systemic metallurgical incompatibility that cannot be reliably remedied by local repair.
Overlay Thickness Non-Conformance: Post-weld dimensional inspection reveals that the overlay thickness is below the minimum specified in the purchase order or ASTM A377. If the deficiency is localized, the component may be trimmed and requalified. If uniform, additional weld passes are added (if within WPS parameters) or the component is scrapped.

In this route, the salvage potential is generally higher because the base material (carbon steel or low-alloy steel) retains full value, and the overlay material (stainless steel, nickel alloy) can often be recovered and re-deposited on new base material, provided it has not been contaminated or degraded by the rejection event.

7.2 Hydraulic Explosive Bonding Route

Hydraulic explosive bonding (hydraulic explosion welding) produces clad plates with a metallurgical bond interface that is highly dependent on precise control of the hydraulic pressure, charge geometry, and impact velocity. Scrap scenarios specific to this route include:

Insufficient Bonding Ratio: Interface examination (destructive testing per ASTM A402 or GB/T 18507) reveals a bonding ratio below the specified minimum (typically ≥95%). If the unbonded area is localized and the remaining bonded area meets minimum size requirements, the component may be trimmed and requalified. If the unbonded area is extensive, the component is scrapped.
Laminar Defects: Internal laminations detected in the base material during UT examination render the entire component non-conforming. The base plate is typically scrapped, but the cladding material (if undamaged) may be recovered for reuse on a new base plate.
Plate Waviness/Flatness Non-Conformance: Post-welding dimensional inspection reveals waviness exceeding the tolerance specified in ASTM A402 or the purchase order. If the waviness is correctable through mechanical flattening without damaging the bond interface, the component may be reworked. Otherwise, it is scrapped.
Interfacial Oxide Inclusions: Metallographic examination reveals excessive oxide inclusions at the bond interface, indicating inadequate surface preparation or charge configuration. The component is typically scrapped in full, as oxide inclusions cannot be reliably removed without destroying the bond.

In this route, the salvage potential is moderate. The base plate is often fully salvageable (as a new base plate), but the cladding material may be damaged by the explosion process and require requalification or may be entirely lost. The scrap identification procedure must ensure that cladding material from failed bonds is carefully evaluated before being returned to inventory.

7.3 Explosion Welding (Air Detonation) Route

Explosion welding using air detonation charges produces clad plates with characteristics similar to hydraulic explosive bonding but with different process dynamics. Scrap scenarios include:

Variable Bonding Quality: Air detonation welding can produce more variable bonding quality across the plate surface compared to hydraulic explosive bonding. If the bonding ratio is below specification in a localized zone, the component may be trimmed. If the bonding quality is uniformly poor, the component is scrapped.
Excessive Plate Deformation: The higher energy input of air detonation can cause more significant plate deformation. If the deformation exceeds the tolerance specified in ASTM A402 or GB/T 18507 and cannot be corrected by rolling or pressing, the component is scrapped.
Thickness Deviation: Post-welding thickness measurement reveals deviations exceeding the tolerance. If the deviation is localized (e.g., thinning at the impact zone), the affected area may be trimmed. If uniform, the component is scrapped.

In this route, the scrap identification procedure must pay particular attention to the safety aspects of handling components that may have residual explosive material or damaged charge housings. The quarantine area for explosion welding scrap must be designed to accommodate the physical characteristics of these components, which may be significantly warped or deformed.

8. Contribution to Qualification Building, Product Delivery, and Customer Value

8.1 Qualification Building

The scrap identification and disposal procedure is a prerequisite for maintaining and expanding the company's qualification portfolio across multiple certification schemes:

ASME U Stamp / UG Stamp Certification: The ASME Code requires that the manufacturer demonstrate a documented non-conformance management system as part of the authorization audit. The scrap ledger and quarantine procedures provide the audit evidence required to maintain the U Stamp.
API Q1 Certification: API Q1 requires a documented nonconformance management procedure that includes identification, isolation, evaluation, and disposition. The company's scrap procedure directly satisfies this requirement.
NB/T 20342 Nuclear Quality Assurance: Nuclear power industry certification requires the most stringent non-conformance management, including independent review of all scrap dispositions by a quality assurance representative. The procedure's documentation rigor supports nuclear-grade qualification.
ISO 9001:2015 Certification: The scrap procedure is a core element of the quality management system, and its effective implementation is verified during surveillance and recertification audits.

8.2 Product Delivery Reliability

By preventing non-conforming components from reaching the customer, the scrap procedure directly contributes to on-time, in-full, and error-free product delivery. The financial and reputational cost of a single field failure attributable to a non-conforming clad component far exceeds the cost of scrapping that component during manufacturing. Industry data indicates that the average cost of a field failure in a pressure vessel application ranges from ¥500,000 to ¥5,000,000 depending on the severity of the failure, compared to the manufacturing cost of a single clad plate component, which typically ranges from ¥5,000 to ¥100,000.

Furthermore, the procedure's emphasis on salvage and material recovery directly supports delivery schedules by reducing the lead time associated with material procurement. Recovered materials can be deployed to production within days rather than the weeks or months required for new material procurement, qualification, and delivery.

8.3 Customer Value Enhancement

The scrap identification and disposal procedure delivers measurable value to customers in several dimensions:

Quality Assurance: Customers receive documented evidence that every component in their order has passed all applicable acceptance criteria and that any non-conforming material has been identified, segregated, and disposed of. This reduces the customer's incoming inspection burden and accelerates their production schedule.
Traceability: The scrap ledger provides full traceability of all material used in the customer's order, supporting the customer's own quality management system requirements and regulatory compliance obligations.
Cost Optimization: By recovering salvageable materials, the company reduces its production costs, enabling competitive pricing while maintaining quality. This directly benefits the customer through lower procurement costs.
Environmental Stewardship: The procedure's emphasis on material recovery and compliant disposal demonstrates the company's commitment to environmental responsibility, which is increasingly important to customers with corporate sustainability mandates.

9. Implementation Checklist and Best Practices

To ensure consistent and effective implementation of the scrap identification, isolation, and disposal procedure, the following checklist should be used as a daily operational tool:

Verification of Red Label Application: Confirm that all components identified as scrap bear a legible, tamper-evident red label with complete information.
Quarantine Area Integrity: Verify that the quarantine area is physically separated, properly signed, and free of conforming material.
Ledger Completeness: Confirm that all scrap events from the previous shift have been recorded in the ledger with all required fields completed.
Disposal Tracking: Verify that all components scheduled for disposal have been removed from the quarantine area and that transfer manifests or weight tickets are on file.
Salvage Requalification Status: Review the status of all materials in the salvage pipeline and escalate any items pending requalification for more than 5 business days.
Training Compliance: Confirm that all personnel involved in the scrap process have completed current training and are aware of the procedure's requirements.
Monthly Metrics Review: Compile monthly scrap rate data by technology route, material type, and defect category, and present to the Quality Committee for trend analysis and corrective action planning.

Key Performance Indicators:

Scrap identification response time: ≤1 hour from defect detection to red labeling

Ledger registration completion: 100% within 24 hours of rejection

Quarantine area audit compliance: ≥98% pass rate on monthly audits

Salvage requalification first-pass success rate: ≥80%

Hazardous waste disposal compliance: 100% with transfer manifests retained ≥5 years

Scrap rate trend: Decreasing quarter-over-quarter, with root cause analysis for any increase >5% month-over-month

10. Conclusion

The scrap identification, isolation, and disposal procedure is not merely an administrative formality but a fundamental quality engineering discipline that underpins the entire manufacturing capability of Cladding Technology Shanxi Co., Ltd. Its rigorous implementation ensures that the company's three technology routes—TIG/MIG weld overlay, hydraulic explosive bonding, and explosion welding—produce components that meet the exacting standards required by the oil and gas, power generation, chemical processing, and nuclear industries.

By enforcing immediate red identification, physical isolation, complete ledger documentation, systematic material recovery, and compliant disposal, the procedure creates a closed-loop quality management system that continuously improves product quality, reduces waste costs, and builds customer confidence. The procedure's integration with the company's broader quality management system, aligned with ISO 9001:2015, ASME BPV Code, API Q1, and NB/T 20342 requirements, positions the company as a qualified and reliable supplier of high-integrity clad welding components in the global market.