API 5L GR.B ERW Steel Pipe is a high-frequency electric resistance welded steel pipe specially manufactured for oil, gas, water, and general fluid transmission pipelines.
This batch of pipes is processed with double-end external thread, equipped with one forged coupling and one thread protector per pipe.
Two surface treatment options are available: black vanish coating and hot-dip galvanized, which is widely used in onshore pipeline engineering, petrochemical industry, water supply and drainage, and low-pressure steam transmission projects.
Production Standard & Core Specification
1.Executive Standards
|
Item |
Executive Standard |
|---|---|
|
Steel Pipe Body |
API 5L (46th Edition), PSL1 |
|
Thread Processing |
API 5B (Round Thread), 8 TPI |
|
Coupling & Threaded Fittings |
ASME B16.11, 3000LB Forged Steel |
|
Surface Treatment |
Black Varnish / Hot-Dip Galvanized |
|
Manufacturing Process |
ERW (High-Frequency Electric Resistance Welding) |
2 .Basic Technical Parameters
|
Item |
Technical Data |
|---|---|
|
Steel Grade |
API 5L GR.B |
|
Minimum Yield Strength |
241 MPa (35 Ksi) |
|
Tensile Strength |
413 - 655 MPa |
|
Working Pressure (Normal Temperature) |
2.5 - 12 MPa (Depends on OD & WT) |
|
Hydrostatic Test Pressure |
1.25 - 1.5 Times of Working Pressure |
|
Size Range |
1/2" - 24" (SCH40 / SCH80) |
|
Wall Thickness |
1.8mm - 22.2mm |
|
Fixed Length |
6m / 9m / 12m or Customized |
3.Pressure Test
All API 5L Grade B ERW pipes undergo mandatory hydrostatic testing in accordance with API 5L requirements to ensure structural integrity and leak-proof performance under specified pressure ratings.
Testing Performed:
-Chemical component analysis
-Mechanical properties (tensile, yield, elongation)
-Flattening test
-Bending test
-Impact test (required for PSL2)
-Hydrostatic test (100%)
-Non-destructive testing (UT/Eddy Current/Infrared)
-Dimensional inspection
Pipe End Thread & Coupling Details
1.Thread Parameter (Pipe Side)
-Thread Type: API 5B Round Taper Thread
-TPI (Threads Per Inch): 8 TPI
-Total Threads: 11 ±1 Threads
-Effective Threads: 8 - 9 Complete Threads
-Thread Tolerance: Strictly inspected by API 5B Thread Gauge
-Pipe End Configuration: Double-end external thread; one end with coupling, one end with thread protector
2.Coupling Specification
-Coupling Standard: ASME B16.11
-Pressure Class: 3000LB (Max Allowable Pressure: 20.69 MPa)
-Material: Forged Carbon Steel
-Feature: Coupling wall thickness is thicker than matching pipe wall to compensate thread cutting loss, ensuring equal pressure resistance with steel pipe.
Actual Export cases
Case 1: Paraguay - ASTM A53 GR.B Galvanized pipe for conduit
From 2018-2022year, we continuously supply Thread and coupling end pipe to our client in Paraguay
Project Details:
Destination: Asunción Port, Paraguay
Specification: 2″ *1.8mm × 5.8 M
Total Quantity: 50000 pcs
Application: Conduit Pipe
Case 2: Myanmar - API 5L GRA ERW STEEL PIPE
SZT supplied high-performance ERW pipes strictly conforming to API 5L standards for a major engineering project in Myanmar for end user MOGE. The pipes underwent rigorous non-destructive testing (NDT), hydrostatic testing, and flattening tests to ensure zero defects under high-stress conditions. the pipes were treated with anti-corrosion black painting and Both end Threads and one side Couplings,the other side with plastic caps protector.
Project Details:
Destination: Yangon Port, Myanmar
Specification: 3″ *SCH40 *20-25FEET
Total Quantity: 50000 pcs
Application: oil and gas line pipes
Our address
Rm1406,14th/F No 208, Hongqi Road, Nankai Dist, Tianjin City ,China
Phone Number( WhatsApp/Wechat)
+86 16622033809
alisa@tjshenzhoutong.com
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