Cheap solution 3 1/8" Plastic Thread Protector caps for drilling pipes OCTG
3-1/8 Inch Reference PP Thread Protector Caps for Pipe End Coverage
PP thread protector caps cover the matching threaded pipe end during transport and storage. For this 3-1/8 inch reference item, specify both the connection fit and the extent of end coverage. A cap description does not establish a pressure seal, watertight closure or a particular impact rating. Confirm the pipe family, pin or box orientation and drawing dimensions before selection. All-plastic and metal-plastic composite designs require separate construction and handling specifications.
Coverage specification: 3-1/8 inch reference with dimension meaning identified; PP grade and color by order; complete connection designation; pin or box end; engagement depth, seating clearance and covered surfaces. The broader 2-3/8 to 20 inch sizes and NC/REG references are separately selected items. BTC/STC/LTC casing connections need their own fit review; the size list does not establish interchangeability or availability.
Packaging & Shipping
| Port: | Shanghai |
| MOQ: | 1000 pcs,Custom parts: 5000pcs |
| Packing: | bulk packing or custom packing |
| Payment: | Payment method to be agreed in the quotation. |
| Delivery time: | Delivery schedule after cap geometry, tooling, coverage requirements and quantity confirmation. |
Other oil and gas industry accessories for choice:
Our company
Shanghai Qinuo supplies molded plastic components and oilfield accessories. This PP protector cap is selected by the pipe connection and the surfaces that need coverage during handling and storage.
Provide a drawing showing the thread, seating position and required cap depth. Include storage conditions and any separately specified closure requirements.
Agree molded dimensions, clearances, color and markings against the selected item. Review tooling and sample fit before ordering production quantities.
ISO 9001 applies to quality management. Environmental exposure, ingress protection and handling performance require defined acceptance criteria for the ordered design.
Cap geometry, coverage and production preparation:
FAQ
1. What does a thread protector cap cover?
The covered surfaces depend on cap depth, seating and connection geometry. Identify the thread area and pipe end surfaces required on the drawing.
The 3-1/8 inch reference must be linked to a defined dimension; it does not alone specify thread form, end orientation or closure.
2. What information is needed to specify coverage?
a. Pipe family and complete connection designation.
b. Pin or box end and drawing revision.
c. Cap depth, engagement length and seating position.
d. Thread and end surfaces to be covered.
e. Clearances and installation/removal requirements.
f. PP grade, color and identification.
g. Exposure conditions, quantity and packing instructions.
3. Does a cap provide a pressure or weather seal?
1. A thread protector designation alone does not establish sealing performance.
2. Specify whether open, vented or closed geometry is required.
3. Define ingress or closure acceptance criteria where needed.
4. Confirm the actual construction against the approved drawing.
5. Require relevant testing before using any sealing claim.
4. What should be checked when the sample arrives?
1. Confirm item, connection and end orientation.
2. Inspect for cracks, distortion and damaged engagement.
3. Check fit and seating on the intended pipe end.
4. Verify required coverage and removal clearance.
5. Record results against the approved sample and drawing.
Other pipe protector sizes and oilfield accessories require separate item specifications.
Send the pipe connection drawing and required coverage dimensions for cap selection.
Include exposure conditions, PP requirements and quantity in the quotation request.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.