Pipe industry especially plastic pipe industry as a new industry, the characteristics of environmental protection and energy saving products naturally attracted the favor of the market, in today's energy saving and environment protection of the environment has a strong growth.

However, in ten years, the rapid development of the industry has been implied a standard dispute, until recently, China Plastics piping Association annual meeting this controversy continues.

In 2003, Sichuan goldstone-orient new material equipment Limited by Share Ltd independently developed a new type of composite plastic pipe, steel reinforced bellows, the advent of new products will be the construction of municipal engineering in favor of its product standards (CJ/T2252006) in 2006 was promulgated.

Public information shows that the steel band reinforced bellows is added to the reinforcement of plastic bellows to impose enhanced, large diameter steel band reinforced bellows ring stiffness requirements more than SN8, and some more than SN16. In addition, the steel band reinforced corrugated pipe has low requirement for foundation treatment, good bending performance and light quality. The same caliber has a big advantage, Pang can reach 3000mm or more, the price is only 1000 yuan per meter, and the installation does not accept the connection material cost.

Beijing Plastics Industry Association, a person in charge has publicly said, "that a few years (2011 or so) relatively fire tube is reinforced bellows, often seen in the project." Senior Engineer Wei Ruoqi national chemical building materials test center also introduces, this pipe is high density polyethylene (PE) matrix with strip forming surface is coated with adhesive resin as the main support structure for the waveform, and winding composite double walled spiral corrugated tube integrated with polyethylene material. It has obvious advantages in stiffness, hydraulic characteristics, interface sealing, design life, corrosion resistance and laying and installation. Because of the high stiffness of ring and the characteristics of saving raw materials, it has been widely used in municipal field and exported very well in recent years.

"In the world, steel bellows technology in China is relatively advanced, and then in the country belongs to new technology research and development products, the market did not have this thing, and naturally there is no industry standards, you can refer to." Sichuan Huang Sheng Tube Industry Co., Ltd. General Manager Wu Zhiguo said in an interview with reporters.

It is understood that was involved in the drafting of "using steel reinforced polyethylene spiral corrugated pipe buried drainage (2006) industry standard" (hereinafter referred to as the "standard") and the Zhejiang maple leaf group, Sichuan goldstone-orient new material equipment Co., Ltd. and other well-known industry enterprises. In June 2006, the "standard" was issued by the Ministry of construction, which defined the definition of steel reinforced polyethylene (PE) spiral bellows, and the standards of raw material, pipe structure and connection mode.

"The drafting of standard technical indicators, referring to a part of other pipe indicators, part of the enterprise in the market back to practice data indicators." Witch told reporters, "at that time because there is no precedent can be based on reference, for insurance," the standard "technical indicators of the value of the general high, which is equivalent to pre-set an advance value. This has been confirmed in the subsequent market applications in the following years." Wu Zhiguo said, over the next few years, many enterprises found in the production and application, technical standard of anti-corrosion layer is high, some specifications can not meet the needs of the development of the industry.

Take the 1400 inch inner diameter corrugated steel pipe corrosion protection layer as an example. In the standard, the minimum value of the anticorrosive coating is 4mm.

In order to improve the industry standards, a number of well-known enterprises in China once again drafted the second edition of the industry standards. An example of a corrugated steel tube with a 1400 inner diameter is required. The minimum value of the corrosion resisting layer is changed to 3mm. The new standard was issued by the Ministry of construction in 2011. At this point, the old industry standards have been implemented for five years. In fact, as early as 2009, the Eleventh National plastics pipeline production and application technology promotion exchange meeting, some experts pointed out: "the standard has been implemented for three years.". In the choice of high speed development situation, it is urgent to sum up experience. At the same time, it is necessary to correct the mistakes of enterprises that do not carry out standards, and further amend the shortcomings of the current standards.  Some enterprises are discussing amendments to the industry standards, and have declared GB, in order to keep up with the large-scale development of this pipe needs."

"Numerical reduction" does not affect the use and purpose of the anti-corrosion layer." Wu told reporters that, in fact, even if the technical indicators of the anti-corrosion layer has been lowered by 25%, its thickness is still higher than the international technical indicators.

In this regard, Wei Ruoqi also believes that the coating thickness is pipe outer layer of polyethylene thickness and the thickness of the adhesive resin and the specifications by thinner, saving is considered from the angle of the material, but the actual life and does not affect the pipe.