ECOIN INSULATION is a professional manufacturer and exporter of ASJ fiberglass pipe insulation (also known as ASJ glass wool pipe or preformed fiberglass pipe insulation). With years of export experience to the North American market, ECOIN provides reliable, well-packaged insulation solutions that ensure consistent quality and easy installation.
ASJ fiberglass pipe insulation is made with an Aluminum Foil–Scrim–White Kraft (ASJ) facing that serves as a vapor barrier and gives the pipe a clean, professional appearance. It’s widely used in HVAC, plumbing, and industrial piping systems to improve thermal efficiency and prevent condensation.

ECOIN’s Manufacturing Advantages and Technical Expertise

ECOIN INSULATION focuses on every production detail to ensure perfect fit and performance. Below are our key technical highlights:

1. Uniform Wall Thickness and Diameter

Each fiberglass pipe is produced with strict control of wall thickness and inner diameter, ensuring consistent performance and an accurate fit for both iron and copper pipes.

2. Proper Longitudinal Slit for Easy Installation

The slit opening is designed wide enough for smooth opening and closing during installation. A video demonstration is available below showing the process.

3. ASJ Facing Alignment to Leave Slit Unsealed

We ensure the ASJ facing does not cover the slit area, avoiding adhesive overflow that could seal the pipe shut.

4. Matching ASJ Tape Available

ASJ tape is used to seal joints between pipe sections. Please inform our sales team if you need ASJ tape included in your quotation.

5. Fire-Resistant Facing for North America

We use flame-retardant ASJ facing — aluminum foil is non-combustible, and the white kraft paper layer is made from fire resistant paper to meet safety needs.

6. Copper Pipe vs Iron Pipe – Size Identification

Customers often specify sizes in inches without clarifying if they are copper or iron pipes. Copper pipes are smaller for the same inch size. ECOIN provides a size comparison chart to ensure correct inner diameters for every order.

Copper Pipe Size Iron Pipe Size True Insulation ID
(inch) (inch) (inch) (mm)
1/2″ ID” (5/8″ OD) — 0.63 16
3/4″ ID (7/8″ OD)  1/2 0.90 23
1″ ID (1-1/8″ OD)  3/4 1.15 29
1-1/4″ ID (1-3/8″ OD) 1 1.4 36
1-1/2″ ID (1-5/8″OD) 1 1/4 1.7 43
2″ ID (2-1/8″ OD) 1 1/2 1.97 50
— 2 2.4 61
2″ ID (2-1/8 OD) — 2.125 54
2 1/2 2.91 74
1/2″ ID” (5/8″ OD) — 0.625 16
3/4″ ID (7/8″ OD)  1/2 0.90 23
1″ ID (1-1/8″ OD)  3/4 1.15 29
1-1/4″ ID (1-3/8″ OD) 1 1.40 36
1-1/2″ ID (1-5/8″OD) 1 1/4 1.70 43
2″ ID (2-1/8″ OD) 1 1/2 1.97 50
— 2 2.4 61
2 1/8 — 2 1/8 54
— 2 1/2 2.91 74
2 5/8 — 2.625 67
— 3 3.54 90
3 1/8 — 3.125 79
— 3 1/2 4.15 105
— 4 4.55 116
4 1/8 — 4.125 105
— 4 1/2 5.15 131
— 5 5.62 143
— 6 6.69 170

7. Standard Export Packaging

All ASJ fiberglass pipes are packed in durable cartons or plastic bag, suitable for sea or air freight, with clear labeling for easy warehouse handling.

8. Why ½” Wall Thickness Fiberglass Pipe Is Rarely Made in China

In China, fiberglass pipe production involves both machines and manual rolling. Thinner pipes require far more labor to maintain wall uniformity, making ½” wall thickness pipes extremely time-consuming. For example, while 2” pipes can fill four containers per week, ½” pipes may take up to three months for a single container.

ECOIN’s Export Experience and Quality Control

With extensive export experience to North America, ECOIN ensures every shipment meets customer expectations:

  • Proper slit opening for smooth installation
  • ASJ facing alignment without adhesive overflow
  • Consistent wall thickness and pipe diameter
  • Neat packaging with clear labels

By controlling every detail, ECOIN helps overseas clients avoid installation problems and sizing mistakes.

Applications of ECOIN ASJ Fiberglass Pipe Insulation

  • HVAC duct and piping systems
  • Industrial process pipelines
  • Plumbing and refrigeration systems
  • Chiller and boiler lines
  • Thermal efficiency retrofits

Why Choose ECOIN INSULATION

  • Years of export experience to North America
  • Strict production and inspection standards
  • Flexible customization and packaging
  • Fast and responsive communication

Whether you are an importer, distributor, or project contractor, ECOIN provides stable supply and professional service for ASJ fiberglass pipe insulation.

Contact ECOIN INSULATION

Looking for a reliable ASJ fiberglass pipe insulation supplier from China? Contact ECOIN INSULATION today for a quotation or technical consultation. Our team provides support on product selection, packing, and export logistics.