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DBP Logo

Hangzhou Double-Peace

Industry Trading Co., Ltd.

Working Together for a Safer Piping World

DBP delivers high-integrity piping components trusted by global energy, petrochemical, and infrastructure industries. Precision-engineered, third-party inspected, and built to last.

Industrial piping components

About DBP

Hangzhou Double-Peace Industry Trading Co., Ltd. is a professional supplier of industrial piping solutions with over a decade of experience serving international markets.

Global Reach

Serving clients across Asia, the Middle East, Africa, and the Americas with reliable delivery and technical support.

Certified Quality

Products meet ANSI, API, ASTM, EN, JIS, and other international standards. Third-party inspections welcomed.

Expert Team

Dedicated engineers and project managers ensure technical accuracy and on-time delivery for every order.

Customer Focus

Tailored solutions, responsive communication, and long-term partnerships are at the heart of our business.

Our Commitment to Excellence

At DBP, we understand that safety, reliability, and performance are non-negotiable in critical piping systems. That’s why every product undergoes rigorous quality control and is manufactured to meet or exceed international standards.

From raw material sourcing to final inspection, our processes are designed to deliver consistent quality that withstands third-party verification.

Product Center

Comprehensive range of high-performance piping components for oil & gas, chemical, power, and industrial applications.

Flange

Flange

  • Types: Welding Neck, Slip-On, Socket Welding, Blind, Lap Joint
  • Standards: ANSI B16.5, B16.47, EN1092-1, BS4504, JIS, KS
  • Materials: ASTM A105, A350 LF2/LF3, A182 F304/316L, Inconel
  • Sizes: 1/2" to 160"
  • Face Types: RF, FF, RTJ, Male/Female
Fitting

Fitting

  • Types: Elbow, Tee, Reducer, Cap, Coupling, Union
  • Standards: ANSI B16.9, B16.11, MSS SP-43/75, ISO 4144
  • Materials: ASTM A234 WPB, A403 WP316L, A815 S31803
  • Sizes: 1/2" to 72"
  • Pressure: SCH 5s to XXS, 150LB to 9000LB
Pipe

Pipe

  • Types: Seamless, ERW, LSAW, SSAW, EFW
  • Standards: ANSI B36.10, B36.19
  • Materials: API 5L X42-X70, ASTM A312 TP304L/316L, A335 P11/P91
  • Sizes: 1/8" to 80"
  • Wall: SCH 5s to XXS
Valve

Valve

  • Types: Gate, Ball, Check, Butterfly, Globe, Plug, Needle
  • Standards: API 609, API 594, MSS SP-67/80, AWWA C504/509
  • Materials: Cast Iron, Ductile Iron, Forged Steel, Albronze
  • Sizes: DN15 to DN1200
  • Class: 150LB to 2500LB
Plate and Coil

Plate/Coil

  • Types: Plate, Sheet, Coil
  • Materials: ASTM A240 TP304L, 316L, 321, 904L, S31803, S32750
  • Manufacturers: BAOSTEEL, TISCO, LISCO, JISCO, ZPSS, ESS
  • Sizes: t*1219/1500*C, t*1500/2000*6000mm
Gasket

Gasket

  • Ring Joint (RTJ), Spiral Wound, Full Face, Non-Asbestos
  • Materials: Graphite, PTFE, Rubber, Metal Jacketed
  • Standards: ASME B16.20, B16.21, EN 1514
  • Temperature & pressure resistant sealing solutions
  • Custom sizes and materials available
Fastener

Fastener

  • Bolts, Nuts, Studs, Screws, Washers
  • Materials: ASTM A193 B7, A320 L7, A194 2H, 8.8, 10.9, 12.9
  • Stainless Steel: A193 B8, B8M, F51, F55
  • Coatings: Zinc, Hot-Dip Galvanized, Dacromet
  • Custom machining and threading available
Insulating Joint

Insulating Joint

  • Prevents galvanic corrosion in pipelines
  • Used in cathodic protection systems
  • Materials: Carbon steel, stainless steel with insulating kits
  • Standards: NACE SP0472, API 6A
  • Sizes: 1/2" to 60", custom designs available

Quality Control & Project Management

DBP’s quality assurance system ensures every component meets the highest standards of performance and safety.

Third-Party Inspection

All goods withstand third-party inspection. We welcome SGS, BV, CE, and client audits.

Certified Compliance

Our products comply with ANSI, API, ASTM, EN, JIS, and other international standards.

On-Time Delivery

Dedicated project management ensures timely production, inspection, and global shipping.

Quality inspection

10+ Years

In Industrial Supply

Connect with DBP

Reach out for product inquiries, technical support, or partnership opportunities. We respond promptly to all professional inquiries.

Email

sales@dbp-cn.com

Phone

+86-571-85287280

Fax

+86-571-87043729

Visit Official Website to Contact

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