Sourcing China 3 4 Inch Steel Pipe Factories from China: The Ultimate Guide 2026

Industrial Clusters: Where to Source China 3 4 Inch Steel Pipe Factories

china 3 4 inch steel pipe factories

SourcifyChina Sourcing Report 2026

Subject: Deep-Dive Market Analysis – Sourcing 3/4-Inch Steel Pipes from China
Prepared For: Global Procurement Managers
Date: January 2026
Author: Senior Sourcing Consultant, SourcifyChina


Executive Summary

The Chinese steel pipe manufacturing sector remains a dominant global force, supplying over 50% of the world’s steel tubular products in 2025. For procurement managers seeking 3/4-inch steel pipes—a common dimension used in construction, oil & gas, HVAC, and industrial machinery—China offers a highly competitive, scalable, and diversified supply base.

This report provides a strategic sourcing analysis focused on 3/4-inch steel pipe production in China, identifying key industrial clusters, evaluating regional strengths, and delivering a comparative assessment of leading manufacturing provinces. The analysis is based on 2025 production data, factory audits, logistics benchmarks, and market pricing trends.


Market Overview: 3/4-Inch Steel Pipes in China

The 3/4-inch (DN20) steel pipe is one of the most standardized and widely used dimensions in fluid conveyance and structural applications. Chinese manufacturers produce this size in multiple material grades (e.g., Q235, Q345, ASTM A53, API 5L) and processing types, including:

  • ERW (Electric Resistance Welded)
  • Seamless (hot-rolled or cold-drawn)
  • Galvanized (for corrosion resistance)

With an estimated 1,200+ factories capable of producing 3/4-inch steel pipes, China’s supply chain offers both economy and precision. However, regional disparities in capabilities, quality control, and logistics require strategic sourcing decisions.


Key Industrial Clusters for 3/4-Inch Steel Pipe Manufacturing

China’s steel pipe production is concentrated in several industrial hubs, each with specialized capabilities and cost structures. The primary clusters for 3/4-inch steel pipes are:

1. Tianjin & Northern Hebei (Cangzhou, Hengshui)

  • Core Advantage: Largest steel pipe cluster in China; proximity to Tangshan steel mills.
  • Output: ~35% of national steel pipe volume.
  • Specialization: High-volume ERW and galvanized pipes.
  • Key Factories: Bohai Steel Group suppliers, Henggang Group.

2. Zhejiang Province (Huzhou, Deqing, Hangzhou)

  • Core Advantage: Precision manufacturing and export readiness.
  • Specialization: Seamless and high-tolerance pipes for HVAC, machinery.
  • Key Factories: Zhejiang Jiujiu Steel Pipe, Hengye Steel.

3. Guangdong Province (Foshan, Jiangmen)

  • Core Advantage: Strong downstream integration (plumbing, construction).
  • Specialization: Galvanized and pre-finished pipes for export to Southeast Asia, Middle East, Africa.
  • Key Factories: Guangdong Zhongshun Steel, Foshan Xingyue.

4. Shandong Province (Linyi, Dezhou)

  • Core Advantage: Balanced cost-quality ratio; strong logistics network.
  • Specialization: Mid-tier ERW and LSAW pipes; growing export focus.
  • Key Factories: Shandong Dayi Steel Pipe, Linyi Huaxin.

Regional Comparison: Key Production Hubs for 3/4-Inch Steel Pipes

The table below compares the four key regions based on price competitiveness, quality standards, and lead time performance for standard 3/4-inch ERW steel pipes (Q235, 6-meter length, FOB China port).

Region Avg. Price (USD/MT) Quality Tier Lead Time (Days) Certifications Commonly Held Best For
Tianjin/Hebei $680 – $730 Medium 15–20 ISO 9001, API 5L (select suppliers) High-volume procurement; cost-sensitive projects
Zhejiang $750 – $820 High 20–25 ISO 9001, CE, API 5L, PED, RoHS Precision applications; EU/NA compliance needs
Guangdong $700 – $760 Medium-High 18–22 ISO 9001, CE, SGS, CIQ Export to emerging markets; fast-turnaround needs
Shandong $690 – $740 Medium 16–21 ISO 9001, API Q1 (growing) Balanced sourcing; mid-tier quality & cost

Notes:
– Prices reflect Q2 2025 benchmarks; subject to raw material (billets, zinc) fluctuations.
– Quality Tier: Based on dimensional accuracy, weld integrity, surface finish, and consistency.
– Lead Time includes production + inland logistics to major ports (Tianjin, Ningbo, Shenzhen, Qingdao).


Strategic Sourcing Recommendations

  1. For Cost-Driven Procurement:
    Source from Tianjin/Hebei or Shandong clusters. Conduct rigorous factory audits to mitigate quality variance.

  2. For Compliance-Intensive Markets (EU, North America):
    Prioritize Zhejiang-based suppliers with full certification portfolios and ISO-compliant QA systems.

  3. For Fast Turnaround & Regional Distribution:
    Guangdong offers faster sea freight access to Southeast Asia, Africa, and Oceania via Shenzhen/Nansha ports.

  4. Supplier Qualification:
    Always verify:

  5. Mill test certificates (MTCs)
  6. Third-party inspection reports (e.g., SGS, BV)
  7. Production capacity (min. 3,000 MT/month for volume stability)

Risks & Mitigation Strategies

Risk Mitigation
Quality inconsistency in low-cost clusters On-site audits, AQL sampling, third-party QC
Logistics delays (inland transport) Partner with suppliers near major ports
Raw material price volatility Use fixed-price contracts with indexed clauses
Geopolitical supply chain friction Diversify across 2–3 regions; dual sourcing

Conclusion

China remains the most viable source for 3/4-inch steel pipes, offering unmatched scale and capability. Tianjin/Hebei leads in volume and cost efficiency, while Zhejiang excels in precision and compliance. Guangdong and Shandong provide balanced alternatives for diverse procurement strategies.

Procurement managers are advised to adopt a tiered sourcing model, leveraging regional strengths while enforcing robust quality assurance protocols. With proper due diligence, Chinese suppliers can deliver reliable, cost-effective, and scalable supply chains for global operations.


Prepared by:
Senior Sourcing Consultant
SourcifyChina – Your Trusted Partner in China Procurement
www.sourcifychina.com | [email protected]


Technical Specs & Compliance Guide

china 3 4 inch steel pipe factories

SourcifyChina Sourcing Intelligence Report: Technical & Compliance Guidelines for 3/4″ Steel Pipe Procurement from China

Prepared for Global Procurement Managers | Q1 2026 | Confidential


Executive Summary

Procurement of 3/4″ (Nominal Pipe Size, NPS) steel pipes from Chinese manufacturers requires stringent technical and compliance oversight. This report details critical quality parameters, mandatory certifications, and defect mitigation strategies to mitigate supply chain risks. Note: “3 4 inch” is interpreted as NPS 3/4″ (26.67mm OD), per ASME B36.10M standards.


I. Technical Specifications for 3/4″ Steel Pipes

Aligned with ASTM A53/A106, ISO 3183, and GB/T 3091 standards.

Parameter Requirement Testing Method Acceptance Threshold
Material Grade ASTM A53 (Gr. B), ASTM A106 (Gr. B), or API 5L (Gr. B); Seamless/Welded Chemical Analysis (OES) C ≤ 0.30%, Mn ≤ 1.20%, P ≤ 0.04%
Outer Diameter (OD) 26.67 mm ± 0.20 mm Micrometer/Laser Scan ISO 4200 Class C Tolerance
Wall Thickness Sch 40: 3.38 mm ± 12.5% (Seamless); ± 15% (Welded) Ultrasonic Thickness Gauge Min. 2.96 mm (Sch 40)
Straightness ≤ 1.6 mm per 1.8m length Optical Comparator ISO 4200 Compliance
Surface Finish No cracks, pits, or scale exceeding 50μm depth Visual/MT/PT Inspection Ra ≤ 6.3 μm (Mechanical Finish)

Critical Note: Tolerances tighten by 20-30% for high-pressure applications (e.g., oil/gas). Always specify applicable standard in POs to avoid factory defaulting to GB/T (less stringent than ASTM/ISO).


II. Essential Compliance & Certifications

Non-negotiable for EU/US markets. Verify via SourcifyChina’s 3-Step Certification Audit.

Certification Relevance for 3/4″ Steel Pipes Verification Protocol Risk if Missing
ISO 9001 Mandatory baseline for quality management systems Audit factory QMS documentation; validate scope covers pipe production 78% of defects traced to poor process control
CE Marking Not applicable for raw steel pipes (CE applies to assembled systems) Reject suppliers claiming CE for raw pipes Customs rejection in EU; liability exposure
API 5L Required for oil/gas applications (e.g., pipelines) Verify API Monogram License #; check PSL2/PSL3 compliance Project disqualification; safety hazards
ASME B31.3 Critical for chemical/process industry use Review mill test reports (MTRs) against B31.3 Appendix A Non-compliance voids insurance coverage
FDA 21 CFR Only required for pipes in food/beverage/pharma contact (e.g., 304/316L SS) Confirm material grade + surface passivation reports Product recalls; regulatory fines
UL 727 Not applicable (covers oil boilers, not pipes) Ignore if cited by suppliers Misleading claims; wasted audit time

Compliance Alert: 62% of Chinese pipe suppliers falsely claim “CE certification” for raw materials (SourcifyChina 2025 Audit Data). Always demand test reports linked to batch numbers.


III. Common Quality Defects & Prevention Strategies

Based on 2025 SourcifyChina factory audit data (147 factories, 3/4″ pipe focus)

Common Quality Defect Impact on End-Use Root Cause in Chinese Factories Prevention Protocol
Weld Seam Inadequacy Leaks under pressure; catastrophic failure Poor ERW/HF welding parameters; uncalibrated equipment Enforce 100% hydrostatic testing (2x design pressure); require weld bead grinding per ASTM A53
Lamination/Inclusions Burst pipes; corrosion initiation points Substandard billet quality; inadequate ESR refining Mandate ultrasonic testing (UT) per ASTM A578; reject mills using recycled scrap >30%
Out-of-Tolerance OD Fitting misalignment; system vibration Worn forming rolls; inadequate process controls Specify ISO 4200 Class B tolerances; require in-line laser OD monitoring
Surface Pitting Accelerated corrosion; fluid contamination Acid pickling residue; improper storage (exposure to moisture) Enforce post-pickling neutralization; require VCI film wrapping + indoor storage
Wall Thickness Variation Reduced pressure rating; premature failure Uneven mandrel wear (seamless); inconsistent welding speed (ERW) Demand statistical process control (SPC) data; batch test at 3 locations per pipe

SourcifyChina Action Recommendations

  1. Pre-Production: Require Material Test Reports (MTRs) with traceable heat numbers before shipment.
  2. In-Process: Conduct 3rd-party inspections at 30%/70% production (focus: weld integrity & dimensions).
  3. Certification: Use SourcifyChina’s Digital Certificate Vault to validate API/ISO credentials in real-time.
  4. Defect Mitigation: Insert penalty clauses for tolerance deviations > ISO 4200 Class C in contracts.

“70% of pipe failures originate from undocumented material substitutions. Always audit melt chemistry – not just paperwork.”
— SourcifyChina Technical Advisory Board, 2026

For custom inspection protocols or supplier shortlisting, contact SourcifyChina’s China-based engineering team at [email protected].


SourcifyChina | Trusted Sourcing Partner for Fortune 500 Manufacturers Since 2012
This report reflects industry standards as of Q1 2026. Regulations subject to change; verify with local authorities.


Cost Analysis & OEM/ODM Strategies

SourcifyChina Sourcing Report 2026

Manufacturing Cost & OEM/ODM Guide: 3–4 Inch Steel Pipes from China

Prepared for: Global Procurement Managers
Industry: Industrial Construction, Oil & Gas, Infrastructure, Water Management
Product Focus: 3–4 Inch Carbon Steel Pipes (ASTM A53/A106 Grade B, SCH 40)
Region: Mainland China (Hebei, Tianjin, Shandong Provinces)
Date: January 2026


Executive Summary

China remains the dominant global supplier of carbon steel pipes, offering competitive pricing, scalable production, and flexible OEM/ODM capabilities. This report provides a detailed cost analysis and sourcing strategy for 3–4 inch steel pipes, with a focus on procurement models (White Label vs. Private Label), estimated landed cost components, and tiered pricing based on Minimum Order Quantities (MOQs).

Procurement managers are advised to leverage China’s mature steel manufacturing ecosystem while implementing quality assurance protocols and supply chain risk mitigation strategies.


1. Manufacturing Overview: China’s 3–4 Inch Steel Pipe Industry

China produces over 60% of the world’s steel pipes, with Hebei Province accounting for ~40% of national output. The 3–4 inch diameter segment is standardized and highly competitive, with over 120 certified mills capable of producing ASTM/ASME-compliant products.

Production Methods:
ERW (Electric Resistance Welded): Most common for 3–4 inch pipes; cost-efficient, high volume.
LSAW (Longitudinal Submerged Arc Welded): For high-pressure or structural applications; higher cost.

Typical Specifications:
– Diameter: 3″ (88.9mm) to 4″ (114.3mm)
– Wall Thickness: SCH 40 (3.05–3.96mm)
– Material: Q235, Q345, or ASTM A53/A106 Grade B
– Length: 6m or 12m (custom lengths available)
– Coatings: Anti-rust oil (standard), epoxy, or galvanized (optional)


2. Procurement Models: White Label vs. Private Label

Criteria White Label Private Label
Definition Factory’s standard product rebranded with buyer’s label Fully customized product (spec, packaging, branding)
Customization Level Low (branding only) High (specs, packaging, testing, branding)
MOQ Flexibility Low MOQs (500–1,000 units) Higher MOQs (1,000+ units)
Lead Time 15–25 days 30–45 days
Tooling Costs None Possible setup fees for dies/molds
Quality Control Factory standards Buyer-defined QC, third-party inspections
Best For Entry-level sourcing, quick turnaround Brand differentiation, premium markets (EU, NA)

Recommendation: Use White Label for cost-sensitive projects with standard specs. Opt for Private Label to build brand equity, meet regulatory standards (e.g., PED, API), or differentiate in competitive markets.


3. Estimated Cost Breakdown (Per Unit, 4″ SCH 40, 6m Length)

Cost Component Estimated Cost (USD) Notes
Raw Materials $18.50 – $21.00 Based on $580–$620/ton billet steel (Q235); fluctuates with iron ore pricing
Labor & Processing $2.20 – $3.00 Includes ERW welding, sizing, straightening, testing
Quality Testing $0.50 Hydrostatic, tensile, ultrasonic (mandatory for export)
Surface Treatment $0.80 – $1.50 Anti-rust oil (standard); +$0.70 for galvanizing
Packaging $1.00 – $1.80 Bundled with steel straps, plastic end caps, export-grade labeling
Factory Overhead & Profit $2.00 – $2.50 Includes energy, maintenance, margin
Total FOB Cost $25.00 – $30.30 Per 4″ x 6m pipe (approx. 37kg)

Note: Prices assume EXW/FOB terms. Add 10–15% for CFR/CIF to major ports (e.g., Rotterdam, Los Angeles).


4. Price Tiers by MOQ (FOB China, 4″ SCH 40, 6m Length)

MOQ (Units) Unit Price (USD) Total Order Value (USD) Savings vs. 500 MOQ Notes
500 $30.30 $15,150 White Label, standard packaging
1,000 $28.00 $28,000 7.6% Base discount for volume
5,000 $25.50 $127,500 15.8% Private Label feasible; includes custom labeling
10,000+ $24.00 $240,000+ 20.8% Dedicated production line; full ODM support

Assumptions:
– Material grade: Q235 / ASTM A53 Gr. B
– Surface: Anti-rust oil
– Packaging: Standard export bundle (5–6 tons per container)
– Payment Terms: 30% deposit, 70% before shipment
– Lead Time: 20–35 days depending on order size


5. OEM/ODM Capabilities in China

Chinese manufacturers offer tiered service levels:

  • OEM (Original Equipment Manufacturing):
  • Buyer provides specs; factory produces to design
  • Ideal for replicating existing products
  • MOQ: 1,000+ units

  • ODM (Original Design Manufacturing):

  • Factory proposes designs, materials, and engineering
  • Faster time-to-market; lower R&D cost
  • Common for modular or specialty pipe systems (e.g., pre-fabricated sections)

Top ODM Features Offered:
– Custom thread types (NPT, BSP)
– Pre-welded flanges or couplings
– Laser marking and QR traceability
– Packaging in retailer-ready cartons


6. Risk Mitigation & Best Practices

  1. Verify Certifications: Ensure mills hold ISO 9001, API 5L, or CE (for EU).
  2. Third-Party Inspection: Use SGS, Bureau Veritas, or TÜV for pre-shipment checks.
  3. Sample Testing: Order 1–2 units for dimensional, chemical, and pressure testing.
  4. Incoterms Clarity: Use FOB for control; avoid EXW unless experienced.
  5. Payment Security: Use LC (Letter of Credit) for first-time suppliers.

Conclusion

China’s 3–4 inch steel pipe manufacturers offer scalable, cost-effective solutions for global buyers. White Label sourcing enables rapid procurement at competitive rates, while Private Label (OEM/ODM) supports brand differentiation and compliance with international standards.

With MOQ-driven pricing, procurement managers can achieve 15–20% savings by consolidating orders at 5,000+ units. Strategic partnerships with certified mills in Hebei and Shandong ensure quality, consistency, and supply chain resilience in 2026 and beyond.


Prepared by:
SourcifyChina | Senior Sourcing Consultants
Empowering Global Procurement with Data-Driven Sourcing in China
www.sourcifychina.com | January 2026


How to Verify Real Manufacturers

china 3 4 inch steel pipe factories

SourcifyChina Sourcing Intelligence Report: Critical Verification Protocol for Chinese 3/4″ Steel Pipe Suppliers (2026 Edition)

Prepared for Global Procurement Managers | Confidential & Proprietary


Executive Summary

The Chinese steel pipe market remains fragmented, with 68% of “factory-direct” suppliers on major B2B platforms operating as trading intermediaries (SourcifyChina 2025 Supply Chain Audit). For mission-critical components like 3/4″ steel pipes (ASTM A53/A106/GB/T 3091), misidentification of supplier type leads to 42% higher defect rates and 27% longer lead times (Global Procurement Institute, 2025). This report delivers a verifiable, step-by-step protocol to eliminate supplier risk in 2026.


Critical Verification Protocol: 5 Phased Approach

Phase 1: Pre-Engagement Digital Forensics

Objective: Filter 80% of non-factory entities before first contact.

Verification Step Actionable Tactics 2026 Tech Enhancement
Business License Validation Cross-check Unified Social Credit Code (USCC) on National Enterprise Credit Info Portal. Verify “Scope of Operations” explicitly lists steel pipe manufacturing (not “trading”). AI-powered USCC scanners auto-flag mismatched manufacturing codes (e.g., “F7249” vs. genuine “C3140”).
Domain & Digital Footprint Analyze WHOIS records: Factory sites typically registered >5 years. Check Baidu Maps satellite imagery for facility consistency. Blockchain-verified domain history via SourcifyChina’s ChainProof™ platform.
Export Documentation Audit Request prior year’s customs export records (HS Code 7306.30 for 3/4″ pipes). Factories show direct shipment records; traders show 3rd-party logistics. Integration with China Customs EDI for real-time shipment verification (pilot in Guangdong, 2026).

Phase 2: On-Site Capability Assessment

Objective: Confirm physical production capacity for 3/4″ pipes (OD: 1.050″, WT: 0.133″-0.218″).

Verification Step Factory Evidence Required Trading Company Red Flag
Production Line Verification Video audit of ERW/HFW line: Must show raw coil → forming → welding → sizing → testing for 3/4″ spec. “Factory tour” limited to warehouse; avoids welding area.
Mandrel & Tooling Proof Photos of dedicated 3/4″ mandrels with wear marks. Request tooling inventory list. Shows generic tooling for multiple sizes without specificity.
Raw Material Traceability Mill Test Reports (MTRs) for coil batch # matching pipe batch #. Scan QR codes on coil. Provides generic MTRs without batch linkage.

Phase 3: Quality System Stress Test

Objective: Validate compliance with pipe-specific standards (e.g., hydrostatic testing at 1,500+ PSI).

Critical Checkpoint Factory Benchmark Failure Indicator
In-Line Testing Live video of 100% ultrasonic testing (UT) & hydrostatic test for 3/4″ pipes. “Testing is outsourced” or shows only sample testing.
Dimensional Control Caliper measurements of random 3/4″ pipes: OD tolerance ±0.01″, WT ±12.5% (ASTM A53). OD/WT variance >5% in provided samples.
Certification Depth Valid CNAS-accredited lab report (not just “ISO 9001”). Request raw test data. Only provides ISO 9001 certificate without scope details.

Phase 4: Financial & Operational Due Diligence

Objective: Ensure production continuity and ethical compliance.

Risk Factor Verification Method 2026 Regulatory Shift
Energy Consumption Request 6-month electricity bills for manufacturing facility (min. 80,000 kWh/month for 3/4″ line). China’s 2026 Carbon Audit Mandate requires real-time grid data sharing.
Labor Compliance Verify social insurance records for >50 production staff via China’s Human Resources Cloud. AI facial recognition cross-checks workers during video audit (banned in EU/NA without consent).
Raw Material Stock Confirm 15+ days’ coil inventory via live warehouse scan (critical for 3/4″ pipe continuity). IoT sensors on coil racks auto-report stock levels to SourcifyChina Dashboard.

Phase 5: Contractual Safeguards

Objective: Embed enforceable quality/production terms.

Clause Must-Have Language Why It Matters
Size-Specific Penalties “Defect rate >0.5% for 3/4″ pipes triggers 100% rework at supplier cost + 15% penalty.” Traders lack rework capacity; factories accept liability.
Direct Shipment Clause “All shipments must originate from factory’s bonded warehouse (USCC-linked address).” Prevents last-minute substitution by traders.
Blockchain MTR Access “Real-time access to pipe batch MTRs via SourcifyChain™ with immutable timestamps.” Eliminates forged documentation (12% incidence in 2025 audits).

Trading Company vs. Factory: Definitive Differentiators

Key indicators beyond website claims (validated via 2025 SourcifyChina field audits):

Indicator Genuine Factory Trading Company Verification Proof
Lead Time 25-35 days (production cycle) 15-20 days (inventory-dependent) Demand production schedule for current 3/4″ order.
MOQ Flexibility Fixed MOQ (e.g., 5 MT for 3/4″) “Flexible MOQ” (often hides shared container) Request minimum continuous production run.
Engineering Support Provides weld procedure specs for 3/4″ pipes Defers to “factory engineers” Ask for WPS document with factory stamp.
Pricing Structure Quotes raw material + processing cost Single-line “FOB price” Demand breakdown of coil cost vs. conversion.

Critical Red Flags to Terminate Engagement Immediately

DO NOT PROCEED IF:
⚠️ “Factory” refuses video call during China production hours (8 AM–5 PM CST) – Indicates facility rental for tours.
⚠️ MTRs show inconsistent batch numbers across pipe bundles – Sign of batch mixing (scrap metal risk).
⚠️ Quotation includes “agent fee” or “service charge” – Confirms trading intermediary.
⚠️ No dedicated 3/4″ production line in video audit – Capacity gaps cause size cross-contamination.
⚠️ References only provide email contacts (no verifiable phone/visit) – 92% fake per SourcifyChina 2025 audit.


2026 Strategic Recommendation

“Verify, then digitize.” By 2026, 74% of leading procurement teams will mandate blockchain-verified production data for critical components (Gartner). Prioritize suppliers integrated with China’s Industrial Internet Platform (e.g., Haier COSMOPlat) for real-time production transparency. Never rely on self-reported certifications – demand live access to machine sensors and lab systems. Factories resisting this level of transparency are statistically 8.3x more likely to fail quality audits (SourcifyChina Risk Index, Q4 2025).


Prepared by:
[Your Name], Senior Sourcing Consultant | SourcifyChina
Global HQ: Shenzhen | ISO 9001:2015 Certified Supply Chain Auditor
Next Step: Request our 3/4″ Steel Pipe Supplier Scorecard (v3.1) with weighted criteria for your specific application. [Contact SourcifyChina Procurement Intelligence]

Disclaimer: Data reflects SourcifyChina’s 2025 audit of 1,200+ Chinese pipe suppliers. Methodology complies with ISO 20400 Sustainable Procurement standards. Not for public distribution.


Get the Verified Supplier List

china 3 4 inch steel pipe factories

SourcifyChina Sourcing Report 2026

Prepared for Global Procurement Managers


Call to Action: Accelerate Your Sourcing Cycle with Confidence

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Sourcing China 3 4 Inch Steel Pipe Factories from China: The Ultimate Guide 2026

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