Our company mainly produces casing coupling and tubing coupling, since you are an international trading
company dealing with oil equipment, may be my email to you would be helpful to your company’s further development. First, we are one of the 4 of the best manufacturers in the field of oil pipe couplings in China, we are also certificated by API, Second, our factory locates in Tianjin Port, where there is the biggest steel pipe tubing production base, which would be very convenient for you to fulfill purchasing task; third, we enjoy a good fame in coupling production ,and now, since the export of our couplings increases very fast, and adds up to more than 60 percent of our sales volume, our company has made a choice to expand market by contacting both directly and indirectly with international purchasers. You know dealing with manufacturers will surely cut your purchasing cost to a great degree.
Our raw materials were chosen from the suppliers which passed certification of API such as Tianjin Seamless Steel Tube Plant. Our company has passed API Spec 5CT.
We are the designated supplier of Tianjin days Steel Oil Pipe Co., Ltd, Shengli oil field, Daqing oil field and changing oil field, China’s biggest oil company.
Our products specification range from 2-3/8”~20”, the steel grades are J55, K55, N80, P110. We have diverse product variety, complete specifications, which includes all of the tubing and casing couplings prescribed in API 5CT, providing diverse choice alternatives to buyers. We are one of the semi-finals in petrol pipe tubing and casing couplings due to its superior processing technology, producing capability, and 100% ex factory pass rate, which has helped us earned customers high esteem both home and abroad.
The internal control standard we adopt is 0.2 times reduced than the standard tolerance of API standard, we adopt the wet fluorescent magnetic particle test equipment in nondestructive examination. The thread parameters are 100% inspected by Thread Single Item. The thread surface is treated with phosphate by using anti- thread gluing phosphating solution, to make sure that the times of make-and-break are above 4 times. The measuring equipment adopted are to be sent to state-designated inspection organization to have tests periodically in accordance with regulation standard.Our goal in quality management is to make sure that the internal qualification rate is above 97%, and 100% qualified for outgoing products.