Round Crepe paper tube used for Oil type transformer

Round Crepe paper tube used for Oil type transformer

Round Crepe paper tube used for Oil type transformer


Application: Electrical insulation crepe paper tube for Oil -Transformer

Place of Origin: China (Mainland)                 Brand Name: XINCHENG

Product name: kraft paper tube                  Material: INSULATION PAPER

Construction: 4-20 layers                       Insulation class: A (105-℃)

Length: 1000 — 2000 mm or customized           Color: Natural or Light brown

Breakdown in Oil: 26.2-104.0KV                  Wrinkling: ≥50% or customized

OEM, ODM service:  Avaliable                   Sample: Free

Inner Diameter: 3~50mm                       Outer Diameter: 5~54mm

Thickness of raw material: 0.05mm , 0.075mm,0.08mm,0.13mm

IEC Standard: IEC-60554                         Material: wood pulp

Tensile Strength: 10.4Mpa as product              Package: wooden case


Product Introduction:

Insulation Crepe Paper is one of the most important solid insulation materials used in transformers. Its quality directly influences the life span of the transformer. The BDV is enhanced by up to 80% as compared to base kraft paper. To ensure of best quality of Crepe paper, the base kraft paper is manufactured using longer fibers of pure wood pulp.
Standard base paper thickness: 0.05mm,0.075mm, 0.08mm & 0.13mm

Made of electrical grade insulation crepe kraft paper, these tubes are used as sleeves for interconnection of terminals, and well used in the oil-type transformers with higher rate of absorption of oil to ensure higher dielectric strength compared to conventional SRBP tubes. They can be bent under extreme conditions without collapsing. Different inner diameter and outer diameter can be offered by customers’ requirement.

Standard length is 1100 mm.


Product Description

  1. Composition: Crepe tubes made from 100% electrical kraft paper 100% using non ionized water during crepe process to maintain electric properties. Special adhesive is used which it has a good resistance to oil transformer.
    2. Properties: High flexibility. High turn capability.
    No stress when tube is stretched.
    No contamination of oil transformer is guaranteed.
    3. Application: special application for oil transformers.
  2. Our advantage
    We can offer 1.8m and 2.0m length of this product, which overcame the inconsistency in diameter and easy wrinkling caused by over-length,  we can provide crepe paper tubes with various specifications from 4mm inner diameter.
    Our crepe paper tubes made by fully-automatic machine, it can never be achieved by manual and semi-automatic machines. With the same inner and outer diameters, and according to transformer design principle, more turns creates higher insulativity and tighter winding which contributes to higher elasticity, flexibility, and stronger resistance to bending. So it is possible to product crepe paper tube with the same specification and the same size. The quality of the finished crepe paper tube made by manual weighs only about half the weight of that made fully-automatically because of small volumes of loose layers and the flexibility and intensity is very low.

Standard crepe tube dimension:
– Inside diameter: since 3mm to 50 mm
– Thickness wall : since 0.8mm to 3,0mm
– Nominal Length: 1800mm, 2000mm,1000 mm as standard
Other type can be delivered under special order,such as below:

Inner / outer diameter and can produce other specification as per client request.



Round Crepe paper tube used for Oil type transformer Technical data





 Thickness of raw material
0.05mm 0.075mm 0.08mm 0.13mm
Thickness of crepe paper mm 0.35±0.05 0.48±0.08 0.80.60±0.08 0.80±0.10
Ash content % ≤ 0.7 ≤ 0.7 ≤ 1.0 ≤ 1.0
Moisture % 6.0-9.0
Diethyl ether % ≤0.3 ≤0.3 ≤0.4 ≤0.5
Water extract PH value 6.0-8.0
Polluted oil % ≤0.1

Tensile strength

MD KN/M ≥1.96 ≥2.6 ≥3.0 ≥3.3
TD KN/M ≥1.3 ≥1.96 ≥2.3 ≥2.7
Wrinkling % ≥ 50
Breakdown voltage V/layer ≥950 ≥1000 ≥1000 ≥1000
Electric conductivity ms/m ≤8.0 ≤8.0 ≤9.0 ≤10.0


Technical parameter:

No. Index Name Unit Index
1 Wrinkle Number a /10mm Long Number Required In Code
2 Oil Suction Height Portrait mm/10min ≥7
mm/60min ≥30
Transverse mm/10min ≥20
mm/60min ≥50
3 Water Content % ≤8
4 Ash Content % ≤1
5 Conductivity Of Aqueous Extract Ms/m ≤10
6 Ph Of Aqueous Extract 6-8
7 Electrical Strength Mv/m ≥20


Round Crepe paper tube used for Oil type transformer Packaging & Delivery

Packaging Details

  1. Packed with plastic bag first, then put into cartons, finally palletized.
    2. Size of pallet is around 1100x1900x2200mm for 1.8m length tube.

Delivery Time:Around 2-4weeks



Q 1. Are you manufacturer or trading company? Where and when founded?

A: The joint of manufactuer and trading company, who is founded in 2012 and located in TIANJIN City, China.

Q 2. What is the payment term of your company?

A: TT, L/C for large order; Western union, is also acceptable for small order.

Q 3. Can you guarantee the quality is the same as that of sample when mass production?

A: Sure. Preshipment sample can be sent, or any kind of inspection is acceptable.

Q 4. What certificate you have?

A: ISO9000 or other test report can be provided if clients’ require.

Q 5. How long is the sample making time? And how can we get?

A: Within 7 days for lab making. Free sample within 1kg can be provided on customer’s international express courier.

Please Contact Us

Miss: lydia

Mob: 86-13752439076      Fax: 86-22-60863016

WeChat :86-13752439076   WhatsApp: 86-13752439076